Fish can 'talk' - dialect of European cods is different to that of American cods

Scientists are investigating about whether fish have regional accents along the British coastline. Research has already established that European cod have distinct dialects to their transatlantic American cousins. The study is undertaken by the University of Exeter and, a marine biologist who is leading a new study has revealed that this species is highly vocal with traditional breeding grounds established over hundreds or even thousands of years. Hence, in his opinion, the potential for regionalism is there.
This has been reported in news.sky.com dated 5 October 2016.

Climate change is pushing cold-water species north. As a result, fish with different vocal repertoires could be pushed together and struggle to integrate, share territory and breed. Moreover, "chatty" fish are being drowned out by the noise of boat engines. That could mean cod and chips at risk.
It is interesting to note that fish make distinct sounds with their swim bladders to assert territorial claims, seek a mate and "gossip" with others in the shoal. Male cod produce thumping and rumbling sounds as they swim towards the surface with a female to convince her to release eggs and the parrotfish are known to make crunching noises as they eat algae on reefs.
Others who talk are clownfish - thy make a popping sound to show dominance and purr to show submission and the male midshipman hums to attract female companions.
However, the study has discovered that the barrage of sound that comes from marine traffic is making it difficult for fish to make themselves heard. Hence, the study is investigating the effects of such noise pollution on the behavior of cod, haddock and other species.


Image courtesy wikimediacommons.org


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