Showing posts with label endangered. Show all posts
Showing posts with label endangered. Show all posts
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
2015/04/19
Thoughts on Ted.com.... and the Intelligence of Crows
So I searched the Ted site for a bit before I found one that I really wanted to watch. I started with a video on vultures that you can find here…. Which was wonderful! It was called “Why I love vultures and the talk was given by Munir Virani and lasted 6:38 minutes. If you are feeling cynical about politicians and politics these days, watch the first few minutes of it for a great laugh. :) I didn’t know that vultures were endangered as I have thought they really sort of had a niche in the environmental. Knowing that we as human beings are poisoning them feels a little sad and weird. I felt a little motivated to do something, but I also wasn’t really sure what I could do besides maybe writing a letter. I saw a turkey vulture by the side of the road a few months ago and it was the highlight of my day. While they are not the prettiest little things, they are pretty cool.
The next one I watched for fun was given by Joshua Klein and was on the intelligence of crows. It was ten minutes long…. Joshua studied crows for years and he built a vending machine for crows. It’s really quite cool and I want one because I look watching crows. We had a pet crow for a little while when he was injured in the wild and I have a short video of it if anyone wants to see it. The video was fourth down on the same page as posted above and he talked about how a lot of the animal conversations these days tend to focus on animals that are becoming endangered and not on animals that are hyper adaptive and are doing well with us in their environments and in fact have adapted to use us in their environments. Talking about developing mutual beneficial systems and ideas on it was great and I have posted the video to my Facebook page.
Here is the page I found both of these on. I am going to watch some more of them. I think this is a site I will visit more over time...
What are your experiences with this site? I even found John Dehlin on it.... it has alot!
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

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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?
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