Influence of habitat characteristics on shore-spawning kokanee

Transactions of the American Fisheries Society
By: , and 

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Abstract

Sockeye Salmon Oncorhynchus nerka and kokanee (lacustrine Sockeye Salmon) commonly spawn in both lentic and lotic environments; however, the habitat requirements of shore spawners are virtually unknown relative to those of stream spawners. A laboratory experiment and an in situ incubation study were conducted to better understand the influence of habitat characteristics on the shoreline incubation success of kokanee. The laboratory experiment assessed kokanee intragravel survival, fry emergence, and fry condition in response to eight substrate treatments. The in situ study, conducted at three major shoreline spawning sites in Lake Pend Oreille, Idaho, evaluated the effect of depth, substrate composition, dissolved oxygen, shoreline slope, and groundwater on intragravel survival. Substrate size composition was generally a poor predictor of survival in both the laboratory experiment and in situ study; although, fry condition and counts of emerged fry in the laboratory were lowest for the substrate treatment that had the highest proportion of fine sediment. Results of the in situ study suggest that groundwater flow plays an important role in enhancing intragravel survival in habitats generally considered unsuitable for spawning.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Influence of habitat characteristics on shore-spawning kokanee
Series title Transactions of the American Fisheries Society
DOI 10.1080/00028487.2014.931302
Volume 143
Issue 6
Year Published 2014
Language English
Publisher American Fisheries Society
Contributing office(s) Coop Res Unit Seattle
Description 15 p.
First page 1404
Last page 1418
Online Only (Y/N) N
Additional Online Files (Y/N) N
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