Steelhead Supplementation Studies in Idaho Rivers: To evaluate the feasibility of using artificial production to increase natural steelhead populations and to collect baseline life history, genetic, and disease data from natural steelhead populations. 1993 Annual report

摘要

The Steelhead Supplementation Study was designed to evaluate the feasibility of using artificial production to increase natural steelhead Oncorhynchus mykiss populations and to collect baseline life history, genetic, and disease data from natural steelhead populations. To evaluate supplementation, the authors focused their experimental design on post-release survival, reproductive success, long-term fitness, and ecological interactions. They began field experiments in 1993 by outplanting hatchery adults and fingerlings to assess reproductive fitness and long-term survival. They snorkeled eight streams to estimate juvenile steelhead densities, recorded temperatures in 17 streams, and tagged natural steelhead in six streams with Passive Integrated Transponder (PIT) tags.