Showing posts with label shark. Show all posts
Showing posts with label shark. Show all posts

2019/04/15

Shark Diversity and Order

Sharks come in many sizes and shapes and have a great deal of diversity in the over 500 plus species of living animals. Currently, science divide sharks into 9 specific orders; there are actually 13, but four orders of sharks are entirely extinct. And all sharks -big and small- fit into these categories.


1. Carcharhiniformes, otherwise known as the ground sharks or whaler sharks, include some of the most well known sharks. There are over 270 species making this order the largest of all shark orders. It includes the tiger shark, hammerhead sharks, hound shark, cat shark, shy eye shark, all of the reef sharks, and the bull shark. Some traits that differentiates these sharks from others is their lack of an inner eyelid and enlongated snouts. They average eighteen inches to twenty feet in length.


2. The order Echinorhiniforme contained only two sharks; The prickly shark and the bramble shark. These sharks are named due to the thorn like denticles covering their skin and are slow swimming sharks that dwell in the bottoms of their chosen environments


3. Lamniformes, otherwise known as the mackerel sharks, include the most famous shark- the great white. There are 15 species in this order which also includes the megamouth shark, mako shark, thresher shark, goblin shark, porbeagle shark, sand tiger shark, and basking shark. They have large jaws and give birth to live offspring. Sometimes their offspring will eat their siblings in the womb before birth. They range from 3 to 32 feet in length




4. The order Hexanchiformes, otherwise known as the six gill or cow sharks, contains only seven species and are the rarest and most primitive of all living sharks. Their defining characteristics include six or seven gill slits (all other sharks have five gill slits) and they have only one dorsal fin. This order contains the frilled shark, the cow shark, and the broadnose seven gill. They prefer cold, deep water.




5. Heterodontiforme is the name of the order that contains the bullhead sharks or horned sharks. This order only contains nine species which include the horn shark, Port Jackson shark, and the Zebra Bullhead shark. Its defining characteristic is a big head with large brows. They live off of crustaceans, mollusks, and sea urchins.


6. Squatiniformes, otherwise known as the angel sharks, are sharks that have bodies that are flattened like ray's / skates and live on the bottom of the sea and sandy places where they can easily hide. They average 4 to 6 feet in length from nose to tail end. This order includes the clouded angelfish and sand devil.


7. Orectolobiformes, also known as the carpet sharks or the wobbegongs, are defined by the ornate skin patterns that look like fancy carpets, nasel barbels as well as having a mouth in front of their eyes. Comprised of 39 species, this is the most diverse order of sharks and they come in all shapes and sizes. They range from 12" to 46 feet in length and include the nurse sharks, wobbegong, bamboo sharks, zebra shark, and the whale shark- the largest fish in the world.


8. Squaliformes, also known as the dogfish sharks,has about 126 different species and includes the world's smallest shark: the dwarf lattern shark. Species include the gulper sharks, lattern sharks, dogfish sharks, cookie-cutter shark, and the Greenland shark.


9. Order Pristiophoriformes contains the saw sharks or carpenter sharks. It's members have long, flat, toothy saw-like snouts. They average out at 5 feet long and are bottom dwellers. Their food supply varies between small fish, squid, and Crustaceans. They also give birth to live young. Members of this order include the common sawshark, Queenland sawshark, and knifetooth sawshark.







pictures from: https://en.wikipedia.org/wiki/Tiger_shark, https://en.wikipedia.org/wiki/Bramble_shark, https://oceana.org/marine-life/sharks-rays/shortfin-mako-shark, https://en.wikipedia.org/wiki/Cow_shark, https://en.wikipedia.org/wiki/Horn_shark, https://en.wikipedia.org/wiki/Angelshark, https://en.wikipedia.org/wiki/Zebra_shark, https://en.wikipedia.org/wiki/Greenland_shark, https://en.wikipedia.org/wiki/Sawshark

2018/12/15

Gratitude - 12/15/2018


It's been a busy couple of months. I've spent quite a bit of time with family, getting things started for surgery, working with my advocate for a meeting in March and looking for work. While I have been too busy to blog much, I wanted to sit down and share my gratitude for some blessings today.

1. I was able to sit down and pay bills. Very grateful that I had the resources to pay them.

2. Bug stayed over last night. I woke up early listening to him recite and feeling my body being squished up against Teddy and it was sweet. I am tired, but happy to have the time with Bug. Teddy is such a warm dog that he helps keep me warm too.

3. I have a great quilt. It is thick and warm and with a duvet cover it looks amazing. I love snuggling under the covers when it is cold because I feel warm and toasty.

4. I am grateful for my treadmill. I am able to walk at my own pace when I can and get some exercise in even when it is cold outside. Some days my knees and ankles won't take it, but on others I can just walk at my leisure while watching a TV program.

5. I am thankful for a freezer full of food. Can't be thankful enough that I have good food to eat. Not everyone does and I am thankful.

6. I love coloring books. I enjoy listening to books and coloring. I don't do it very often, but when I need to rest and can't be on my feet I enjoy it more than I would just watching television.

7. I love the Christmas tree. Bug decorated it himself this year and it is just gorgeous. I like taking a few minutes to just sit and look at it. It's a bit restful and wonderful to just enjoy and think.

8. I enjoyed reading on sharks over the last few days. They are one of my favorite species and I have had fun this evening studying and writing about them.

What are you thankful for today?

