a small fish in a big pond

Fish have lost half their average body mass and smaller species are making up a larger proportion of European fish stocks as a result of global warming, a study has found.

It’s huge, said study author Martin Daufresne of the Cemagref Public Agricultural and Environmental Research Institute in Lyon, France.

Size is a fundamental characteristic that is linked to a number of biological functions, such as fecundity — the capacity to reproduce.

While commercial and recreational fishing did impact some of the fisheries studied, it “cannot be considered as the unique trigger” for the changes in size, the study published in the Proceedings of the National Academy of Sciences found.

Although not negating the role of other factors, our study provides strong evidence that temperature actually plays a major role in driving changes in the size structure of populations and communities, the study concluded. Heat Is Online, – originally Discover.com 20 Jul 2009