期刊
LIMNOLOGICA
卷 59, 期 -, 页码 53-62出版社
ELSEVIER GMBH
DOI: 10.1016/j.limno.2016.05.001
关键词
Reproduction; Invasive; Spawning season; Drift strategy; Rutilus rutilus; Barbus barbus; Neogobius fluviatilis; Neogobius melanostomus; Ponticola kessleri
类别
资金
- Ministry for Climate Protection, Environment, Agriculture, Conservation and Consumer Protection of the State of North Rhine-Westphalia
Drift is described as a dispersal mechanism inherent in many freshwater fish species. The main aim of this study was a comprehensive description of drift patterns of three invasive gobies living in sympatry, and to compare these results with similar sampling efforts before the occurrence of invasive gobies at the River Rhine. More than 26,500 larvae and juvenile fishes were caught with drift nets in 2000 and 2012-2014. Though some species were missing in 2012-2014 (e.g. bullhead Cottus gobio and gudgeon Gobio gobio), only low differences were found in the drift of autochthones before and after the goby invasion with respect to abundances or sizes. Roach (Rutilus rutilus) and bighead goby (Ponticola kessleri) increased in size over the season, indicating a somewhat different drift strategy than for barbel (Barbus barbus), monkey goby (Neogobius fluviatilis) and round goby (N. melanostomus) that drifted over several months, but remained at a similar size. The drift data give a first indication that the potential impact of gobies in the River Rhine should act on other stages than on the very first larvae within the life-cycle of important members of the local fish communities. The data also clearly reveal that bighead goby is actually at the bust phase within typical boom-and-bust cycles of invasive species, while round and monkey goby have not yet left the boom phase so far at the Lower Rhine. (C) 2016 Elsevier GmbH. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据