2017/03/04

The Three Investigator Series - In Order


I loved this series when I was a young girl and I have been re-reading it as an adult for fun and still enjoy them today... even if they 'feel' more simplistic and formulaic to me. I recommend them for children ages 9-13. The series has been written by few different authors; the most prolific are Robert Arthur, William Arden and M.V. Carey. This series had a great appeal when it was originally being written and was translated into several languages and countries. These stories feature three male teenagers who form a club to investigate mysteries they discover in their communities. The boys- Jupiter Jones, Bob Andrews and Pete Crenshaw each have different strengths and knowledge which compliment each other as they work together on the 'puzzles' they discover- their motto is "We Investigate Anything.". Alfred Hitchcock, the famous movie director was also a character in the books as a mentor to the boys in the first two dozen titles, but never actually have much to do with the books- he was simply paid to have his name and image put on them. However, I will admit that I love reading his dialogue with the boys... even if it really isn't his words at all. :)

1. The Secret of Terror Castle
2. The Mystery of the Stuttering Parrot
3. The Mystery of the Whispering Mummy
4. The Mystery of the Green Ghost
5. The Mystery of the Vanishing Treasure
6. The Secret of Skeleton Island
7. The Mystery of the Fiery Eye
8. The Mystery of the Silver Spider
9. The Mystery of the Screaming Clock
10. The Mystery of the Moaning Cave
11. The Mystery of the Talking Skull
12. The Mystery of the Laughing Shadow
13. The Secret of the Crooked Cat
14. The Mystery of the Coughing Dragon
15. The Mystery of the Flaming Footprints
16. The Mystery of the Nervous Lion
17. The Mystery of the Singing Serpent
18 The Mystery of the Shrinking House
19. The Secret of Phantom Lake
20. The Mystery of Monster Mountain
21. The Secret of the Haunted Mirror
22. The Mystery of the Dead Man's Riddle
23. The Mystery of the Invisible Dog
24. The Mystery of Death Trap Mine
25. The Mystery of the Dancing Devil
26. The Mystery of the Headless Horse
27. The Mystery of the Magic Circle
28. The Mystery of the Deadly Double
29. The Mystery of the Sinister Scarecrow
30. The Secret of Shark Reef
31. The Mystery of the Scar-Faced Beggar
32. The Mystery of the Blazing Cliffs
33. The Mystery of the Purple Pirate
34. The Mystery of the Wandering Cave Man
35. The Mystery of the Kidnapped Whale
36. The Mystery of the Missing Mermaid
37. The Mystery of the Two-Toed Pigeon
38. The Mystery of the Smashing Glass
39. The Mystery of the Trail of Terror
40. The Mystery of the Rogues' Reunion
41. The Mystery of the Creep-Show Crooks
42. The Mystery of Wreckers' Rock
43. The Mystery of the Cranky Collector
Extra : The Three Investigators' Book of Mystery Puzzle

If you have also enjoyed this series, which book was your favorite? Any particular critique? I have started to collect the books again and have been introducing them to Bug and hoping he will start to explore them as well... he may not as they do not tend to have enough animals in them. So I'll have to enjoy them on my own. :)





pictures from: http://www.threeinvestigatorsbooks.com/index.html, http://www.threeinvestigatorsbooks.com/Greenghost.html


2015/07/01

Outline of a Shark : The Basic Facts


A bit ago, I was privileged to spent some time with these totally cute little girls that I tend to only see at church once a week. It was a wonderful time had by all I think and I have found I am growing to love these wee ones so much. While I sometimes wish that I had more children, I have managed to find some comfort in caring for other people’s children and trying to help them with their tasks. (I do enjoy going to bed when I want though ;) During our game playing and chatting, the six year old saw a statue (maybe curio is a better word) of a shark on my bookcase- one of my treasured possessions that my sister gave me after she was married. Grimacing, she then told me that she ‘hates’ all sharks because they are always hungry and always biting people. Nothing that I could say could shake that simple foundation of that knowledge. It felt a bit sad because that seems like such a extreme and also mainly unnecessary fear. So, I picked up a few of my books- those who know me tend to know that sharks are something that I enjoy and have been trying to instill that sense of joy and wonder in my son- and we started to read about several different kinds of sharks. She decided at the end of our conversation that we should study all of them- each and every species – so we can decide who is right. A fairly mature response for anyone that age… and a little more motivation than I think I have ;) But we decided to start on the basics. So after about twenty minutes, these is what we came up with. (I have added a few of her comments in bold and parenthesis.)

We started with studying and trying to observe through picture the basic physical design. Some of the characteristics common to all sharks are gill slits on the sides of their heads and a skeleton made of cartilage and connective tissue. Sharks live in all the oceans and seas on this planet and a few species can live in freshwater rivers, although they are in the minority. All sharks have long rows of teeth that are replaced several times over their lifetime- some estimates suggest that some species grow over 10,000 teeth in their lifetime. (WOW!) Almost all sharks have eight fins and no shark has the ability to directly ‘back up’- they can turn around and go back making a u-turn if you will….but it is impossible for them to stop and swim backwards. All have skin that is covered with dermal dentacles that make their skin feel smooth from head to tail, giving them smooth and fast movement through the water. However, if you rub your hands along the skin from the tail towards the head, the skin will feel rough, like sandpaper and can even break your skin open (probably not a great idea around a shark per se ;) Most sharks need to keep moving and are unable to sleep for large periods of time without sinking and drowning; some species have developed the ability to push water past their gills when they are not actually swimming allowing them to remain stationary of settle at the ocean floor. The majority of sharks are ‘cold-blooded’ with large stomachs and short intestines. Their ability to sense smell and follow it as well to sense electromagnetic fields make them pretty excellent predators in the water. Interestingly, sharks have eyes that have the ability to change the size of their pupils (just like us) so while scientists do not understand much about their vision, that is an interesting starting point for speculation. (SO SEE, THEY CAN SEE IT’S A PERSON AND THEY DO IT ON PURPOSE!) They are also colorblind (WELL, I STILL THINK WE DON’T LOOK LIKE A SEAL) and have an average life expectancy of 20-30 years. Like us, they also take a long time to grow and mature enough to have children and they may migrate thousands of miles every year. They are thought to be quite intelligent and have been observed showing curiosity and play like behavior… which reminded me a little of dolphins. (vigorous head shaking!) Only four species have been involved in a significant number of fatal unprovoked attacks on human beings; the (in)famous great white, the oceanic white tip, the tiger, and the bull shark. Ironically, humans as a species kill on average over 100 million sharks a year for both commercial and recreation purposes. As many as one forth of known shark species are threatened with extinction and twenty five species are listed as critically endangered.

