Competition for shelter between four invasive gobiids and two native benthic fish species  

作　　者：N. VAN KESSEL M. DORENBOSCH M.R.M. DE BOER R.S.E.W. LEUVEN G. VAN DER VELDE 

机构地区：[1]Radboud University Nijmegen, Institute for Water and Wetland Research, Department of Animal Ecology and Ecophysiology, EO. Box 9010, 6500 GL Nijmegen, The Netherlands [2]Radboud University Nijmegen, Institute for Water and Wetland Research, Department of Environmental Science, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands [3]Natuurbalans - Limes Divergens, P.O. Box 31070, 6503 CB Nijmegen, The Netherlands [4]Netherlands Institute of Ecology （NIOO - KNAW）, EO. Box 50, 6700 AB Wageningen, The Netherlands [5]Netherlands Centre for Biodiversity Naturalis, EO. Box 9517, 2300 RA Leiden, The Netherlands

出　　处：《Current Zoology》2011年第6期844-851,共8页动物学报（英文版）

摘　　要：Recent invasions by non-native gobiid fish species that are ongoing in the Western European rivers Rhine and Meuse, will lead to interactions with native benthic fish species. Since both non-native gobiids and native benthic species are bottom dwelling species with a preference for shelter during at least part of their life cycle, it is likely that competition for shelter will occur between these non-native and native species when shelter is a limiting factor. To investigate the importance of this mecha- nism for species replacements, various habitat choice experiments were conducted between two common native benthic fish spe- cies （Cottus perifretum and Barbatula barbatula） and four invasive non-native gobiid species （Proterorhinus semilunaris, Neogo- bius melanostomus, N. kessleri and N. fluviatilis）. The first series of single specimen experiments determined the habitat choice of each individual fish species. In a second series of competition experiments, shifts in habitat choice in comparison with the previ- ously observed habitat choice, were determined when a native benthic fish species co-occurred with non-native gobiid species. Native C. perifretum displayed a significant shift in habitat choice in co-occurrence with the gobiids N. kessleri or P. semilunaris. C. perifretum was outcompeted and moved from the available shelter place to less preferred habitat types. During the competition experiments no change in habitat choice of B. barbatula was shown. Our study therefore suggests that competition for shelter is likely to occur in rivers invaded by N. kessleri and P. semilunaris at sites where shelter is limiting

关 键 词：BULLHEAD Exotic species Habitat choice Invasive gobies Rivers Rhine and Meuse Stone loach 

分 类 号：Q16[生物学—普通生物学] TU241[建筑科学—建筑设计及理论]