| Abstract: | Fallfish (Semotilus corporalis) are the largest native cyprinid in the northeastern United States and are the most abundant native species in the Salmon River, New York. The Salmon River is a high-quality spawning and nursery river for Pacific salmon (Oncorhynchus spp.) migrating from Lake Ontario. Because of the large number of Pacific salmon spawning in the river in the fall extensive redd superimposition occurs resulting in salmonid eggs being available on the substrate. We examined the fall diet of 647 fallfish in 2007 and 2008 to determine the extent of predation on Pacific salmon eggs. The contribution of eggs in the diet significantly increased once fallfish attained a size of 100 mm total length. The largest size category of fallfish examined (≥150 mm) had the highest proportion (86.1%) of salmon eggs in their diet. The contribution of Zooplankton and chironomids in the diet of fallfish decreased with fish size. Except for the two largest groups of fallfish examined (i.e., 100–149 mm and ≥150 mm) diet overlap among size groups was low. The high contribution in the diet during the fall and high caloric value of Pacific salmon eggs could increase growth and survival of this species in the Salmon River. |
| Genre: | Article |
| ProdID: | 70035960 |
| Citation Author: | Johnson, J. H.; Nack, C. C.; Chalupnicki, M. A. |
| Citation Contributing Office: | Great Lakes Science Center |
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| Citation End Page: | 633 |
| Citation Issue: | 4 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Great Lakes Research |
| Citation LatN: | 45.0 |
| Citation LatS: | 40.5 |
| Citation LonE: | -71.86 |
| Citation LonW: | -79.76 |
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| Citation Phsyical Description: | 4 p. |
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| Citation Publisher: | International Association for Great Lakes Research |
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| Citation Search Results Text: | Predation by fallfish (Semotilus corporalis) on Pacific salmon eggs in the Salmon River, New York; 2009; Article; Journal; Journal of Great Lakes Research; Johnson, J. H.; Nack, C. C.; Chalupnicki, M. A. |
| Citation Start Page: | 630 |
| Citation Volume: | 35 |
| Citation Year: | 2009 |
| Type: | citation/reference |
| Text: | Predation by fallfish (Semotilus corporalis) on Pacific salmon eggs in the Salmon River, New York; 2009; Article; Journal; Journal of Great Lakes Research; Johnson, J. H.; Nack, C. C.; Chalupnicki, M. A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/j.jglr.2009.08.001 |
| Date Other: | Thu, 1 Jan 2009 00:00 -0600 |
| Publisher: | International Association for Great Lakes Research |
