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A gastropod's induced behavioral and morphological responses to invasive Carcinus maenas in Australia indicate a lack of novelty advantage


Freeman, AS and Wright, JT and Hewitt, CL and Campbell, ML and Szeto, K, A gastropod's induced behavioral and morphological responses to invasive Carcinus maenas in Australia indicate a lack of novelty advantage, Biological Invasions, 15, (8) pp. 1795-1805. ISSN 1387-3547 (2013) [Refereed Article]

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Copyright 2013 Springer Science+Business Media

DOI: doi:10.1007/s10530-013-0409-z


Evolution has afforded many organisms the capacity to recognize predation threats and respond accordinglywith behavioral andmorphological defenses. Biological invasions may obviate these coevolved recognition systems resulting in biological interactions with native species that range from novelty advantages to disadvantages for the introduced species. Predator recognition initiates responses that can affect other community members through trait-mediated indirect interactions. In this study we use the Australian invasion of a marine, predatory crab (Carcinus maenas) to determine if populations of a native whelk (Haustrum vinosum) with different histories of Carcinus invasion (no previous exposure, 20 years of exposure and 100 years of exposure) recognize and respond to the introduced crab. Haustrum were subsampled from invaded and uninvaded populations then monitored for foraging behavior, shell growth and tissue growth while maintained in a common garden setting with and without waterborne cues from Carcinus. We found that both invaded and uninvaded populations of Haustrum recognize and respond to Carcinus by reducing shell growth and foraging. In feeding experiments, Carcinus showed a preference for small whelks but not thin-shelled whelks. Our results suggest that introduced populations of Carcinus in Australia do not benefit from a novelty advantage and that the induced morphological changes in Haustrum are not a defense, per se. Haustrumís induced behavioral response to Carcinus may be more important in reducing predation than morphological defenses, and further propagate the invasive crabís impacts.

Item Details

Item Type:Refereed Article
Keywords:invasive crab, biogeography, predation
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Behavioural ecology
Objective Division:Environmental Management
Objective Group:Marine systems and management
Objective Field:Marine biodiversity
UTAS Author:Freeman, AS (Dr Aaren Freeman)
UTAS Author:Wright, JT (Associate Professor Jeffrey Wright)
UTAS Author:Hewitt, CL (Professor Chad Hewitt)
ID Code:86750
Year Published:2013
Funding Support:Australian Research Council (LX0989775)
Web of Science® Times Cited:8
Deposited By:NC Marine Conservation and Resource Sustainability
Deposited On:2013-10-17
Last Modified:2017-10-31

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