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- Title
Evaluation of four models for estimating the population size of largemouth bass in an experimental pond.
- Authors
Katano, Osamu
- Abstract
The utility of four commonly used models for estimating population size in teleosts was tested. Sixty-five individually marked largemouth bass, Micropterus salmoides, were introduced into a concrete pond. Fishing surveys were conducted every 2 days for a period of 19 days. The collected data were then used to estimate the population size under a variety of conditions using the following models: mark/recapture (Petersen method), DeLury (first model), and two models of the software program Capture. Comparison of the actual population size with population estimates obtained using the mark/recapture method showed that the percentage of absolute error was <30% in all cases in which the number of fish caught and marked in the first survey was >30% of the population. Using the DeLury method and Model 1 of Capture, the population estimates were biased toward underestimation, but the error was <30% when the number of fish caught in all surveys was >70%. In contrast, in Model 2 of Capture, the error was relatively small when the percentage of fish caught in all surveys was <70%. These conditions for minimizing errors should be taken into account by fisheries managers when estimating the population size of largemouth bass.
- Subjects
LARGEMOUTH bass; OSTEICHTHYES; POND aquaculture; FISHING surveys; AQUACULTURE
- Publication
Fisheries Science, 2010, Vol 76, Issue 5, p719
- ISSN
0919-9268
- Publication type
Article
- DOI
10.1007/s12562-010-0276-9