If you want grant money these days, all you need to do is give global warming a mention and you’re all set; even if you’re talking about hybrid sharks.
Leading researchers in marine biology discovered 57 animals along a 2000 km stretch from Queensland to NSW.
The scientists say interbreeding between the two shark species is a sign the animals are adapting to climate change.
Since, the Common blacktip shark (C. limbatus) and the Australian blacktip shark (C. tilstoni) are different species, wouldn’t their offspring be infertile? Individuals of the same species can produce fertile and viable offspring. Individuals of different species cannot. This is the definition of a species, hence interspecific hybrids, such as these sharks, are infertile. Either we should be re-appraising the taxonomy of these sharks, perhaps labelling them as distinct sub-species, or they cannot adapt to climate change, as is being suggested. In order to do so they would have to pass on certain advantages to the next generation, and even if the hybrid has such advantageous traits, they won’t do much good if it are infertile.