Saturday, November 20, 2010
Apparently sharks like to have fun too. Just watch this Spinner shark having fun in this video!!:
You are probably wondering like I did the first time I saw this video, why would a shark spin like this?
Is it just having fun, being a shark or is there some reason which shark experts who have watched these sharks for long periods of time, come up with for this behavior of these sharks?
The answer is: "While feeding, the spinner shark uses a leaping and spinning technique to catch fish as they break the surface of the water while passing through a school of swarm fish."
source:http://www.wisegeek.com/what-is-a-spinner-shark.htm Scientifically this behavior has been described as follows:
"It has an unusual method of feeding, swimming rapidly through schools, spinning along the axis of its body. The shark snaps in all directions at the quickly scattering fish, followed by leaping out of the water. This feeding behavior has also been reported for the blacktip shark (C. limbatus), although to a lesser degree. During feeding and scavenging events, spinner sharks sometimes form aggregations. These sharks have been also reported to scavenge discarded fish from fishing vessels."
The spinner shark is not aggressive when it comes to human contact and will not attack unless provoked.
This species of shark has a scientific name of , "Carcharhinus brevipinna, and is found in subtropical waters between 40°N and 40°S near continental and insular shelves. The genus name Carcharhinus is derived from the Greek "karcharos" = sharpen and "rhinos" = nose.
Spinner sharks inhabit waters between 0-100 m. It is a highly migratory species in the Gulf of Mexico, where it moves closer inshore in spring and summer
months to reproduce and feed." sources :http://marinebio.org/species.asp?id=492 and
"Due to the fact that this shark is frequently captured in the commercial and recreational fisheries, it is highly vulnerable to fishing pressure. In addition, the spinner shark utilizes inshore waters as nursery areas making it also susceptible to habitat alteration from development of shoreline areas."
"The spinner shark species is currently listed by the World Conservation Union (IUCN) as "Near Threatened" throughout its range and "Vulnerable" in the northwest Atlantic Ocean. The IUCN is a global union of states, governmental agencies, and non-governmental organizations in a partnership that assesses the conservation status of species." (source:http://www.flmnh.ufl.edu/fish/gallery/descript/spinnershark/spinnershark.html )
It certainly would be a shame if this amazing shark was fished into extinction! Here is a photo of a spinner shark caught during one of its amazing spins:
Source of image:http://www.nileguide.com/destination/blog/files/2009/08/spinner.jpg
I hope you now find this shark as interesting as I do! This shark certainly deserves the right to live in the oceans, so please do not engage in overfishing if you chose to fish out there in our World's waterways and oceans.
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Thoughts worth thinking about
Laws alone can not secure freedom of expression; in order that every woman and man present their views without penalty, there must be spirit of tolerance in the entire population.- Albert Einstein Too often we underestimate the power of a touch, a smile, a kind word, a listening ear, an honest compliment, or the smallest act of caring, all of which have the potential to turn a life around. - Leo Buscaglia
A person's true wealth is the good he or she does in the world. - Mohammed
Our task must be to free ourselves... by widening our circle of compassion to embrace all living creatures and the whole of nature and its beauty. -Albert Einstein
The best way to find yourself, is to lose yourself in the service of others. - Ghandi
The unselfish effort to bring cheer to others will be the beginning of a happier life for ourselves. - Helen Keller
Aim for success, not perfection. Never give up your right to be wrong, because then you will lose the ability to learn new things and move forward with your life. Remember that fear always lurks behind perfectionism. Confronting your fears and allowing yourself the right to be human can, paradoxically, make yourself a happier and more productive person. - Dr. David M. Burns
Life is as dear to a mute creature as it is to man. Just as one wants happiness and fears pain, just as one wants to live and not die, so do other creatures. -His Holiness The Dalai Lama
Mankind's true moral test, its fundamental test (which lies deeply buried from view), consists of its attitude towards those who are at its mercy: animals. And in this respect mankind has suffered a fundamental debacle, a debacle so fundamental that all others stem from it. -
Milan Kundera, The Unbearable Lightness of Being
The worst sin towards our fellow creatures is not to hate them, but to be indifferent to them. That's the essence of inhumanity. -George Bernard Shaw
Ego's trick is to make us lose sight of our interdependence. That kind of ego-thought gives us a perfect justification to look out only for ourselves. But that is far from the truth. In reality we all depend on each other and we have to help each other. The husband has to help his wife, the wife has to help the husband, the mother has to help her children, and the children are supposed to help the parents too, whether they want to or not.-Gehlek Rinpoche Source: "The Best Buddhist Writing 2005 pg. 165
The hostile attitude of conquering nature ignores the basic interdependence of all things and events---that the world beyond the skin is actually an extension of our own bodies---and will end in destroying the very environment from which we emerge and upon which our whole life depends.