Skip to Main Content
Habitat-dependent interactions between two size-classes of juvenile steelhead in a small streamAuthor(s): Bret C. Harvey; Rodney J. Nakamoto
Source: Canadian Journal of Fisheries and Aquatic Sciences 54(1): 27-31.
Publication Series: Miscellaneous Publication
PDF: View PDF (78 KB)
DescriptionAbstract - The presence of small steelhead (Oncorhynchus mykiss; averaging 55 mm fork length) influenced the growth of larger juvenile steelhead (90 mm fork length) during a 6-week experiment conducted in North Fork Caspar Creek, California, in summer 1994. In fenced replicate deep stream sections in this small stream, growth of the larger steelhead was greater in treatments in which small steelhead constituted half of the total biomass of fish than in treatments with an equal biomass comprised entirely of larger fish. In shallow habitats, growth of larger fish was lower in the presence of small fish. The growth of small fish was unaffected by the presence of larger juveniles and also was independent of habitat. Survival of both size-classes was high (70-90%) and unrelated to habitat or the presence of the other size-class. The advantage of large body size in intraspecific interactions among steelhead does not exist in all types of habitat, and interactions between the two size-classes may contribute to lower abundance of large juveniles in streams where aggradation reduces water depth.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationHarvey, Bret C.; Nakamoto, Rodney J. 1997. Habitat-dependent interactions between two size-classes of juvenile steelhead in a small stream. Canadian Journal of Fisheries and Aquatic Sciences 54(1): 27-31.
KeywordsPSW4351, Caspar Creek, juvenile steelhead, habitat, salmonids, watershed
- Effects of steelhead density on growth of Coho salmon in a small coastal California stream
- Assessing the potential for rainbow trout reproduction in tributaries of the Mountain Fork River below Broken Bow Dam, southeastern Oklahoma
- Temperature-dependent interactions between juvenile steelhead and Sacramento pikeminnow in laboratory streams
XML: View XML