NDLI: Trait-mediated functional responses: predator behavioural type mediates prey consumption.

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Trait-mediated functional responses: predator behavioural type mediates prey consumption.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Toscano, Benjamin J. Griffen, Blaine D.
Description	Country affiliation: United States Author Affiliation: Toscano BJ ( Department of Biological Sciences, University of South Carolina, Columbia, SC, 29208, USA.); Griffen BD ( Department of Biological Sciences, University of South Carolina, Columbia, SC, 29208, USA.)
Abstract	The predator functional response (i.e. per capita consumption rate as a function of prey density) is central to our understanding of predator-prey population dynamics. This response is behavioural, depending on the rate of attack and time it takes to handle prey. Consistent behavioural differences among conspecific individuals, termed behavioural types, are a widespread feature of predator and prey populations but the effects of behavioural types on the functional response remain unexplored. We tested the effects of crab (Panopeus herbstii) behavioural type, specifically individual activity level, on the crab functional response to mussel (Brachidontes exustus) prey. We further tested whether the effects of activity level on the response are mediated by the presence of toadfish (Opsanus tau) predation threat in the form of waterborne chemical cues known to reduce crab activity level. The effects of crab activity level on the functional response were dependent on crab body size. Individual activity level increased the magnitude (i.e. slope and asymptote) of the type II functional response of small crabs, potentially through an increase in time spent foraging, but had no effect on the functional response of large crabs. Predation threat did not interact with activity level to influence mussel consumption, but independently reduced the slope of the type II functional response. Overall, this study demonstrates size-specific effects of a behavioural type on a predator-prey interaction, as well as a general pathway (modification of the functional response) by which the effects of individual behavioural types can scale up to influence predator-prey population dynamics.
File Format	HTM / HTML
ISSN	00218790
e-ISSN	13652656
Journal	Journal of Animal Ecology
Issue Number	6
Volume Number	83
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2014-11-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Environmental Health Discipline Zoology Batrachoidiformes Physiology Brachyura Food Chain Mytilidae Predatory Behavior Animals Body Size Cues Olfactory Perception Population Dynamics Research Support, U.s. Gov't, Non-p.h.s.
Content Type	Text
Resource Type	Article
Subject	Animal Science and Zoology Ecology, Evolution, Behavior and Systematics

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