Derivation of safety factors for setting harvest quotas on adult walleyes from past estimates of abundance
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Abstract
Past population estimates of adult walleyes Stizostedion vitreum can be used to set harvest quotas, provided that temporal variability in abundance of adult walleyes is accounted for. We used a long-term data set from Escanaba Lake, Wisconsin, to evaluate the accuracy of past population estimates for setting current-year quotas for adult walleyes. The results from Escanaba Lake were corroborated by comparison with other lakes where adult walleye abundance was estimated in more than 1 year. The accuracy of estimates of adult walleye abundance declined over time from the year the estimate was obtained to the year it was used to set a harvest quota. We derived safety factors for application to past estimates of population size; these factors limit the occurrence of an exploitation rate exceeding the maximum sustainable rate (35%) to approximately 1 in 40. These safety factors declined from 35% for 1-year-old estimates to less than 20% for 10-year-old estimates.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Derivation of safety factors for setting harvest quotas on adult walleyes from past estimates of abundance |
| Series title | Transactions of the American Fisheries Society |
| DOI | 10.1577/1548-8659(1991)120<0620:DOSFFS>2.3.CO;2 |
| Volume | 120 |
| Issue | 5 |
| Year Published | 1991 |
| Language | English |
| Publisher | Taylor & Francis |
| Contributing office(s) | Great Lakes Science Center |
| Description | 9 p. |
| First page | 620 |
| Last page | 628 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |