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Maroc Maroc - WN.COM - Science - Hier 20:10

Blue crabs have a serious cannibalism problem

It’s a crab-eat-crab world for the Chesapeake Bay’s juvenile blue crabs (Callinectes sapidus). Literally. Cannibalism is the number one killer of the crustaceans that congregate in mid-salinity waters like coastal estuaries. As a result, the blue crabs are relying on the safety of some threatened shallow water habitats, according to a study published today in the journal Proceedings of the National Academy of Science (PNAS). The lives of blue crabs are anything but boring. They spend about two months floating around the ocean as larvae, only to be swept back into the lower Chesapeake Bay in Maryland to change into juveniles. While there, they rely on sea grass to keep them safe from...

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