Adult and juvenile coho salmon enumeration and coded-wire tag recovery analysis for Zolzap Creek, BC, 2004 / prepared by Bruce E. Baxter and Cheryl Y. Stephens.: Fs97-4/2730E-PDF

"As part of the Aboriginal Fisheries Strategy (AFS), a program was established for fisheries research in the Nisga'a Traditional Territory, British Columbia. One component of this large research initiative focused on the assessment of juvenile and adult coho populations in tributaries to the Nass River. Juvenile and adult coho enumeration studies have been conducted on Zolzap Creek since 1992. This report presents results for studies conducted at Zolzap Creek in 2004. The objectives of the research were to: 1. Enumerate migrating juvenile coho and estimate escapement; 2. Document the timing, size, and age distribution of migrating coho; 3. Mark coho smolts with coded-wire tags (CWT) to enable the determination of oceanic harvest rates; 4. Monitor the escapement for marked CWT adult coho, and determine ocean exploitation and survival rates; and 5. Collect water temperature and level data for future examination of the relationships between physical environmental factors and coho smolt migration timing, and between adult escapement and smolt production. Achievement of these objectives involved the construction and operation of in-stream, semi-permanent, panel fences located approximately 0.5 km upstream of the mouth of Zolzap Creek"--Introduction, page 1.

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