An Evaluation of Mark–Recapture Estimates of Black Crappie Population Size Determined by Trap-Netting during Fall and Spring in Minnesota Lakes
| Autor: | Michael C. McInerny, Timothy K. Cross |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
geography
geography.geographical_feature_category Ecology biology Population size Black crappie Sampling (statistics) Management Monitoring Policy and Law Aquatic Science biology.organism_classification Confidence interval Mark and recapture CLs upper limits Statistics Spring (hydrology) Environmental science Netting Ecology Evolution Behavior and Systematics |
| Zdroj: | North American Journal of Fisheries Management. 25:475-490 |
| ISSN: | 1548-8675 0275-5947 |
| Popis: | We evaluated mark–recapture population estimates of black crappies Pomoxis nigromaculatus 200 mm and longer made with trap-net catches during fall or spring in eight Minnesota lakes (18–168 ha). We estimated population size N during fall by use of marking and recapture in fall (FF estimates) and marking in fall and recapture during the following spring (FS estimates). We estimated spring N by use of marking and recapture after ice-out in early spring (ES estimates) and marking after ice-out and recapture during late spring (LS estimates). The FF and ES estimates were multiple-census estimates, whereas the FS and LS estimates were two-census estimates even though sampling occurred over many days. The most precise estimates were the LS estimates (median 95% confidence limits (CLs) were within 36% of 1/N), and FF estimates were least precise (median 95% CLs were within 51% of 1/N) among sampling scenarios. The median trap-net effort needed to achieve 95% CLs within 25% of 1/N estimates ranged from 1... |
| Databáze: | OpenAIRE |
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