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Social network properties within a fish assemblage invaded by non-native sunbleak Leucaspius delineatus

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  • Beyer, Kathleen
  • Gozlan, Rodolphe E.
  • Copp, Gordon H.

Abstract

Network theory is commonly used to reveal social interactions and the organisation of interconnected nodes—but has not yet been applied to animal invasions. Non-native species invasions are now considered one of the foremost threats to natural ecosystems and biodiversity. This is the first attempt to assess social network properties within a freshwater fish assemblage invaded by a non-native fish species. We show that invasive sunbleak Leucaspius delineatus is socially more strongly interconnected with native species than the native species with each other. The social networks also reveal characteristics of a ‘small world’ such as low clustering coefficients C and short path lengths L. The findings may indicate potential traits of successful invaders and the implication for the spread of pathogens between individuals within a group of animals that contain a non-native invasive species. The success of establishment and subsequent invasion may be highlighted not only by the capacity of the new species to adapt to the new environment, but also in its capacity to penetrate the social circle of the native community.

Suggested Citation

  • Beyer, Kathleen & Gozlan, Rodolphe E. & Copp, Gordon H., 2010. "Social network properties within a fish assemblage invaded by non-native sunbleak Leucaspius delineatus," Ecological Modelling, Elsevier, vol. 221(17), pages 2118-2122.
    • Handle: RePEc:eee:ecomod:v:221:y:2010:i:17:p:2118-2122
    DOI: 10.1016/j.ecolmodel.2010.06.002
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    References listed on IDEAS

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    1. Rodolphe E. Gozlan & Sophie St-Hilaire & Stephen W. Feist & Paul Martin & Michael L. Kent, 2005. "Disease threat to European fish," Nature, Nature, vol. 435(7045), pages 1046-1046, June.
    2. Alicia Mathis & Douglas P. Chivers, 2003. "Overriding the oddity effect in mixed-species aggregations: group choice by armored and nonarmored prey," Behavioral Ecology, International Society for Behavioral Ecology, vol. 14(3), pages 334-339, May.
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