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Movement and feeding ecology of recently emerged steelhead in Lake Ontario tributaries
Article first published online: 18 SEP 2012
Published 2012. This article is a U.S. Government work and is in the public domain in the USA.
Journal of Applied Ichthyology
Volume 29, Issue 1, pages 221–225, February 2013
How to Cite
Johnson, J. H., McKenna, J. E. and Douglass, K. A. (2013), Movement and feeding ecology of recently emerged steelhead in Lake Ontario tributaries. Journal of Applied Ichthyology, 29: 221–225. doi: 10.1111/jai.12032
- Issue published online: 10 JAN 2013
- Article first published online: 18 SEP 2012
- Manuscript Accepted: 10 MAY 2012
- Manuscript Received: 2 DEC 2011
Steelhead (Oncorhynchus mykiss) ascend several Lake Ontario tributaries to spawn and juveniles are often the most abundant salmonid where spawning is successful. Movement and diet of recently emerged subyearling steelhead were examined in three New York tributaries of Lake Ontario. Downstream movement occurred mainly at night and consisted of significantly smaller fry that were feeding at lower levels than resident fry. Fry fed at the highest rate during the day and chironomids and baetids were the main components of their diet. The diet composition of steelhead fry was closely associated with the composition of the benthos in Trout Brook but more similar to the composition of the drift in the other streams. Daily ration was similar among streams, ranging from 10.2 to 14.3%. These findings are consistent with previous findings on the ecology of steelhead fry, as well as fry of other salmonid species.