Aquatic macroinvertebrate responses to native and non-native predators

Haddaway, N.R., Vieille, D., Mortimer, R.J.G. ORCID: 0000-0003-1292-8861, Christmas, M. and Dunn, A.M., 2014. Aquatic macroinvertebrate responses to native and non-native predators. Knowledge and Management of Aquatic Ecosystems (415). ISSN 1961-9502


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Non-native species can profoundly affect native ecosystems through trophic interactions with native species. Native prey may respond differently to non-native versus native predators since they lack prior experience. Here we investigate antipredator responses of two common freshwater macroinvertebrates, Gammarus pulex and Potamopyrgus jenkinsi, to olfactory cues from three predators; sympatric native fish (Gasterosteus aculeatus), sympatric native crayfish (Austropotamobius pallipes), and novel invasive crayfish (Pacifastacus leniusculus). G. pulex responded differently to fish and crayfish; showing enhanced locomotion in response to fish, but a preference for the dark over the light in response to the crayfish. P. jenkinsi showed increased vertical migration in response to all three predator cues relative to controls. These different responses to fish and crayfish are hypothesised to reflect the predators’ differing predation types; benthic for crayfish and pelagic for fish. However, we found no difference in response to native versus invasive crayfish, indicating that prey naiveté is unlikely to drive the impacts of invasive crayfish. The Predator Recognition Continuum Hypothesis proposes that benefits of generalisable predator recognition outweigh costs when predators are diverse. Generalised responses of prey as observed here will be adaptive in the presence of an invader, and may reduce novel predators’ potential impacts.

Item Type: Journal article
Publication Title: Knowledge and Management of Aquatic Ecosystems
Creators: Haddaway, N.R., Vieille, D., Mortimer, R.J.G., Christmas, M. and Dunn, A.M.
Publisher: EDP Sciences
Date: 2014
Number: 415
ISSN: 1961-9502
Rights: The original publication is available at
Divisions: Schools > School of Animal, Rural and Environmental Sciences
Record created by: EPrints Services
Date Added: 09 Oct 2015 10:01
Last Modified: 09 Jun 2017 13:17

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