<?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>N. Kajiwara</dc:contributor>
  <dc:contributor>M. E. Watanabe</dc:contributor>
  <dc:contributor>H. Nakata</dc:contributor>
  <dc:contributor>N. J. Thomas</dc:contributor>
  <dc:contributor>M. Stephenson</dc:contributor>
  <dc:contributor>David A. Jessup</dc:contributor>
  <dc:contributor>S. Tanabe</dc:contributor>
  <dc:creator>K. Kannan</dc:creator>
  <dc:date>2004</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;Concentrations of organochlorine pesticides, polychlorinated biphenyl (PCB)congeners, and butyltins were measured in sea otters and selected prey species (invertebrates) collected from the California (USA) coast. Polychlorinated biphenyls, DDTs (sum of&amp;nbsp;&lt;/span&gt;&lt;i&gt;p,p&lt;/i&gt;&lt;span&gt;′-dichlorodiphenyldichloroethylene [&lt;/span&gt;&lt;i&gt;p,p&lt;/i&gt;&lt;span&gt;-DDE],&amp;nbsp;&lt;/span&gt;&lt;i&gt;p,p&lt;/i&gt;&lt;span&gt;′-dichlorodiphenyldichloroethane [&lt;/span&gt;&lt;i&gt;p,p&lt;/i&gt;&lt;span&gt;-DDD], and&lt;/span&gt;&lt;i&gt;p,p&lt;/i&gt;&lt;span&gt;′-DDT), and butyltins were the major contaminants found in sea otters and their prey. Lipid-normalized concentrations of PCBs and DDT in sea otter livers were 60- and 240-fold greater than those found in the prey. Great biomagnification of PCBs and DDT in sea otters is suggested to result from their high per-capita intake of diet compared with those of other marine mammals. Profiles of PCB congeners in sea otters and prey species suggest a great capacity of sea otters to biotransform lower-chlorinated congeners. Sea otters seem to possess a greater ability than cetaceans to metabolize PCBs. The 2,3,7,8-tetrachlorodibenzo-&lt;/span&gt;&lt;i&gt;p&lt;/i&gt;&lt;span&gt;-dioxin equivalents of non- and mono-&lt;/span&gt;&lt;i&gt;ortho&lt;/i&gt;&lt;span&gt;&amp;nbsp;PCBs in sea otters and certain prey species were at or above the theoretical threshold for toxic effects.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1897/03-53</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Wiley</dc:publisher>
  <dc:title>Profiles of polychlorinated biphenyl congeners, organochlorine pesticides and butlyns in southern sea otters and their prey</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>