Shark’s Electroreception
Like many fish sharks also have another sense, a sixth sense, which we don’t know much about. They are able to detect tiny electrical impulses in the water. As all animals produce some electrical signals this can be very useful! They can detect movement in the water from hundreds of meters away. They can pick up electrical signals generated by their prey, making it possible to feel other animal movements.
This sixth sense is made possible thanks to electro-receptive organs called Ampullae of Lorenzini. These were discovered only recently. The Ampullae are jelly-filled pores. These pores are located all around their heads with a greater concentration around their snouts and are connected to the brain through nerve endings. Basically, these ampullae are electrical field-sensing devices. Every living creature produces an electrical field which sharks can detect.
Strangely enough, a shark will sometimes attack a metal object. This is because, in salty seawater, metal gives off electric signals, which confuse the shark into thinking it is prey. This means a shark cannot only detect its prey but a diver or potential hunters without seeing them.
Shark is a kind of fish that is protected. You can find them on places like sea world. They take care sharks, of course unlike birds, dogs, cats or goldfish, sharks have special needs. Got interested with shark and other fish? Well you should, because fish are fantastic animals and you can have them as your pets.
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Shark is a wild thing
we know that sharks live in wilderness. the ocean is a wet jungle and shark is one of predator that is unique and endangered species. it’s not like other fish, shark has become a great influence in human businesses. the researches and entertainments found that shark is very unique and has high commercial value. we find many movies with shark in them and it’s still attracted us to go to cinemas watching them. the researches about shark has develop into various aspects, even such as cosmetics and food.
for some people,shark is described as power and speed. it represents what we want to be. and some people try to keep sharks as their pets. nowadays researches help us to keep shark in special conditions, and put shark on aquarium isn’t difficult for now. but, imagine that you have a huge aquarium at your house with a shark in it. it looks cool ,but soon we will find it’s ridiculous. shark is no longer happy in that condition.
some of us have cats, birds, dogs and other small pets in our house. if you have shark in your house,then you are supporting shark’s extinction. to keep the shark live,we need the biggest aquarium on earth,that is ocean. the ocean provides the shark’s needs,including food and shelter. we can only observe them and leave them live peacefully. the shark is one of ocean’s wonders that we must keep in order to show our pride to the next generation of humankind.
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Shark Products
Over 100 million sharks are killed annually. Partly because of their fins for shark fish fin soup, as bycatch in up to 40 miles long drift nets of enormous fishing fleets, for medically completely ineffective cartilage powder or by the destruction of their habitats.
You will find shark products often at unexpected places as in restaurants, snack bars or supermarkets. Shark meat is offered also under various other names as Smoked Rock Salmon, Smoked Dogfish, a component of Fish & Chips or Imitation Crab Meat (Surimi). Also the worldwide protected and extremely threatened whale shark is on the Asian market (mainly Taiwan and Japan) still offered as Tofu Shark.
Besides the British the Germans consume most spiny dogfish. They produce the so-called “Schillerlocken” out of the sharks belly. The British use the spiny dogfish for “Fish & Chips “. This kind of shark is strongly overfished and its existence in the Northeast Atlantic decreased in the last 40 years by 90 percent.
Principal customers for shark fins are mainly eastern cultures in which shark fin soup represents a cultural meal. It is a remarkable fact that a shark fin, which consists to 90% out of cartilage, is extensively tasteless and only after days of boiling up in a broth becomes soft and gets the taste of the broth. Today shark fin soup is a status symbol because of the strongly risen prices within the last few years.
We can find shark products also in dog fodder, fish flour and even in fertilizers. From shark skin leather products such as purses, shoes or clock bracelets are produced.
Shark liver oil is frequently a component of the well-known cod-liver oil. In the health sector shark cartilage powders is marketed as fit making food additive although shark cartilages contains absolutely no fit making or other wholesome ingredients.
Most problematic is the marketing of shark cartilage as an anti-cancer means. The publication “Cancer Research” published in December 2004 confirms that shark cartilage preparations showed absolutely no effect against cancer.
However in the gel sector (food/pharmacy) shark collagen has few market chances although particularly Spain tries to penetrate into the market with shark collagen. Spain, one of the world largest shark fin producer, has 2002 forbidden to bring only the fins of sharks ashore. According to law the whole shark bodies must be brought now ashore. This leads now ridiculous-proves to the fact that out of the bodies the completely ineffective cartilage powder is made perforce.
In the cosmetics sector from shark cartilage won collagen is used for anti-fold creams and other preparations. Collagen from sharks is free of BSE and more kosher which makes it interesting for the Arab and Israeli markets.
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SOS attend international conference in Brussels
Following its acceptance of membership to the recently formed Shark Alliance, Save Our Sharks (SOS) attended the first anniversary and inaugural meeting of the Shark Alliance member groups in Brussels.
Around 35 delegates from 6 countries, U.K, France, Italy, Germany, Switzerland and Holland attended plus the directors and staff from the Pew Charitable Trusts, who financed the meeting.
