Spatial and Temporal Ecology of Native and Introduced Fish Larvae in Lower Putah Creek, California

TitleSpatial and Temporal Ecology of Native and Introduced Fish Larvae in Lower Putah Creek, California
Publication TypeJournal Article
Year of Publication2000
AuthorsMarchetti, M. P., & Moyle P. B.
JournalEnvironmental Biology of Fishes
Volume58
Issue1
Pagination75-87
Date Published05/2000
ISSN0378-1909
Keywordsdrift of larvae, ecology of larvae, introduced species, native species, phenology, Yolo County
AbstractFor 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.
URLhttp://dx.doi.org/10.1023/A%3A1007676228910
DOI10.1023/A:1007676228910