<?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>EG Hinkle</dc:contributor>
  <dc:contributor>LE Yancy</dc:contributor>
  <dc:contributor>Jeffrey A. Falke</dc:contributor>
  <dc:creator>WT Samuel</dc:creator>
  <dc:date>2024</dc:date>
  <dc:description>&lt;div class="article-section__content en main"&gt;&lt;h3 id="nafm10956-sec-0001-title" class="article-section__sub-title section1"&gt;Objective&lt;/h3&gt;&lt;p&gt;Some graylings&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;i&gt;Thymallus&lt;/i&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;spp. possess an elongated dorsal fin and other morphological traits that can be sexually dimorphic, as demonstrated in the European Grayling&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;i&gt;T. thymallu&lt;/i&gt;s. North American Arctic Grayling&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;i&gt;T. arcticus&lt;/i&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;are assumed to follow these trends, but decisive evidence is lacking. This study aimed to determine whether sexually dimorphic characteristics, including posterior dorsal height, can be used to accurately predict the sex of Arctic Grayling in Interior Alaska.&lt;/p&gt;&lt;h3 id="nafm10956-sec-0002-title" class="article-section__sub-title section1"&gt;Methods&lt;/h3&gt;&lt;p&gt;We used computer imaging software to measure 22 morphometrics on 97 Arctic Grayling of known sex from streams in Interior Alaska, and we developed a set of binomial models to evaluate the validity of morphometrics as predictors of Arctic Grayling sex.&lt;/p&gt;&lt;h3 id="nafm10956-sec-0003-title" class="article-section__sub-title section1"&gt;Result&lt;/h3&gt;&lt;p&gt;Posterior dorsal height was a reasonably accurate predictor of sex (~90% accurate at fork lengths ≥300 mm), although models containing additional morphometrics were more accurate (100% accuracy at fork lengths ≥250 mm).&lt;/p&gt;&lt;h3 id="nafm10956-sec-0004-title" class="article-section__sub-title section1"&gt;Conclusion&lt;/h3&gt;&lt;p&gt;This study presents an affordable, noninvasive, and replicable method for nonlethal determination of Arctic Grayling sex by using digital images from the field, with potential application to other salmonids.&lt;/p&gt;&lt;/div&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1002/nafm.10956</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>American Fisheries Society</dc:publisher>
  <dc:title>Validating morphometrics as a nonlethal tool to determine Arctic Grayling sex</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>