Sharks have been living in our oceans since near the beginning of creation – some estimates suggest they existed at least 400 million years ago and in many ways, they still be have and live the way they did back then. The first sharks showed great physical diversity- more than we tend to see in shark species today- and new ‘ancient’ sharks are still being discovered today as paleontologist comb through rocks and ground for fossils. With over 470 species of modern sharks in several classifications, I suspect that we will not manage to study or write about all of them. I think that’s probably reasonable and in the end I am hopeful that her fear and hatred will feel less strong towards them. But we’ll give it a good start and see where we will go from there! Any particular one that you suggest we study first? :)



pictures from: http://oceana.org/en/explore/marine-wildlife/whale-shark, http://www.aquariumofpacific.org/onlinelearningcenter/species/zebra_shark, http://www.mediabistro.com/prnewser/animal-rights-groups-help-inspire-hong-kong-shark-fin-ban_b72810

2011/01/21

New Thoughts on a New Crisis

During the first week of December 2010, parts of the Red Sea played host to a biological murder mystery as well as to a huge amount of unwanted global publicity. As an added 'bonus', the situation almost correctly mimicked a situation in a well known horror book ('Jaws' written by Peter Benchley and published in 1974) which added to the world wide furor.

For those who have not read the novel 'Jaws', it is centered on a killer great white shark. The author Peter Benchley writes about an animal 'impelled to attack', an animal that 'exists on instinct and impulse', 'aren't very bright', and a 'maniac running around loose, killing people whenever he felt like it'. Other quotes include: "There is a creature alive today without passion... without logic... A mindless eating machine. It lives to kill." The plot of the book is fairly simple. A great white shark kills some people in the ocean off of a small seashore town in the northeastern United States. The police chief tries to close the beaches, but is overruled by the local major who is worried about the tourist industry. The beaches remain open and more people are killed by the shark. A shark expert is called to kill the shark and the shark is destroyed at the end of the book. The movie that was released in 1975 is centered around this simplified plot- leaving out the subplots for the most part.

The situation that has recently cropped up in the Red Sea is not really different. A shark- or more than one – attacked four people in two days. All four individuals survived and the local governor (Mohammed Shosha) declared the beaches closed for 48 hours. After two sharks were killed during that time, he then reopened the beaches and declared that the danger was past. True to the book, a woman standing chest deep in water was attacked and died almost immediately. Sharks sightings in this area are rare and attacks are rarer still- while five swimmers were attacked in six days recently, there have been only six reported shark attacks in the last decade in this area until now. The beaches were then closed to swimming and will be indefinitely, and hunters have been out looking for the sharks suspected. The one major twist is that these attacks appear to have been committed by members of the oceanic white-tip and the mako shark population- and add that scientist believe that one specific shark was responsible for two of the attacks- a finding that is unprecedented... well, outside of Peter Benchley's book of course. Add to that the idea that oceanic white-tip sharks are not considered seriously dangerous sharks for people and are not listed in the top killers.... and this story sounds a wee bit scary! The mako shark that attacked and caused the fatality has been caught and confirmed by checking its jaws/teeth. The oceanic white-tip is still at large.

There are lots of theories about why this 'tragedy' happened. There are thoughts that the fish supply is low causing sharks to have to look harder for food. Others have suggested that snorkelers who feed fish illegally are causing the fish to come closer to land... and bringing their predators with them. Other suggestions include the idea that illegal carcass dumping off shore could be conditioning the sharks to find food closer to the shore making humans more at risk. And other theories that are a tad less likely are climate change and possible Isreali plots- I swear I didn't make that up! The only thing that scientists seem to agree on is that these attacks are the result of humans disrupting the environmental balance in the area. My first thought upon hearing about these attacks was that the sharks are having a harder time finding food. It is also telling that the humans were a 'mistake' attack because almost all survived- they were stalked, bitten and then the shark left-recognizing that this wasn't his typical food. (that's a guess) Let's be blunt- if the shark wanted to eat the humans, they would have had no problems doing so and no one in these situations could have stopped them.

A lot of research has been done... and scientists have studied and discovered a lot more information about sharks – not just great white sharks) since the 1974 publishing of the novel that devastated beach tourist areas across the world by causing panic and vacation changes by thousands of people. We know that sharks are not animals that are looking to eat us. We know quite a few facts including

1. Sharks attack in three ways: the hit-and-run, the bump-and-bite, and the sneak attack. The sneak attack is more likely to happen during the time periods of dusk or dawn and also in murky water. The hit-and-run is the most common where a shark sees a piece of us moving (a hand or a foot perhaps) and attacks thinking it is a fish. Realizing that it made an error, the shark lets go and leaves most of the time. The bump-and-bite is the most dangerous as the shark bumps you to see what you are... and if it decides that you are food will attack wholeheartedly.

2. The three sharks that are more likely to attack humans are the bull shark, the great white shark, and the tiger shark. Each of these sharks have different behavior patterns, a different diet, and a different way for attacking prey. For instance tiger and bull sharks tend to hunt at night while great white sharks tend to hunt during daylight hours. Bull sharks are also more likely to attack in shallow water and by far are considered the most aggressive.

