Testing strength of biotic resistance against an introduced fish: inter-specific competition or predation through facultative piscivory?

PloS One
J Robert Britton

Abstract

Biotic resistance is the process where aspects of the receiving environment inhibit the establishment and invasion of an introduced species. Resistance against an introduced fish can be through strong competition and/or predation from resident fishes. Here, the biotic resistance against introduced topmouth gudgeon Pseudorasbora parva (a highly invasive fish in Europe) by resident carp Cyprinus carpio was tested in experimental mesocosms. The introduction scenario was six adult P. parva (three male, three female) on a single occasion. Resistance to their establishment was provided by three and six resident C. carpio whose effects on P. parva growth and reproduction were compared to a Control (no resident fish at the time of introduction) and treatments containing three and six P. parva. After 120 days, the growth rates of the introduced P. parva were significantly depressed in C. carpio presence and in mesocosms with three C. carpio present, significantly decreased numbers of 0+P. parva were recorded. Where six C. carpio were present, no 0+P. parva were recorded, indicating resistance strength increased with carp abundance. In contrast, there were no differences in P. parva reproduction and growth rates between the Control and t...Continue Reading

References

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Citations

Sep 22, 2012·Trends in Ecology & Evolution·J Robert Britton
Jun 4, 2015·Integrative Zoology·Serge MorandAlexis Ribas
Jul 12, 2017·Journal of Fish Biology·L Vilizzi, G H Copp
Aug 2, 2017·The Journal of Animal Ecology·Farah Al-ShorbajiRodolphe Gozlan

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