Fish are getting progressively smaller thanks to species replacement, new research finds

Organisms are becoming smaller through a combination of species replacement, and changes within species, according to new research published in Science.

The research, led by the University of St Andrews’ and supported by the University of Nottingham, looked at data from across the world over the last 60 years, and from many types of animals and plants.

Previous research showed that the size of trophy fish in fishing competitions has decreased, and that many of the most threatened species are large.

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