3. The most dangerous to humans is the great white shark which, while usually spitting out promptly its mistaken bit of human flesh, leaves huge bleeding wounds on its victims. The great whites that attack human tends to be in the 8'-12' range in length leading to speculation that they are inexperienced juveniles still figuring out how to hunt for the seals they prefer.

4. We are more dangerous to sharks and humans kill thousands for sport and food every year.

5. Some sharks travel thousands of miles and some have been known to travel 1800 miles in a six month period. Very few are thought to be territorial.

Peter Benchley himself felt some responsibility for the negative attitudes that the general public felt about sharks that he felt were created due to his book. He later in life became an ocean conservationist and in 2000, he wrote: “considering the knowledge accumulated about sharks in the last 25 years, I couldn't possibly write Jaws today ... not in good conscience anyway. Back then, it was generally accepted that great whites were anthrophagous (they ate people) by choice. Now we know that almost every attack on a human is an accident: The shark mistakes the human for its normal prey.”

What happened in the Red Sea attacks is a tragedy and frightening to think about. We as human beings man never know why the sharks attacked, and why such an infrequent thing happened so many times in one short time frame. What we can do is try to figure it out and change our behavior. For certainly, it seems very likely that no matter what the cause, human beings helped cause this tragedy. Blaming or demonizing the sharks will do nothing positive and has the potential to cause even more ecological imbalance as in our fear, we kill any shark we can catch. I hope that the families are receiving the help that they need to grieve and recover and that the victims are safe and recovering as well. But I do hope we see this as a lesson that we can attempt to learn and not as another opportunity for fear and murder. Our Heavenly Father loves us... and the sharks... and the earth. May we remember that... and that we can coexist... together.

2010/07/21

What a Difference Photo-Shop Can Make....


So, I ran across a really freaky picture the other day online. It is a picture of two teenage scuba divers waving to someone while swimming in the depths of the ocean and right behind them is a huge shark- in comparison to them it is simply monstrous. First I felt a ripple of fear and then annoyance- first because I realized that I recognized the picture which is a beautiful picture:


Second, because while I could see the humor, it is definitely set to (at least subconsciously) help others continue to fear sharks in an irrational manner. Your first thought is that immediately after this picture was taken the shark sneaked up quietly and viciously attacked the teens, killed them, maybe ate them and then casually swam away. (maybe even smiling and using a toothpick to clean his teeth while leaving) The only other explanation I could think of was that the 'artist' was trying to make fun of the boys in the picture, or he was …. any ideas out there?

So I took a few minutes to look up the original photo above and to see what different people had done to 'change' it. Here are four examples I saw of the same picture with some humorous wording or drawing on it.










Even the 'light humor' ones sort of felt uncomfortable because even they seem to suggest that sharks in general or the great white shark specifically 'think' like us. So that when they kill us it is because they thought about it and decided to kill us- not that they became confused or even that we put ourselves at higher risk than we needed to. I realize that some people really believe this to be true- one website that was discussing saving sharks had a comment on a post that said “Why should we save sharks – isn't it like saving a convicted murderer so they can go out and do it again?” (I swear that is the verbatim quote) The illustrations added to the picture seemed to me to be a person either trying to make fun of his fear or trying to make the object of his fear look ridiculous and not worthy of respect. (I will admit that was my reaction and might not be the most consistent or correct reaction.)

But these next ones are just bad. They seem to have been developed as a form of humor- but not a benign sort of humor. The first picture is the one that sent me on this rant/discovery.




This humor whether intentionally or not puts all sharks at risk from us as they heighten our fear and help confirm our ignorance of them. Fear comes out of ignorance as well as biology. The more ignorant we are, the more we will fear and the more likely we are to try and dispel our fears -not through knowledge- but with violence and bloodshed.



And in some ways it is a lie. A beautiful picture of a swimming shark becomes something more. And the something rarely tends to be focused on the positive side.













Besides the first picture, I only found one that could be construed as still beautiful after modification were added- makes me want to see the movie :)


So maybe I do not understand all the good uses of photo-shop. I haven't seen very many pictures from photo-shop that have taught me anything although I have gotten a decent laugh from a few... It sometimes seems like photo-shop was developed so that individuals can unleash their prejudges, fear and anger on others. I know that photo-shop is only a tool- and tools do different things in the hands of different people. And I would love to see more good examples of photo-shoped pictures. It just seems when it comes to things we fear or find repulsive such as sharks, photo-shop is only used to perpetuate negative stereotypes and poor humor.

The original photograph is beautiful in my mind. It shows an animal that is its own being- it is not an animal that we control. It is an animal that follows the laws that Heavenly Father and evolution have set for it. It commands respect and is not tame- nor should it be. So many people love the 'tame cute' animals and fear those those don't fit that mold – by the way, for full disclosure I LOVE the 'tame cute' animals so much so that I am constantly having to remind myself that there is only so many I can own and still have room for my family... (unfortunately, I am only half kidding :) There seems to be a human trait to either 'tame' our fears or destroy them. C.S. Lewis even mentioned in his books that we Christians try to see Jesus Christ and the Father as 'tame' beings.... Any one have any ideas on how we as a race can change that? If we could answer that question, maybe we could find world peace....

So just to be a little hypocritical, I will end my post with a piece of photo-shop. But it is the first piece that on reflection... I think I have understood and feel like it said something sort of useful. :-D

2010/06/24

The 'Worst Shark Attack Ever' - An Example of Human Failure and an Easy Scapegoat


"I thought that I had done everything I could, but maybe I could have done more" - from an interview with a survivor of the U.S.S. Indianapolis

The most famous of all shark attacks occurred in July of 1945. I must start by saying that as much as I love sharks.... as much as I am fascinated by them... as much as I would dearly love the opportunity one day to face one and watch one swim in its habitat.... this story brings tears and horror to my heart. I can not even attempt to imagine the fear, the waiting, and everything that the survivors faced. In many ways, those that died were so lucky in that it ended. I cannot imagine endless hours of heat and water and sun and then hours of cold and water and dark interspersed with no food and no water and no way to calm the thoughts in your head. I am not good at that anyway - despair has become so easy over the years of trial and turmoil. And in many ways, those that died took the easy way out for those that survived have so much to teach us. And we have so much to learn. And so little of what we have to learn was about sharks. This may be known as the most famous shark attack in history, but so little of its lessons are truly about sharks. They are more about us and the frailty and courage of the human spirit. They are about how humans think and how we react to adversity.

