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Inter- and intraspecific trait compensation of defence mechanisms in freshwater snails

Author:
  • Simon D. Rundle
  • Christer Brönmark
Publishing year: 2001
Language: English
Pages: 1463-1468
Publication/Series: Royal Society of London. Proceedings B. Biological Sciences
Volume: 268
Issue: 1475
Document type: Journal article
Publisher: Royal Society

Abstract english

Trait compensation occurs when mechanically independent adaptations are negatively correlated. Here, we report the first study to demonstrate trait compensation in predator-defence adaptations across several species. Freshwater pulmonate snails exposed experimentally to predation chemical cues from fishes and crushed conspecifics showed clear interspecific differences in their behavioural avoidance responses, which were negatively correlated with shell crush resistance. The type of avoidance response varied between species: thin-shelled species (Lymnaea stagnalis and Physa fontinalis) moved to the water-line or out of the water, while those with thick shells moved under cover or showed a mixed response. There were also intraspecific size-linked differences, with an ontogenetic increase in shell strength accompanied by a decrease in behavioural avoidance. Such trait compensation in response to predation has important implications for interspecific interactions and food-web dynamics.

Keywords

  • Ecology

Other

Published
  • ISSN: 1471-2954
Christer Brönmark
E-mail: christer [dot] bronmark [at] biol [dot] lu [dot] se

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Division aquatic ecology

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+46 73 081 55 48

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Professor

Aquatic Ecology

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Professor

Division aquatic ecology

+46 46 222 37 02

+46 73 081 55 48

E-C125

Sölvegatan 37, Lund

50

Research group

Aquatic Ecology

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