Interactions of slimy sculpin (Cottus cognatus) with native and nonnative trout: Consequences for growth
Canadian Journal of Fisheries and Aquatic Sciences
By: J. K. H. Zimmerman and B. Vondracek
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Abstract
We examined growth of native slimy sculpin (Cottus cognatus), native brook trout (Salvelinus fontinalis), and nonnative brown trout (Salmo trutta) to investigate potential interactions of a native nongame fish with native and nonnative trout. Enclosures (1 m2) were stocked with five treatments (juvenile brown trout with sculpin, juvenile brook trout with sculpin, and single species controls) at three densities. Treatments (with replication) were placed in riffles in Valley Creek, Minnesota, and growth rates were measured for six experiments. We examined the difference in growth of each species in combined species treatments compared with each species alone. We did not find evidence of interactions between brook trout and sculpin, regardless of density or fish size. However, sculpin gained greater mass when alone than with brown trout when sculpin were >16 g. Likewise, brown trout grew more when alone than with sculpin when brown trout were >24 g. In contrast, brown trout ???5 g grew more with sculpin compared with treatments alone. We suggest that native brook trout and sculpin coexist without evidence of competition, whereas nonnative brown trout may compete with sculpin. ?? 2006 NRC.
Suggested Citation
Zimmerman, J.K., and Vondracek, B., 2006, Interactions of slimy sculpin (Cottus cognatus) with native and nonnative trout: Consequences for growth: Canadian Journal of Fisheries and Aquatic Sciences, v. 63, no. 7, p. 1526-1535, https://doi.org/10.1139/F06-054.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Interactions of slimy sculpin (Cottus cognatus) with native and nonnative trout: Consequences for growth |
| Series title | Canadian Journal of Fisheries and Aquatic Sciences |
| DOI | 10.1139/F06-054 |
| Volume | 63 |
| Issue | 7 |
| Year Published | 2006 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Canadian Journal of Fisheries and Aquatic Sciences |
| First page | 1526 |
| Last page | 1535 |