The U.S.S. Indianapolis delivered an atomic bomb and while on its way to meet up with some other ships, it was hit by two Japanese torpedoes around midnight. The ship sunk within 12 minutes with only 900 of the men aboard able to get off out of 1196 total. By dawn of the next day, sharks had begun to appear. There were very few rafts so most survivors were in life jackets that were designed for about 72 hours worth of use. The survivors were in the water in groups (slowly drifting) for four days and five nights before rescuers came. Some groups did have shark attacks- others never saw a shark attack a living human at all. All thse survivors had to deal with the extreme heat during the day, cold during the night, and the constant exposure of both with little food or water if any. By the time that the rescuers showed up only 317 men were still alive.

The first two hundred deaths are believed to be from injuries caused from escaping the sinking ship. Donald McCall, one of the survivors, when interviewed discussed the pain of jumping from the boat to the water... 60-70 feet below him. He felt that 'his body was being torn in half'. With that many dead people around as well as the living, it is not surprising that sharks did come to investigate. And with only a few exceptions, the sharks were content to eat the dead. After a day or two the sharks were less shy and were willing to try and pick off people on the extremities of the groups. However, it is believed that only about two dozens deaths could be attributed to shark attack (out of almost 900). After the first deaths from injuries sustained from evacuating the ship, the men died from numerous complications. Some died from giving up and drinking the sea water- they would usually die within about five hours sometimes with an hour or two of delirium and hallucinations. Some men got hallucinations and delusions from the extreme exposure, stress and fear. Some crew members died from being attacked by their own groups as members would have hallucinations and fight the people around them or sometimes fights would break out as people attempted to stop other men from drinking the sea water. Disillusionment would also cause fights and contributed to a high level of injury or even death. While some groups did have problems with sharks, others such as the group that was held together by Dr. Hanes lost 300 men to death, but none of the deaths was due to shark attack. George Burgess, a shark expert and the director of the Florida Program for Shark Research from the University of Florida, studied and interviewed as many of the survivors as he could. His estimate is about 12 dozen deaths from shark attack, 500+ from exposure, drowning, salt poisoning, etc..., about 200 from initial evacuation injuries and the remainder of death are attributed to the men who were unable to get off the ship. So while this naval disaster – the worst naval disaster ever in U.S. History- did have problems with sharks, the tales of 'mass shark feeding frenzies' are truly over exaggerated. George Burgess states that in doing this research, he discovered that the 'sharks behaved the way sharks are supposed to behave in their natural environment'.

Unfortunately, the rescue of these men doesn't end the sad and horrifying tale. Later it was discovered that the Navy command knew that this ship was missing and did nothing. They received the distress signal and did... nothing. The survivors were spotted four days later on accident by a passing plane. The public announcement of the disaster was made two weeks later- politically timed to be overshadowed by the announcement of the Japanese surrender. The Captain of the ship, Captain McVay, was then blamed for the accident and court martialed. Later evidence was released that showed he was a scapegoat and that others sent his ship out knowing that the area was not safe, refused his requests for a safety escort, and later ignored evidence in his favor to allow for his successful prosecution. (In 2000, the Japanese commander of the submarine that sunk the U.S.S. Indianapolis and who was a witness as McVay's trial said of the trial - "I had a feeling it was contrived from the beginning." This trial effectively ended his career, but did not end the hate mail and painful phone calls dealing with this event. In 1968, Captain McVay committed suicide with his Navy-issued revolver. Not until several years later, did declassified documents show not only his innocence, but the true and horrifying failures by the Navy mentioned above. In October 2000, President Clinton signed a resolution passed by Congress that ...Captain McVay's record should state that "he is exonerated for the loss of Indianapolis."

The stories of the survivors are of personal courage, fortitude, perseverance – not just stories of sharks and what they do. And the lessons of politics, betrayal, and sacrifice are lessons that we need to keep in mind today as we watch our politicians make decisions for us. We need to remember that sometimes, decisions are made that are truly what is best for the well placed minority and not for the majority of individuals... that many individual lives can and will be sacrificed to make one individual's living easier and more comfortable. That should never be tolerated. In the end, the largest shark attack ever was truly the fault of humans. And was compounded by human error, selfishness, and dishonesty. May all of us take a few minutes to sit and remember those that died and remember their suffering...as well as the suffering of those who lived and pledge to help alleviate suffering that we see in the other people that surround us. Let us remember that human failure accounts for much suffering. Let us remember that we have the power to help. No one else has the power that every individual holds in their own hands. Make it count!

2010/06/23

The Predictability of Shark Attack



If there is anything that is predictable about sharks, it is that every attack no matter how 'minor' will be reported in full and chilling detail (if detail is not available, supposition seems to sometimes be used by media outlets, observers, medical providers, etc...). The larger it is, not only will it be reported on in great detail, but the stories will become legend and the facts and gossip will continue on to be discussed, dissected and embellished until the attack itself seems to be something out of a nightmare and not what it most likely is... a human being who has entered another environment that is not his native environment and (in most cases) has broken some basic rules that make them a more likely accidental target.

