Tag: "fin" at biology news

Triple threat: World fin trade may harvest up to 73 million sharks per year

...ober 2006 edition of Ecology Letters. "The shark fin trade is notoriously secretive. But we were able tap into fin auction records and convert from fin sizes and weights to whole shark equivalents to get a good hand...

Humpback whales have brain cells also found in humans

...humpback whale and compared it with the brain of a fin whale (another baleen species) and brains from sev...s" in the cerebral cortex that is also seen in the fin whale and other types of mammals. The authors speculate that this structural feature may have evolv...

How does a zebrafish grow a new tail?

...-catenin, impairs cell proliferation, and inhibits fin regeneration. Fish that have a mutant Wnt5b protein regenerate missing tails very quickly. Too much of another related protein, Wnt8, also increases cell proliferation in the regenerating fin. "We can actually increase the rate of regeneration by t...

UF scientists discover evolutionary origin of fins, limbs

... intuitively one would think the genetic tools for fin development would be brought together in that plac...ebrates was a major evolutionary innovation toward fin - and eventually limb - locomotion, Cohn said. The earliest fishes lacked paired fins, similar to th...

IMF Launches World’s First DNA Database for Myeloma Patients

... are conspicuous, elongate projections of the tail fin and are known to be subject to female mate choice.... he said. "That is, male ornamentation of the tail fin may have evolved largely due to the pre-existing preference for an elongate structure of a similar s...

Certain fish have a special mating preference

... are conspicuous, elongate projections of the tail fin and are known to be subject to female mate choice.... he said. "That is, male ornamentation of the tail fin may have evolved largely due to the pre-existing preference for an elongate structure of a similar s...

Same mutation aided evolution in many fish species, Stanford study finds

...rom marine ancestors that are covered head to hind fin in body armor. Although it's not clear why losing ...work a visible change in the fish. However, in the fin study the group wasn't able to pinpoint the exact genetic alteration. The group continues to wade o...

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