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- W1751916780 abstract "The green crab Carcinus maenas invaded the Gulf of Maine over a hundred years ago and has become a well-established member of intertidal communities. We surveyed the vertical distribution of Carcinus, other crabs, and their potential prey from the intertidal into the shallow subtidal. Carcinus was most abundant in the intertidal and decreased in the subtidal. In contrast, a preferred prey of Carcinus, the mussel Mytilus edulis, had highest densities in the shallow subtidal. Why isn’t Carcinus most abundant where prey densities are highest? A previous experiment revealed a higher mortality rate for Carcinus tethered in the subtidal than in the intertidal. In the subtidal there are higher abundances of the American lobster Homarus americanus and Jonah crab Cancer borealis. We performed a laboratory experiment to investigate the effects of cohabitation with lobster and C. borealis on survival, shelter use, and behavior of Carcinus. Lobsters were the more effective predator on Carcinus, consuming 27% of the crabs during 24 hours. Only 5% of Carcinus were eaten by C. borealis and none by conspecifics used in control treatments. In the presence of lobsters, Carcinus showed significantly more climbing and deep burrowing behavior relative to controls. Our results suggest that the risk of predation by lobsters underlies the scarcity of Carcinus in subtidal communities. Introduction The invasion of the east coast of North America by the European green crab Carcinus maenas (henceforth refereed to as Carcinus) began over 100 years ago. Since its initial introduction into New York and New Jersey, Carcinus has expanded its range northward into the Gulf of Maine (Audet et al. 2003, Taylor et al. 1957), becoming a major presence in intertidal communities. Carcinus is omnivorous and consumes a wide range of prey: bivalves (the mussel Mytilus edulis and soft-shell clam Mya arenaria); gastropods (Littorina littorea and L. obtusata); barnacles; amphipods; crabs (Cancer irroratus, Carcinus); and algae (Ropes 1968, Elner 1981, Seeley 1986, Rangeley and Thomas 1987). In the Gulf of Maine, Carcinus shares its range with other abundant subtidal and intertidal decapods including the Jonah crab (Carcer borealis), rock crab (Cancer irroratus), and American lobster (Homarus americanus henceforth refereed to as lobster)." @default.
- W1751916780 created "2016-06-24" @default.
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- W1751916780 date "2007-06-29" @default.
- W1751916780 modified "2023-09-26" @default.
- W1751916780 title "When getting a meal may cost your life: Exploring the incongruous distribution between the green crab Carcinus maenas and its prey" @default.
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