<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>C.F. Rabeni</dc:contributor>
  <dc:contributor>J.S. Stanovick</dc:contributor>
  <dc:creator>J.C. Vokoun</dc:creator>
  <dc:date>2001</dc:date>
  <dc:description>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.</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1577/1548-8675(2001)021&lt;0660:SSRFEP&gt;2.0.CO;2</dc:identifier>
  <dc:language>en</dc:language>
  <dc:title>Sample-size requirements for evaluating population size structure</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>