Our planet has billions of people that thrive and move on its surface- the numbers who will ever be party to a shark attack are so small and the number of people that will die from such attacks are extremely rare. Unlike how the media tend to portray an attack, a shark rarely attacks a person because the shark has determined that that the prey is human, edible, and then it attacks for its dinner. Instead, a shark bites because it is curious, confused, or distressed. Like the small baby puppy you bring home who chews on everything (including you) to explore its world, a shark explores much of its world through its skin and mouth. It has no hands and does not breathe air. In most ways, a shark has not changed evolution-wise in millions of years. It swims and hunts for food as, like us, a shark cannot concentrate on leisure until its basic needs are met. And a shark has a very simply brain. It is a strong and powerful collective myth that teaches us to anthropomorphize sharks- to believe that they think like us and feel like us... and therefore since they bite and they attack out of nowhere and the dark depths of water that they are evil, angry beasts. This attitude allows us to feel adversarial towards them and also justify what we do to them in our fear.

There are around 440 known breeds of sharks. They vary in size, shape, behavior, territory, and food consumption. However, a short poll on the street will find that most individuals know two hard facts about sharks. They will know maybe one of two breed names (usually tiger shark or the most popular great white shark) and they will know that sharks kill you and many people die per year. While I cannot say that the breed names are incorrect, the generalization of 'lots of people' or 'tons of people' simply doesn't consist with the facts. With very few exceptions, out of the millions of people that go swimming in the ocean every year all over the world very few people will ever see a shark in its natural habitat let alone be injured by one. As far as I can discover, these are the attacks across the entire world in the last month.

1. In May, a man in Australia was knocked off of his board and bitten on his leg. The breed of shark is unknown and he (the victim, not the shark) is in good spirits.

2. On June 10th in Florida, a young women was bitten by a shark while playing on a boogie board- she received 29 stitches. The breed of the injurious shark is unknown and her bite appears to be 'exploratory' – an 'oops' as a shark showed interest and then realized that she was not anything that he had interest in.

3. On May 18th, two women were bitten by 'a fish' while swimming off a beach of Vietnam. They were led to shore and given medical care. Her injuries are similar to those previously inflicted by sharks.

4. In May, a man was surfing at Point Plomer and he was bitten by a bull shark on his leg. He was treated by a paramedic and he walked away with no major injuries. There was a lot of fishing going on and it is believed that the bull shark was chasing the fish.

5. On April 13th, a young boy was bitten on his leg in Port Alfred, South Africa while surfing. After some surgery he returned home.

All of these attacks were tragedies and scary and painful for those involved. I am not suggesting that because shark attacks are so rare that they are not serious and important to the parties involved. They are also sometimes fatal. But across this vast world, only a handful of people have been attacked by a shark in the last month or so and all have survived. All were swimming in conditions that are considered by most scientists to place them at a higher risk of a shark attack- murky water, in the water with a shark's prey, and swimming early in the morning and during dusk. These conditions are much more likely to cause confusion to a shark and make him more likely to make an exploratory bite. Make no mistake, the fact that these people are still alive and pretty well is because the shark was not all together serious about eating them. The shark recognized that what he bit into was not his usual fare, was different... and possibly other explanations that I can not fathom- in a way I am anthropomorphizing too. :) This year there has been only one documented death which occurred February 3, 2010 to a man who was kite surfing in Florida. He died from blood loss due to the bite he sustained from a bite to the leg.

So while the majority of people believe that sharks and shark attacks are numerous and unpredictable, this is not statistically the case. In fact, in many ways sharks are very predictable. If you swim with seals or in schools of fish, then you are likely to be attacked. If you swim in dirty, murky water- especially when the sky itself is not bright and sunny, then you are at a great risk of a shark sensing your presence and becoming curious about what you are. It can not see you so it will check you out ...with a little bite. With the millions of people who use the oceans for recreation and for a livelihood, numerous is a vast exaggeration. In fact, there is some evidence that shark attack numbers are going down. Some scientists suggest that the numbers are going down due to fewer people traveling to beaches because of the recession. Others suggest that sharks have been hunted by humans too harshly and there are not as many sharks out in the oceans for human beings to intersect with. The numbers of many large shark species have declined by more than 50% due to increased demand for shark fins and/or meat and tuna and swordfish fisheries. (millions of sharks are taken as bycatch each year at these fisheries) Some large shark species have been estimated to have losses at over 90%. So sharks clearly have much, much more to fear from us than any of us do from them.

So when you go to the beach this summer, and look down at the water, before you jump in.... take a moment to remember your place in this world. Remember that Heavenly Father has given us righteous dominion over the land and the animals, but righteous dominion is no guarantee. Remember that we are visitors here (especially in the ocean) and that our Father loves all of his creations and all of his creations have a place and a purpose. Just as we do.

2010/02/10

How to Save an Apex Predator... and in turn, Save Ourselves


Article of Faith 13: “We believe in being honest, true, chaste, benevolent, virtuous, and in doing good to all men; indeed, we may say that we follow the admonition of Paul— We believe all things, we hope all things, we have endured many things, and hope to be able to endure all things. If there is anything virtuous, lovely, or of good report or praiseworthy, we seek after these things.”

In some ways, the title of this post is an oxymoron. An apex predator is by definition a “predator that have virtually no predators of their own, residing at the top of their food chain.” So it begs the question of why an animal that has 'virtually' no enemies needs to be saved in the first place...? How did the great white shark find itself in the exalted position of 'king' of the seas and yet be in in such risk of extinction?

The answer is very complicated. One reason appears to be simple biology. Any predator reproduces at a slower rate that a prey species and the great white shark is no exception. The female great white will not become pregnant until she is at least 4-5 meters in length (thought to be reached around 9 years of age). She will then give birth to 2-9 pups and will not become pregnant/ give birth again for at least two years – it is also thought that the larger pups in the sharks belly will eat their weaker siblings so that only a few will actually be born. On average, a female great white shark will give birth only twice in her lifetime... although so little is known about the breeding of great whites that these numbers could be incorrect. However, if we assume the very best situation and every pup survives that is born, this shark has very little leeway to be able to keep its population steady if anything else happens that could potentially adversely affect its population.

