NDLI: Potential impacts of invasive crabs on one life history strategy of native rock crabs in the Gulf of Maine

Content Provider	Springer Nature Link
Author	Griffen, Blaine D. Riley, Megan E.
Copyright Year	2015
Abstract	Organismal life history strategies are continually being strained by increasing environmental change, including exposure to invasive species. The rock crab Cancer irroratus is a commercially harvested species in the Northeastern US and Canada where previous studies have reported it uses subtidal habitats as a juvenile and then undergoes a habitat shift into deeper offshore waters to mature and reproduce. We demonstrate that in intertidal habitats of the Gulf of Maine, this species reaches reproductive maturity, and does so at a smaller size than has previously been recognized. Our goal here is to identify potential mechanisms by which the presence of invasive European green crabs (Carcinus maenas) and Asian shore crabs (Hemigrapsus sanguineus) may influence the success of this intertidal life history strategy of rock crabs based on the ecology and reproductive requirements of these young intertidal crabs. We experimentally demonstrate that the reproductive success of small rock crabs in intertidal habitats depends on a carnivorous lifestyle. Further, we demonstrate that juvenile rock crabs are more susceptible to predation by both invasive species than they are to cannibalism. Finally, using a numerical model to calculate lifetime rock crab fecundity, we demonstrate that this intertidal strategy is only beneficial when crabs experience reduced predation risk intertidally relative to in subtidal habitats. Together, our results demonstrate that invasive European green crabs and Asian shore crabs have the potential to greatly reduce the reproductive benefit of intertidal habitat use by young rock crabs.
Starting Page	2533
Ending Page	2544
Page Count	12
File Format	PDF
ISSN	13873547
Journal	Biological Invasions
Volume Number	17
Issue Number	9
e-ISSN	15731464
Language	English
Publisher	Springer International Publishing
Publisher Date	2015-06-30
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cancer irroratus Carcinus maenas Fecundity Hemigrapsus sanguineus Invasive species Life-history strategy Ecology Freshwater & Marine Ecology Plant Sciences Developmental Biology
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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