Save Our Sharks were represented by Nigel Proctor (on behalf of the SOS committee) who met up at Brussels airport with the Sea Anglers Conservation Network (Scotland) representative, and SOS liaison officer Denis Kelly.
“Fins On”
One of the principal proposals that came out the conference is to be headed “Fins On” where the aim is to have sharks landed whole. There will be a drive to raise public awareness of the issue, and we will try to capitalise on the IUCN red listing, and create further publicity.
“Shark Week”
Another proposal is to hold a “Shark Week” in each member country, where each country’s members create a project to involve the community, schools, museums, aquariums and the like to raise awareness of shark issues.
There will be more to follow on the above shortly
There were many other issues and points made, however, these are the principal ones
• Strive to raise public awareness of shark related issues,
• Create adequate publicity and maintain the pressure,
• Educate journalists away from ‘sensationalism’ without portraying sharks as an animal they clearly are not, they are apex predators, not cuddly, loveable ‘toys’,
• Pre-influence the journalist way of thinking prior to ‘shark week’ and Ocean Day,
• Feed the media with facts and data to ‘force’ the attention on sharks prior to EU discussions on shark management,
• Similarly with CITES,
• Important to maintain ‘shark friendly’ states and get them to lobby less friendly countries,
• Lobby the UK to dispense with its ‘special permits’,
• Ensure that the Shark Alliance has a high profile at the release and showing of the new shark film,
• Don’t alienate the fishing industry,
• Work with fishermen, more is likely to be achieved at a faster rate,
Denis and Nigel were made extremely welcome and clearly treated as being amongst equals, if but a little less experienced in the ways of policy and lobbying. Nigel stated after the meeting that, “We have made significant moves along the pathway of shark conservation and have little to fear in the future, in terms of acceptability, we have a lot to offer and should not be afraid to push forward with our objectives, we can gain a great deal from liaison with the other member groups of the Shark Alliance, however, we also have a great deal to offer as well”.
At the conference Nigel reiterated the high level of importance UK anglers attached to sharks, skates and rays, making the point that the bad old days of trophy fish were long gone. He finished off by indicating our commitment and referencing the prohibition on the landing of tope along the English east coast (c 200 miles of coastline) which to the best of our knowledge is the first full protection, and or prohibition on the landing of any shark species in European waters. This brought about a warm and consensual round of applause, which probably indicates that we are not outcasts any more, but highly regarded and welcome members of an important Shark Alliance.
Well done to Nigel and Denis for helping to put recreational shark fishing on the front-line of European shark conservation
The next few months
We are in for a quiet time in Scotland until after the elections but there is much to do, in England and Europe. We will be writing to our members shortly with more details, please get involved.
• Liaise with the Shark Trust to organise a “Shark Week” to raise public awareness with the overall goal of banning the removing of fins at sea.
• Lobby Defra to stop handing out special permits which allows finning on Porbeagles. Both of the above are part of the “Fins On” campaign.
• Keep pressure on Defra to announce the results of the tope consultation.
• Build up a case to take to the EU to implement tope management across Europe.
• Remind Defra of their intention to implement a maximum landing size on rays, skate and spurdog.
• Keep pressure on the Scottish Exec. to have the Firth of Lorne, Sound of Mull and surrounding lochs and waters designated as a Spurdog nursery area.
• Lobby the EU to have the 25 per cent by catch on rays implemented in all UK waters.
• Continue with the red tape to get SOS listed for charitable status. Once achieved we can apply for grants to help with the campaigning and administrative costs.
Filed under Save Sharks · Tagged with ability, acceptability, acceptance, age, aim, air, airport, Alliance, alliance member, amp, Anglers, animal, anniversary, apex, apex predators, applause, aquariums, area, attention, awareness, ban, behalf, Brussels, brussels airport, Build, campaign, campaigning, capitalise, case, catch, cent, CITES, Co, coast, coastline, commitment, committee, community, conference, conference in Brussels, consensual, conservation, conservation network, consultation, Continue, country, Data, day, deal, Defra, Denis, Denis Kelly, Director, dog, Don, drive, ear, Educate, England, English, Ensure, EST, Europe, European, european waters, Exec, experience, fact, fear, feed, film, fin, Finning, fins, Firth, fish, fishermen, fishing, force, form, France, front, future, gel, Germany, germany switzerland, Gland, goal, Great, group, half, hand, head, hold, Holland, importance, Important, inaugural meeting, industry, influence, intention, International, issue, Italy, IUCN, iucn red list, journal, journalist, knowledge, land, landing, leg, level, Liaise, liaison, liaison officer, line, List, listing, Lobby, Lorne, lot, management, maximum, meeting, member, member country, member groups, membership, mind, Mull, Network, network scotland, Nigel, Nigel Proctor, nursery, object, ocean, offer, officer, organise, part, pathway, Pew, pew charitable trusts, point, policy, porbeagle, Porbeagles, Pre-influence, predators, pressure, Principal, principal proposals, proctor, profile, prohibition, project, proposal, protect, protection, public, public awareness, publicity, rat, rate, ray, recreation, Red, release, Remind, representative, round, Save, Scotland, Scottish, sea, sea anglers, sensationalism, serv, shark, Shark Alliance, shark conservation, shark fish, shark fishing, shark species, shark trust, shark week, Sharks, ship, showing, size, skate, skates, SOS, Sound, Species, spurdog, staff, status, Strive, Switzerland, tape, term, The Shark Trust, time, tope, trophy, Trust, Trusts, U.K, UK, uk waters, US, use, water, way, Week, With, work
SHARKWATER FILM
The Canadian born photographer and filmmaker never held a video camera before he began the Sharkwater project — but that is not apparent when you see the film. On the contrary, the imagery is beautifully framed, inspiring, and stunningly breathtaking. The images that Stewart sets forth will awe you, and will capture your heart.