Unfortunately, there are a few other adverse situations that happen with great white sharks. Sharks are prized for their jaws, teeth and trophy status to sportsmen and targeted fishermen. They can become trapped in protective beach meshing that has been set up to protect us from them (when they become trapped, they will suffocate within minutes. The sharks are also at risk of dying after being caught during commercial fishing for other fish. They also have the problem that inshore habitats that are commonly used by adult great whites as birthing and nursery areas are becoming degraded and in some cases taken over by another apex predator -man. Shark fins are prized for food and hundreds of sharks are killed each year after they are caught, their fins removed, and then they are dumped back in the ocean where they die as they can no longer swim or catch food. When they are caught and kept, their flesh is usually sold under the name of smooth-hound shark. Shark cartilage is sold as a 'health' food and their skin is used for leather. Some great whites are even caught to be prominently displayed in large aquariums. And some are killed as a byproduct of media frenzy and fear/revenge after a human is attacked by a shark while swimming or surfing- even if the shark involved was definitively not a great white shark. On average a shark will kill five human beings a year on accident while human beings kill hundreds of thousands of sharks a year.

When it became apparent that the great white shark was in serious danger of extinction, some governments passed laws attempting to help protect them from humans. In 1991, South Africa granted the great white protected status and was followed by California and Australia in 1994. The World Conservation Union considers the great white shark as 'vulnerable to extinction'. Many scientists believe that there are less than 10,000 great white sharks left in the oceans. They are protected under at least three international conservation agreements and since 1994, they are fully protected in Namibia, the Maldives, Malta, and Florida.

So, with all of this information... what can we do to help the sharks survive? One thing is to educate yourself and others about sharks. Unnatural fear can only be combated and abated with knowledge. If the majority of people understand that shark attacks are rare and killing sharks because “they are sharks” is wrong and unacceptable, media reactions will go down and people will be less likely to go out and indiscriminately kill them. Do not buy shark products and, if enough people do not buy them, then they will become less valuable and fewer sharks will be killed for necklaces and trophies. We need to work harder to keep our beaches clean and unpolluted so that breeding and nesting areas are available for sharks to use.

By now, you are probably wondering why I would suggest that saving the shark has anything to do with saving ourselves. In Mormon terms, we believe salvation is attained through a combination of faith in the Atonement and good works, with emphasis on the good works. Many people tend to be fairly 'species-ist' and believe that because we are 'made in the image of God', we are more important than any of our Heavenly Father's creations. However, the scriptures tell us that the Father notices death of a sparrow (Matthew 10:29-30)... How can we decide that our fears are more important that a creation of our Father? How can we allow one of his creations – an entire species- to die for poor reasons; our fear, our ignorance, our lack of concern, and our lack of will? How can we allow our fear to overshadow the beauty and majesty of this animal. And what will happen to us and our world without the great white shark? Will our oceans become barren as the the great white's prey explodes and eats the fish to an unsustainable level? Will we have to put fish on an endangered species list and no longer be able to eat is as a healthy meal? Will other predators take the place of the great white shark that might become even more dangerous to us in the future? Would the oceans become a truly dangerous place for us to swim in or enjoy?

***** On a slightly different note, I believe (my belief only) that the more we human beings dive in cages to see sharks, the more sharks become 'used to us'. I believe that sharks are more likely to attack people when they are more comfortable in doing so- predators tend to not attack other predators due to fear of injury). The more accustomed they are to our presence in deep water (and our 'calling' them with blood), the more likely we are to convince them that we are a tasty and easy treat. And it is more likely that the 'man eater' will begin to eat us instead of our usual cases of mistaken identity. The recent shark attack in South Africa is in my mind as I type these thoughts. *****

It is in our interests- both temporally and spiritually- to help save the great white shark.. Of course this is only my opinion.... What do you think?

2010/02/08

Challenges of an Apex Predator: The Great White Shark and our Ecosystem



Yesterday, I asked the question: which is the most frightening apex predator? The choices that I brought to the discussion were a great white shark or a human being. My thoughts lean towards human beings being the more dangerous of the two groups. In this post, I want to take the time to introduce the great white shark as an unique and beautiful creation, look at the differences between great white sharks and the other shark family members, and how the great white shark interacts with his environment and its inhabitants.

The members of the shark family are different from most other animals that live in the ocean due to their lack of a bony skeleton. Instead, sharks have a cartilaginous skeleton which gives them an advantage of a lighter weight physique. They have jaws that do not attach to their cranium which allows greater range of movement, teeth that are continuously replaced with the advantage of always having a strong weapon for catching prey, and their bodies and skin are developed for easy movement and speed in water. One disadvantage to not having bones is that the shark is not able to swim backwards- only forwards or to the side. Sharks also have the disadvantage that they have problems with buoyancy- a very fatty liver helps to keep them from sinking, but most sharks need to stay in constant motion so that they do not sink, and also to breathe as they need the water to move through their mouths to their gills so that they can breathe.

Sharks have a very long history on our earth. Sharks are believed to go back hundreds of millions of years and modern shark ancestors are believed to have begun around 100 million years ago. One of the great whites well known close ancestors was C. Megalodon, a shark that is believed to have gained lengths of 100 feet (In fact the great white is C. Megalodon's only surviving close relative although this is relationship is not agreed upon by all scientists and is a subject for much debate.) The great white shark in many ways physically looks like its past ancestor -whether they have behavior in common is still debated by scientists.

