首页 | 本学科首页   官方微博 | 高级检索  
   检索      


Spatial and Temporal Ecology of Native and Introduced Fish Larvae in Lower Putah Creek,California
Authors:Michael P Marchetti  Peter B Moyle
Institution:(1) Department of Wildlife, Fish and Conservation Biology, University of California Davis, Davis, CA, 95616, U.S.A.;(2) Department of Wildlife, Fish and Conservation Biology, University of California Davis, Davis, CA, 95616, U.S.A.
Abstract:For two years we studied the distribution and abundance of native and introduced fish larvae in Putah Creek (Yolo County, CA), a low elevation regulated stream. We used light traps and conical drift nets to sample the fish larvae at two spatially separated sites from March through July 1997 and at four sites from February through August 1998. Native larvae occurred both earlier in the year and in higher abundance than those of introduced species. Both native larvae and overall numbers of larvae were more abundant at upstream sites in both years. Sampling of larvae appeared to be sensitive to the detection of rare species. Drift nets and light traps collected similar numbers of larvae, but each method tended to select for different taxa. There were significant trends in diel patterns of abundance, with more fish larvae being found during the hours of darkness. We suggest that differences between the sites were due to habitat changes resulting from an upstream dam that has created a refuge of diverse habitat and cool flowing water for native taxa.
Keywords:ecology of larvae  drift of larvae  introduced species  native species  phenology  Yolo County
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号