NDLI: The influence of evolution and plasticity on the behavior of an invasive crayfish

Content Provider	Springer Nature Link
Author	Reisinger, Lindsey S. Elgin, Ashley K. Towle, Kevin M. Chan, David J. Lodge, David M.
Copyright Year	2016
Abstract	Invasion success can be enhanced by evolution and behavioral plasticity, but the importance of these processes for most invasions is not well understood. Previous research suggests there is a genetic basis for differences in growth rate between native and invaded range rusty crayfish (Orconectes rusticus). We hypothesized that invaded range O. rusticus achieve faster growth by allocating more time to foraging and less to defense. We conducted a laboratory experiment to test the effects of range (native or invaded) and plasticity (as induced by exposure to predators) on crayfish behavior. We collected O. rusticus adults and eggs from both ranges, hatched eggs in the lab, and reared juveniles in common conditions either with or without predatory fish. We then quantified adult and juvenile crayfish activity in an experiment with and without predatory fish. In support of our hypothesis, invaded range adults displayed reduced antipredator behavior compared to native range adults. Further, invaded range juveniles were more active than native range juveniles without predators, but all juveniles were inactive with predators. In addition, invaded range juveniles had greater plasticity in behavior than native range juveniles. These results suggest that activity level in the absence of predators has diverged in the invaded range. Because active crayfish consume more prey, this change in behavior may be responsible for rapid growth in the invaded range of O. rusticus, a trait that contributes to the strong ecological impacts of this invasive crayfish.
Starting Page	815
Ending Page	830
Page Count	16
File Format	PDF
ISSN	13873547
Journal	Biological Invasions
Volume Number	19
Issue Number	3
e-ISSN	15731464
Language	English
Publisher	Springer International Publishing
Publisher Date	2016-12-03
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Invasive species Feeding Predation Foraging rate Antipredator behavior Behavioral plasticity 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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