The great white shark has a few traits or behaviors that are unique in comparison to its other shark cousins. The great white shark can hold its head out of the water- out of hundreds of sharks, only one other shark can do so the same. The great white shark wins hand down on the claim of being the world's largest predatory fish. Great white sharks are also different from other sharks in terms of their fins, conical nose, and distinctive coloring. It is one of less than a handful of sharks that have been documented to attack humans – not that that is a great distinction!

The great white shark is a very important and vital part of the ocean's ecosystem. As an apex predator, they feed on a large number of invertebrate and vertebrate animals - examples are sea lions, seals, other sharks, rays, whales, small cetaceans, etc... As an adaptable animal, its diet can and does change with its environment so studying the shark's feeding habits are difficult at best. Because the great white shark is the 'top dog' of the seas so to speak, its importance to the oceans and to our world cannot be overstated. If the great white shark was to become extinct, it could lead to huge increases in its prey populations which in turn will cause changes in many other animal and plant populations. And unfortunately, this shark is currently endangered and runs a real risk of extinction in the future.

So, you ask, why have I possibly bored you with all this information about a animal that at best you have never seen and know very little about? Why defend a creature that seems to have so few redeeming characteristics to the majority of the human population? A few ideas are listed above. In the last installment to this post, I hope to answer this question fully and also hope that I can instill a sense of concern if not urgency for the endangered species of the world which struggle and for the sanctity of life that I believe in.

2010/02/07

Which is the Most Frightening Apex Predator: The Great White Shark or Man?


(This post is part of a three part series which will attempt to address our relationship with sharks, why we fear them, how we can save them, and why we should!

Apex Predator- (also known as alpha, super-, or top-level predators) are predators that have virtually no predators of their own, residing at the top of their food chain. Apex predator species are often at the end of long food chains, where they have a crucial role in maintaining the health of ecosystems.

In the last month, there have been two very highly publicized and sensationalized shark attack/ fatalities. In Cape Town, South Africa on January 12th, a man named Lloyd Skinner was killed by a 'dinosaur sized' or 'gigantic' shark that is believed to have been a great white shark. In Stuart, Florida on February 3rd, a kite surfer named Stephen Howard Schafer died from injuries sustained when he was attacked by a shark that was originally reported to be a 'great white' shark who attacked in a 'multiple shark attack' or from 'a herd of sharks'.

Sharks are in the mind of most human beings to be the ultimate predator. It you ask people what animals they are frightened off, very few off the top of their heads name lions, crocodiles, etc... Sharks are the most frequently mentioned and great white sharks are the most accused and feared. Why this fact is seems to have many factors. Some factors are education/history (except for brief moments in some biology classes, the tales were hear from the past are not positive toward sharks), biology or natural survival instinct (fear of the unknown, the dark, 'monsters' and being eaten alive are all biologically ingrained fears), media (sharks are routinely stereotyped and villianized in most media sources and these sites sometimes actively push humans toward fear and loathing – remember “Jaws”) and control (as human beings we are fascinated and repulsed by things that we cannot control or will not bend to our will.) So, as long as humans have used the sea, sharks and man have had the potential to collide with negative results for either party.

So I ask the question: Who is most dangerous... the great white shark or man? To me, this question is so much more complicated that it sounds. Any apex predator is dangerous and certainly you will not find me trying to make an argument that sharks are not potentially dangerous to us. Sharks have instincts, are carnivores, and roam the seas looking for food and sometimes to breed. They have large teeth, are very 'curious' creatures, can sense even minute amounts of blood in their 'air' and are frankly quite formidable in the sense that they can move quickly and silently in their environment. The are also the larges predatory fish in the sea. The idea that they have flexible territories so more than one shark can exist (and do) in coastal areas adds to the risk. A great white shark is a predator and while humans are not their preferred food, shark attack numbers go up as more and more people enter a sharks environment. After all, we as humans need to remember that the seas are a shark's home and its domain- we are the visitors.

Humans are also an apex predator. We rule the land we inhabit. Other animals may question this fact, but few human beings could disagree with this assessment. We move other animals out of their habitats and take the space for ourselves. Humans mold the land into the image and shape they want for food, transportation, habitation. We move rivers, carve mountains, and sometimes change the entire shape and ecosystem of an area with man made inventions such as a water dam. We kill animals who live in our territories deliberately if they cause us difficulties or annoyance, and unintentionally by our daily activities. Land is our home territory and over the years (with few exceptions) we remind all others living that we are the supreme apex predator.

I believe that human beings are a much more dangerous predator than the shark for three basic reasons. The first is that the great white shark may change the borders of its personal territory, but as a species, it never pushes past certain borders and certainly has never found the way to leave it's environment and continue to live. The shark, no matter how it is feared, cannot leave the ocean so we can control how often we put ourselves into their territory. However, human beings have taken over may portions of territory previously denied to us- the air and the sea for starters. The shark has his tools or weapons- they have changed little over thousands of years. Our weapons have changed greatly over the years and allow us to kill the shark with very little risk to our own personal safety. Another concern is that great white sharks are not interested in us as human beings or predators. Human beings are too bony for a good meal and unpredictable. So while a shark may bite us out of confusion or curiosity, usually one bite is enough for the shark to find the human unappetizing and he is off to hunt something else. Humans on the other hand, are perfectly willing to hunt sharks for food or simply for 'sport'. We will carefully bait them and after tricking them into a trap, we will kill them as trophies or simply for 'a good weekend'. The last reason I believe that humans are the most dangerous predator is that we seem to be one of the few predators that is not on the 'endangered species' list. As human politicians and scientists debate global warming and growing populations, biologists and marine scientists watch with growing alarm at the rising number of animals that need to be listed as endangered or even extinct. While their voices are not quite unanimous, their voices cry that we are the animal that is causing the harm.

So this is my opinion... What is yours? Which apex predator do you think is more dangerous... us or them?