Stewart set out to create a film that would simply depict how beautiful sharks are in their natural habitat. The finished product, however, ended up evolving into so much more. Instead, we’re drawn into an amazing story of human drama, organized crime, corruption, and greed.
The film kicks off with clips from military training videos archived from the 1960s. As might be expected, they depict sharks as ruthless and bloodthirsty man-eaters. The clips belie the ignorance of their times with suggestions such as putting one’s face in the water and yelling to deter a marauding shark.
While it provides an almost humorous relief to the serious subject matter, it is important to realize that 40 years ago, these films were definitive and authoritative. Forty years ago, we held these precepts to be truth. We look back and laugh, because now we know better. …Or do we?
The chasm between reality and the popular beliefs sustained and fueled by exaggerated media is still enormous.
In reality, sharks do not eat people, and they are not mindless killers. As long as people view sharks as dangerous predators, they won’t care about saving them, and this is exactly what Rob Stewart hopes to change.
Early in the film, Stewart begins to debunk some of the mystery and fear around sharks as he holds and pets an eight foot long Caribbean reef shark as if it were a lapdog. From this point on, his understanding of sharks and his community with the underwater world is evident.
In an effort to capture even more compelling underwater footage of sharks, Stewart joins renowned conservationist Paul Watson and the controversial Sea Shepard team aboard the Ocean Warrior. The team is invited and implored by the President of Costa Rica to help patrol the waters surrounding Cocos Island, one of the places celebrated as a gathering area for sharks, and where illegal shark fishing often takes place.
Complete with colliding ships, gunboat chases, espionage, corrupt courts, and spurious charges of attempted murder, the adventure that ensues is nothing short of epic.
Organized crime and conspiracy surrounding the shark fin industry is deeply entrenched. With dried fins sometimes fetching in excess of $400USD per pound, it is a multi-billion dollar industry rife with greed and corruption.
But it is more than corrupt government officials, or the “shark-fin mafia” that threaten Stewart’s life. Shortly after the entire crew must hurriedly flee from Costa Rica, Stewart is diagnosed with necrotizing fasciitis, the “flesh-eating” disease. Rare but deadly, the disease threatens to claim Stewart’s leg, and possibly his life. Alone, with only hope by his side, Stewart remains bedridden in a Panamanian hospital for an agonizing week before doctors can make any prognosis.
Determined more than ever to make a difference, Stewart defies reason and returns to Costa Rica. Knowing he would be arrested on sight, he and his crew must sneak back into the country. Ironically, when they arrive in Puntarenas, they are able to blend in — Protesters line the streets, demonstrating against shark finning and illegal shark fisheries. “Costa Ricans were rallying for sharks. . . I realized our adventure had helped awaken a country”, remarks Stewart with renewed faith.
Over the next four years, Stewart shot more than 400 hours of footage in 15 different countries. In addition to interviews with shark and conservation experts like Erich Ritter, Patrick Moore, and Rex Weyler, Sharkwater includes commentary from average beachgoers, showing how desperately fear and hate of sharks are ingrained. As one Australian angrily believes, “they’re the scourge of the ocean, and everyone should go and catch one.”
Sharks have been an integral part of the oceanic ecosystem for 400 million years, but their populations have declined by more than 90% in the last 50 years alone. It is estimated that more than 100 million sharks are killed for their fins each year.
Shark finning is neither humane nor sustainable. Any shark is taken, regardless of size, age, or species. After its fins are cut off, the shark is thrown back into the water. Unable to swim, and bleeding to death, the shark suffers a slow and torturous death.
Much of the demand for the fins stems from shark fin soup, a traditional asian dish often served at weddings and special events. Once a rare delicacy consumed by Chinese aristocracy, the dish is viewed as a symbol of status and power, and is gaining in popularity as China continues to modernize and its 1.2 billion people become more affluent.
Indeed, there is an uphill battle to be fought, but there is hope.
The Sharkwater crew interviews one Chinese bride who, defying long tradition and facing cultural stigma, makes a statement by refusing to serve shark fin soup at her wedding banquet. We can only hope that this — what is now seen as a controversial decision — will eventually become the norm.
With its spellbinding cinematography and riveting story, Sharkwater has won awards at every film festival where it has appeared. Sharkwater will change the way people view sharks and the ocean. It will open their eyes. . . and, hopefully, their hearts. You can create pet chrome emblems with Shark image to create awareness too.
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