<?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>John R. Sauer</dc:contributor>
  <dc:creator>Robert E. Reynolds</dc:creator>
  <dc:date>1991</dc:date>
  <dc:description>&lt;p&gt;We used breeding population, band recovery, and hunter harvest data to examine whether rates of productivity and harvest correlated with annual changes in mallard (&lt;i&gt;Anas platyrhynchos&lt;/i&gt;) breeding populations. Percent change in the size of the breeding population correlated positively with an index of production rate and negatively with an index of harvest rate (&lt;i&gt;R&lt;/i&gt;&lt;sup&gt;2&lt;/sup&gt; = 0.37, &lt;i&gt;F&lt;/i&gt; = 8.34,&lt;i&gt; P&lt;/i&gt; &amp;lt; 0.005). Average harvest rate indices did not differ (&lt;i&gt;W&lt;/i&gt; = 126, &lt;i&gt;P&lt;/i&gt; &amp;lt; 0.32) between periods of increasing (1961-69) and decreasing (1970-85) populations. Indices to production tended to be lower (&lt;i&gt;W&lt;/i&gt; = 143, &lt;i&gt;P&lt;/i&gt; &amp;lt; 0.08) during 1970-85 (&lt;span&gt;x̄&lt;/span&gt; = 0.064) compared to 1961-69 (&lt;span&gt;x̄&lt;/span&gt; = 1.096).&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.2307/3808979</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Wiley</dc:publisher>
  <dc:title>Changes in mallard breeding populations in relation to production and harvest rates</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>