Reptile & Amphibian Forums

Not reptile related but interesting reading on hybrid sharks in nature. Link has picture,

"Hybrid sharks have been discovered swimming in the waters off Australia's east coast. The finding may be driven by climate change, a research team says, suggesting such discoveries could be more common in the future."

"The hybridization is between the Australian black tip shark which favors tropical waters and the larger, common black tip shark, which favors sub-tropical and temperate waters."

http://futureoftech.msnbc.msn.com/_news/2012/01/03/9921974-australias-hybrid-shark-reveals-evolution-in-action

That would be a natural intergrade . Which is not anything like hybrid.
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www.Bluerosy.com

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It's not anything like a hybrid?
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Gerard

"Destruction of the empty spaces, is my one and only crime."

www.livebaitclip.com

GONE FISHING!!!

While they are technically hybrids (natural intergrades ARE hybrids), the parent species are very similar, and natural ranges overlap. A reptile example would be the "greenish" rat snake, happening when black rats and yellow rats crossbreed.it is technically a naturally occurring hybrid, albeit from 2 closely related snakes from the same family; unlike say,a jungle corn, which can only happen in captivity.
if the shark had been a cross between a nurse and bull shark, for example, the debate wouldn't be happening in the first place. But since both species were blacktips to begin with, the offspring wouldn't appear unusual.
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The debate is about captive breedings. Natural intergrades are one thing, there are only a small portion of certain species that overlap. Not all fl kings and eastern kings have the ability to hybridize. So unless you have snakes from the edges of the range, IMO, they are hybrids. The rules here say different and I am not arguing that. Just my thought on the "discussion".
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Gerard

"Destruction of the empty spaces, is my one and only crime."

www.livebaitclip.com

GONE FISHING!!!

Natural intergrades ARE hybreds.? So, what is a intergrade now days? When did the liberlized meaning of hybred become excepted by Science and for what notion..er reasoning? Is there any reason to classify subspecies anymore? Is all the hybred snake breeding going on because the Taxomny was wrong from the beginning. What happens to words that die? Where do they go? *disclammer not intended to hurt anyones feelings or LOL. VM

A hyrid would be if the shark bred with a dolphin or fish.
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www.Bluerosy.com

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