{"refrec":{"BRefID":139823,"RR":"<b>League-Pike, P.E.; Shulman, M.J.</b> (2009). Intraguild predators: behavioral changes and mortality of the green crab (<i>Carcinus maenas</i>) during interactions with the American lobster (<i>Homarus americanus</i>) and Jonah crab (<i>Cancer borealis</i>). <i>J. Crust. Biol. 29(3)</i>: 350-355. <a href=\"https://dx.doi.org/10.1651/08-3066.1\" target=\"_blank\">https://dx.doi.org/10.1651/08-3066.1</a>","BEntID":133317,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>J. Crust. Biol. 29(3)</i>: 350-355. <a href=\"https://dx.doi.org/10.1651/08-3066.1\" target=\"_blank\">https://dx.doi.org/10.1651/08-3066.1</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"League-Pike, P.E.; Shulman, M.J.","OrigTitleTranslFlag":0,"Authorstringtrunc":"League-Pike, P.E.; Shulman, M.J.","Englishabstract":"The green crab <i>Carcinus maenas</i> invaded the Gulf of Maine over a hundred years ago and has become a well-established member of coastal ecosystems. <i>Carcinus</i> is most abundant in the intertidal zone despite higher availability of invertebrate prey in the nearby shallow subtidal. A previous study revealed a higher mortality rate for <i>Carcinus</i> in the subtidal than in the intertidal zone. Two other decapods, the American lobster <i>Homarus americanus</i> and Jonah crab <i>Cancer borealis</i>, have their highest abundance in the shallow subtidal. These three species have similar diets and predation among and within species occurs. We performed a laboratory experiment to investigate the effects of <i>H. americanus</i>, <i>C. borealis</i>, and larger conspecifics on mortality and behavior of <i>Carcinus</i>. <i>Homarus americanus</i> was the most effective predator on <i>Carcinus</i>, consuming 27% within 24 h. In contrast, only 5% of <i>Carcinus</i> were eaten by <i>C. Borealis</i> and none by conspecifics. The presence of American lobsters had dramatic effects on <i>Carcinus</i> behaviors: hiding and climbing increased while walking and standing on the open substrate decreased. In contrast, <i>Carcinus</i> showed no significant changes of behavior in the presence of <i>C. borealis</i> or larger conspecifics. The consumptive and non-consumptive (behavioral) effects of lobsters on <i>Carcinus</i> appear to be one major cause of the scarcity of <i>Carcinus</i> in subtidal communities. These effects are also likely to reduce <i>Carcinus</i> predation on the small invertebrates that are common prey for all the large decapods in this ecosystem.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Intraguild predators: behavioral changes and mortality of the green crab (<i>Carcinus maenas</i>) during interactions with the American lobster (<i>Homarus americanus</i>) and Jonah crab (<i>Cancer borealis</i>)","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-05-17 01:32:25.210234","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Carcinus maenas; Gulf of Maine; intertidal ecology; predation risk;trait-mediated effects","OtherDescriptors":null,"Notes":null,"AnaPub":2009,"MonPub":null,"DateUpdate":"2020-11-03","DateCreate":"2009-07-22","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000267457500009","VABBcode":null,"OpenAcc":0,"DOI":"10.1651/08-3066.1"},"refs":null,"anarec":{"AnaID":139823,"PubliDate":2009,"Pagination":"350-355","XtraPublOfAnaID":null,"ISBN":null,"Volume":"29","Issue":"3","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43037,"SerRR":"Journal of Crustacean Biology. Crustacean Society: Washington.  ISSN 0278-0372; e-ISSN 1937-240X","StandardTitleSer":"Journal of Crustacean Biology","ISSN":"0278-0372","AbbrevSer":"J. Crust. 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