Microhabitat use and interspecific associations of introduced topmouth gudgeon Pseudorasbora parva and native fishes in a small stream

Authors

  • K. Beyer,

    Corresponding author
    1. * Salmon & Freshwater Team, Centre for Environment Fisheries & Aquaculture Science, Pakefield Road, Lowestoft, Suffolk NR33 0HT, U.K., Centre for Ecology & Hydrology, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, U.K. and Hull International Fisheries Institute, University of Hull, Cottingham Road, Hull, Humberside HU6 7RX, U.K.
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  • G. H. Copp,

    1. * Salmon & Freshwater Team, Centre for Environment Fisheries & Aquaculture Science, Pakefield Road, Lowestoft, Suffolk NR33 0HT, U.K., Centre for Ecology & Hydrology, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, U.K. and Hull International Fisheries Institute, University of Hull, Cottingham Road, Hull, Humberside HU6 7RX, U.K.
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  • R. E. Gozlan

    1. * Salmon & Freshwater Team, Centre for Environment Fisheries & Aquaculture Science, Pakefield Road, Lowestoft, Suffolk NR33 0HT, U.K., Centre for Ecology & Hydrology, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, U.K. and Hull International Fisheries Institute, University of Hull, Cottingham Road, Hull, Humberside HU6 7RX, U.K.
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    • Present address: School of Conservation Sciences, Bournemouth University, Dorset House, Talbot Campus, Fern Barrow, Poole, Dorset BH12 5BB, U.K.


§Author to whom correspondence should be addressed at present address: APEM (Aquatic Scientists) Ltd, Centre for Innovation & Enterprise, Oxford University Begbroke Science Park, Sandy Lane, Yarnton, Oxfordshire OX5 1PF, U.K. Tel.: +44 (0) 1865 854 853; fax: +44 (0) 1865 854 801; email: k.beyer@apemltd.co.uk

Abstract

To address a lack of information on topmouth gudgeon Pseudorasbora parva introduced to watercourses, the microhabitat use of this non-native cyprinid and co-existing native species was assessed in a small stream located in southern England. Overall, microhabitat use was size-structured and significant associations were observed between topmouth gudgeon and native species, including brown trout Salmo trutta, chub Leuciscus cephalus, European bullhead Cottus gobio and stone loach Barbatula barbatula. Significant associations with environmental variables, however, were more frequent in native species than in topmouth gudgeon. Topmouth gudgeon demonstrated few habitat preferences, which were weak and limited to small specimens, emphasizing the species broad, plastic breadth of microhabitat use. This is expected to facilitate the species’ successful invasion of novel aquatic systems.

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