Fisheries, Subsistence, and Habitat
Publications Searchable Database
Search Again| Division: | Sport Fish |
| Title: | Escapement estimation, spawner-recruit analysis, and escapement goal recommendation for fall chum salmon in the Yukon River drainage |
| Author: | Fleischman, S. J. and B. M. Borba |
| Year: | 2009 |
| Report ID: | Alaska Department of Fish and Game, Fishery Manuscript Series No. 09-08, Anchorage |
| Abstract: | Historical escapement and run size of fall chum salmon Oncorhynchus keta was reconstructed from incomplete sonar, weir, counting tower, mark-recapture, aerial survey, and foot survey data of varying precision from 1974 to 2007. The resulting estimates of drainagewide escapement were fitted to an age-structured Ricker spawner-recruit model. Bayesian statistical methods were employed, which allowed for realistic assessment of uncertainty in the presence of measurement error, serial correlation, and missing data. It is recommended that the existing drainagewide biological escapement goal of 300,000 to 600,000 be newly designated as a sustainable escapement goal, but that the upper and lower bounds not be changed. |
| Keywords: | chum salmon, Oncorhynchus keta, Yukon River, spawning abundance, age composition, escapement goal, run reconstruction, spawner-recruit analysis, maximum sustained yield, measurement error, serial correlation, missing data, Bayesian statistics, WinBUGS |