Life History, Distribution, Run Size And Angler Harvest Of Steelhead In The South Fork Trinity River Basin (Continued)
1. Creel surveys in the SFTR basin should continue during the 1991-92 Fiscal Year (FY) to document angler use. Additional information is needed on harvest rates, especially during low flow conditions.
2. Adult steelhead spawner surveys should begin by 1 March, weather permitting. Habitat types should be quantified during these surveys to document spawning area available to steelhead.
3. Steelhead spawning habitat studies, conducted in conjunction with the spawner surveys, should be continued throughout the basin. The quantification of available habitat will help us identify preference criteria.
4. The operation of the Alaskan-type weirs in Hayfork Creek and in the SFTR at Forest Glen to capture emigrant, post-spawning steelhead was effective and should continue.
5. Juvenile steelhead habitat utilization studies should continue, with like studies conducted during other seasons for comparison of seasonal habitat use by the various age groups.
6. Steelhead life history studies through OPRS scale analysis should continue, with emphasis on the juvenile freshwater phase, to assess the juvenile age structure in the basin and to determine if distinctive scale circuli patterns exist. Later, these should be compared to freshwater portions on adult scales to better understand the total life history patterns of steelhead within the SFTR basin.
The authors would like to thank Judith Jackson for assistance in preparing the tables for this report, Kevin Shaffer for OPRS scale analysis work, and all Natural Stocks Assessment Project personnel working in the SFTR basin for their assistance in fieldwork and data collection.
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APPENDIX 1. List of Julian weeks and their calendar date equivilants.
