| Abstract: | A method with an accompanying computer program is described to estimate the number of individuals needed to construct a sample length-frequency with a given accuracy and precision. First, a reference length-frequency assumed to be accurate for a particular sampling gear and collection strategy was constructed. Bootstrap procedures created length-frequencies with increasing sample size that were randomly chosen from the reference data and then were compared with the reference length-frequency by calculating the mean squared difference. Outputs from two species collected with different gears and an artificial even length-frequency are used to describe the characteristics of the method. The relations between the number of individuals used to construct a length-frequency and the similarity to the reference length-frequency followed a negative exponential distribution and showed the importance of using 300-400 individuals whenever possible. |
| Genre: | Article |
| ProdID: | 70023786 |
| Citation Author: | Vokoun, J. C.; Rabeni, C. F.; Stanovick, J. S. |
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| Citation End Page: | 665 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | North American Journal of Fisheries Management |
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| Citation Number Of Pages: | 6 |
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| Citation Search Results Text: | Sample-size requirements for evaluating population size structure; 2001; Article; Journal; North American Journal of Fisheries Management; Vokoun, J. C.; Rabeni, C. F.; Stanovick, J. S. |
| Citation Start Page: | 660 |
| Citation Volume: | 21 |
| Citation Year: | 2001 |
| Type: | citation/reference |
| Text: | Sample-size requirements for evaluating population size structure; 2001; Article; Journal; North American Journal of Fisheries Management; Vokoun, J. C.; Rabeni, C. F.; Stanovick, J. S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1577/1548-8675(2001)021<0660:SSRFEP>2.0.CO;2 |
| Date Other: | Mon, 1 Jan 2001 00:00 -0600 |
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