News tagged with fins
Newly discovered sensory organ in the chin of baleen whales allows them to be world's largest hunters
Lunge feeding in rorqual whales (a group that includes blue, humpback and fin whales) is unique among mammals, but details of how it works have remained elusive. Now, scientists from the Smithsonian Institution ...
May 23, 2012 |
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Taiwan uses DNA mapping to save endangered sharks
Taiwan has begun testing DNA from shark fins sold in local markets in a bid to protect endangered species such as great whites and whale sharks, an official from the Fisheries Agency said Wednesday.
May 23, 2012 |
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From fins to limbs
Tonight Cambridge vertebrate palaeontologist Professor Jenny Clack is the subject of BBC Four’s Beautiful Minds series. The programme looks at her contribution to our understanding of early tetrapods ...
Other Sciences / Archaeology & Fossils
Apr 12, 2012 |
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EU agrees crack down on shark finning
The European Union endorsed tighter shark fishing rules on Monday to ensure fishermen respect a ban on slicing off the fins of their catches and throwing the live body overboard to drown.
Mar 19, 2012 |
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Shark fin soup to blame for blue shark decline
Scientists say the market for shark fin soup is the likeliest reason for the sharp drop in blue shark numbers over the last 30 years.
Mar 09, 2012 |
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Law that regulates shark fishery is too liberal: study
Shark fins are worth more than other parts of the shark and are often removed from the body, which gets thrown back into the sea. To curtail this wasteful practice, many countries allow the fins to be landed ...
Mar 02, 2012 |
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Two new species of fish found able to regenerate a lost fin
(PhysOrg.com) -- History has shown that many invertebrates are able to regenerate lost limbs. Rare however, are animals with backbones that are able to do so, and when they do exist, they are usually amphibians ...
Feb 23, 2012 |
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New York eyes shark fin trade ban
A group of New York legislators on Tuesday unveiled a draft law banning trade in shark fins, saying the practice, which serves the market for Chinese shark fin soup, was decimating the ocean predators.
Feb 21, 2012 |
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Jurassic salamanders with stomach contents found from Inner Mongolia
Paleontologists from Chinese Academy of Sciences reported two Jurassic salamanders with stomach contents from Daohugou, Ningcheng County, Inner Mongolia, China, as reported in Chinese Science Bulletin online ...
Other Sciences / Archaeology & Fossils
Feb 06, 2012 |
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German engineers mimic humpback whale to increase helicopter stability
(PhysOrg.com) -- Whale researchers have known for some time that humpback whales are able to perform feats of underwater acrobatics that belie their huge size and that some of that ability is partly due to ...
Feb 01, 2012 |
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New study showing pelvic girdles arose before the origin of movable jaws
Almost all gnathostomes or jawed vertebrates (including osteichthyans, chondrichthyans, ‘acanthodians’ and most placoderms) possess paired pectoral and pelvic fins. To date, it has generally been ...
Other Sciences / Archaeology & Fossils
Jan 10, 2012 |
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Fisherman's gold: Shark fin hunt empties west African seas
Retired fisherman Sada Fall is upbeat. His two sons are returning from sea with a boatload of "gold", as he calls shark fins, whose value has near-obliterated the ocean's top predator in these seas.
Jan 08, 2012 |
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Singapore supermarket to stop selling shark fin
Singapore's largest supermarket chain will stop selling shark fin products from April after an inflammatory comment by one of its suppliers triggered calls for a boycott from activists and the public.
Jan 06, 2012 |
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Hong Kong's shark fin traders feel pressure to change
The owner of Shark's Fin City, a dried fin wholesaler in Hong Kong's quarter for all things shrivelled, says there are only a few people who know the truth about sharks, and he's one of them.
Nov 28, 2011 |
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The shark, a predator turned prey
Sharks may strike terror among swimmers at the beach but the predators are increasingly ending up as prey, served up in fish-and-chips shops, sparking concern among environmentalists.
Nov 25, 2011 |
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Fin
A fin is a surface used for stability and/or to produce lift and thrust or to steer while traveling in water, air, or other fluid media, (in other words, a foil (fluid mechanics)). The first use of the word was for the limbs of fish, but has been extended to include other animal limbs and man-made devices. Fins, as with other foils, operate in fluids such as water or air.
Fins are seen both in nature and in manmade iterations.
Swimming water animals such as fish and cetaceans actively use pectoral fins for maneuvering, and dorsal fins contribute stability as the animal swims, propelling and maneuvering with its tail, itself recognizable as a fin.
The fin on fixed-wing aircraft is known as a vertical stabilizer. Fins are also seen used as e.g., fletching on arrows and at the rear of some bombs, missiles, rockets, and self-propelled torpedoes. These are typically "planar" (shaped like small wings), although grid fins are sometimes used in specialized cases.
Examples of fins include:
For more information about Fin, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
