Sample-size requirements for evaluating population size structure

North American Journal of Fisheries Management
By: , and 

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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.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Sample-size requirements for evaluating population size structure
Series title North American Journal of Fisheries Management
DOI 10.1577/1548-8675(2001)021<0660:SSRFEP>2.0.CO;2
Volume 21
Issue 3
Year Published 2001
Language English
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title North American Journal of Fisheries Management
First page 660
Last page 665
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