caa a22 4500 463168003 CHVBK 20180406164805.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1007/s10530-006-9085-6 doi (NATIONALLICENCE)springer-10.1007/s10530-006-9085-6 The invasive green crab and Japanese shore crab: behavioral interactions with a native crab species, the blue crab [Elektronische Daten] [James MacDonald, Ross Roudez, Terry Glover, Judith Weis] Blue crabs, Callinectes sapidus (Rathbun), are an ecologically and commercially important species along the East coast of North America. Over the past century and a half, blue crabs have been exposed to an expanding set of exotic species, a few of which are potential competitors. To test for interactions with invasive crabs, juvenile C. sapidus males were placed in competition experiments for a food item with two common non-indigenous crabs, the green crab Carcinus maenas (L.) and the Japanese shore crab, Hemigrapsus sanguineus (De Haan). Agonistic interactions were evaluated when they occurred. In addition, each species' potential to resist predators was examined by testing carapace strength. Results showed that C. maenas was a superior competitor to both C. sapidus and H. sanguineus for obtaining food, while the latter two species were evenly matched against each other. Regarding agonism, C. sapidus, was the "loser” a disproportionate number of times. C. sapidus carapaces also had a significantly lower breaking strength. These experiments suggest that both as a competitor, and as potential prey, juvenile blue crabs have some disadvantages compared with these common sympatric exotic crab species, and in areas where these exotics are common, juvenile native blue crabs may be forced to expend more energy in conflict that could be spent foraging, and may be forced away from prime food items toward less optimum prey. Springer Science+Business Media, Inc., 2007 Agonism nationallicence Behavior nationallicence Callinectes sapidus nationallicence Carcinus maenas nationallicence Juvenile competition nationallicence Hemigrapsus sanguineus nationallicence Marine invasion nationallicence MacDonald James Graduate Program in Ecology, Evolution, and Natural Resources, Rutgers University-New Brunswick, 14 College Farm Road, Cook Campus, 08901, New Brunswick, NJ, USA aut Roudez Ross Department of Biological Sciences, Rutgers University, 195 University Ave, 07102, Newark, NJ, USA aut Glover Terry Division of Social and Behavioral Sciences, Bloomfield College, 07003, Bloomfield, NJ, USA aut Weis Judith Graduate Program in Ecology, Evolution, and Natural Resources, Rutgers University-New Brunswick, 14 College Farm Road, Cook Campus, 08901, New Brunswick, NJ, USA aut Biological Invasions Springer Netherlands 9/7(2007-10-01), 837-848 1387-3547 9:7<837 2007 9 10530 https://doi.org/10.1007/s10530-006-9085-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10530-006-9085-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- MacDonald James Graduate Program in Ecology, Evolution, and Natural Resources, Rutgers University-New Brunswick, 14 College Farm Road, Cook Campus, 08901, New Brunswick, NJ, USA aut NATIONALLICENCE 700 1- Roudez Ross Department of Biological Sciences, Rutgers University, 195 University Ave, 07102, Newark, NJ, USA aut NATIONALLICENCE 700 1- Glover Terry Division of Social and Behavioral Sciences, Bloomfield College, 07003, Bloomfield, NJ, USA aut NATIONALLICENCE 700 1- Weis Judith Graduate Program in Ecology, Evolution, and Natural Resources, Rutgers University-New Brunswick, 14 College Farm Road, Cook Campus, 08901, New Brunswick, NJ, USA aut NATIONALLICENCE 773 0- Biological Invasions Springer Netherlands 9/7(2007-10-01), 837-848 1387-3547 9:7<837 2007 9 10530 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer