Utilizing reflex impairment to assess the role of discard mortality in 'Size, Sex, and Season' management for Oregon Dungeness crab (Cancer magister) fisheries
| Autor: | Noëlle Yochum, Craig S. Rose, Allan W. Stoner, Alan Pazar, David B. Sampson, Robert Eder |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
biology 010604 marine biology & hydrobiology Mortality rate food and beverages 04 agricultural and veterinary sciences Aquatic Science biology.organism_classification 01 natural sciences Confidence interval Fishery Management strategy Recreational fishing Cancer magister 040102 fisheries Reflex 0401 agriculture forestry and fisheries Recreation Bay Ecology Evolution Behavior and Systematics |
| Zdroj: | Canadian Journal of Fisheries and Aquatic Sciences. 74:739-750 |
| ISSN: | 1205-7533 0706-652X |
| DOI: | 10.1139/cjfas-2016-0029 |
| Popis: | We found that crab discarded from Oregon (USA) commercial and recreational fisheries for Dungeness crab (Cancer magister) have lower postrelease mortality than previously estimated. This aligns with the goals of the “3-S” management strategy currently employed for these fisheries, to protect discarded sublegal male (Size), female (Sex), and soft-shell (Season) crab. We found that for the commercial ocean Dungeness fishery, overall discard mortality rates (5 days after release) were 0.080 (95% confidence interval: 0.061–0.100) for females; 0.012 (95% confidence interval: 0.002–0.022) for hard-shell males; and 0.092 (95% confidence interval: 0.026–0.157) for soft-shell males. The overall discard mortality rate for the recreational bay fishery (from a boat) was estimated to be 0.009 (95% confidence interval: 0–0.018). A reflex action mortality predictor relationship, which relates reflex impairment to mortality probability, was created and utilized to estimate mortality rates. Our study highlights the importance of looking not only at discard and mortality rates to evaluate 3-S fishery management, but also the mortality- and bycatch-per-retained ratios and temporal trends relative to changes in effort, animal condition, and catch composition. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|