Warm-blooded sharks have evolved a “competetive advantage” over their prey, according to evolution.
SHARKS are scary enough on their own, but scientists have now discovered how evolution has given deep marine predators an unfair advantage over their victims.
Fish, like reptiles, are cold-blooded organisms in general, however certain shark species are exceptions to this norm. For a long time, experts have been perplexed by this quirk, but that is no longer the case. Researchers from Trinity College Dublin have finally solved the puzzle, explaining how being warm-blooded gives predators a “competitive advantage” when hunting in a recently published study.
Ectothermic (cold-blooded) species, both terrestrial and aquatic, are unable to control their internal body temperatures.
This is why you’ll often find geckos and other lizards basking in the sun or hiding in the shadows; they rely on their surroundings to keep a consistent temperature.
Warm-blooded (endothermic) species, such as humans and other mammals, are immune to this problem because their bodies maintain a constant internal temperature without needing to be exposed to the Sun’s rays.
But what kind of benefit would this provide to certain fish species?
Warm-blooded fish can regulate their body temperatures and are faster than their competitors, according to researchers, although this is not true of all species.
Warm-blooded or somewhat warm-blooded species include the great white shark, bluefin tuna, and shortfin mako shark.
Species like the tiger shark, on the other hand, still rely on the water to control their temperatures.
Warm-blooded fish, on the other hand, are just as vulnerable to shifting ocean temperatures as their cold-blooded cousins, according to a new study published in the journal Functional Ecology.
“Scientists have long known that all fish are cold-blooded,” said Lucy Harding, a PhD candidate at Trinity College Dublin and the study’s first author.
“Some have evolved the ability to warm sections of their body in order to stay warmer than the water around them, but the benefits of this ability have remained unknown.
“Some believed that being warm-blooded allowed them to swim faster because warmer muscles are more powerful, while others believed that it let them to dwell in a wider range of temperatures and so be more tolerant to the effects of climate change-related ocean warming.”
Warm-blooded fish, on the other hand, do not dwell in waters with a wider temperature range, according to the experts.
They were successful. “Brinkwire News in Condensed Form.”