Kelt Reconditioning: A Research Project to Enhance Iteroparity in Columbia Basin Steelhead (Oncorhynchus mykiss), 2001 Annual Report.
Repeat spawning is a life history strategy that is expressed by some species from the family Salmonidae. Rates of repeat spawning for post-development Columbia River steelhead (Oncorhynchus mykiss) populations range from 1.6 to 17%. It is expected that currently observed iteroparity rates for wild steelhead in the Basin are artificially and in some cases severely depressed due to development and operation of the hydropower system and various additional anthropogenic factors. Increasing the natural expression of historical repeat spawning rates using fish culturing means could be a viable technique to assist the recovery of depressed steelhead populations. Reconditioning is the process of culturing post-spawned fish (kelts) in a captive environment until they are able to reinitiate feeding, growth, and again develop mature gonads. Kelt reconditioning techniques were initially developed for Atlantic salmon (Salmo salar) and sea-trout (S. trutta). The recent Endangered Species Act listing of many Columbia Basin steelhead populations has prompted interest in developing reconditioning methods for wild steelhead populations within the Basin. To address recovery, we captured wild emigrating steelhead kelts from the Yakima River and tested reconditioning and the effects of several diet formulations on its success at Prosser Hatchery on the Yakama Reservation. Steelhead kelts from themore »
- Publication Date:
- OSTI Identifier:
- Report Number(s):
R&D Project: 200001700; TRN: US200720%%335
- DOE Contract Number:
- Resource Type:
- Technical Report
- Research Org:
- Columbia River Inter-Tribal Fish Commission.
- Sponsoring Org:
- United States. Bonneville Power Administration.
- Country of Publication:
- United States
- 13 HYDRO ENERGY; 54 ENVIRONMENTAL SCIENCES; ADULTS; COLUMBIA RIVER; DOCUMENTATION; ENDANGERED SPECIES; FEEDING; FEMALES; FISH PASSAGE FACILITIES; FOOD; FORMALDEHYDE; GONADS; JUVENILES; PARASITES; PELLETS; REARING; RIVERS; SALMON; TANKS; TELEMETRY; TROUT; Steelhead (Fish) - Spawning - Washington (State) - Yakima River Watershed
Enter terms in the toolbar above to search the full text of this document for pages containing specific keywords.