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<DIV>Journal of Fish Biology</DIV>
<DIV class=articleDetails><A
href="http://onlinelibrary.wiley.com/doi/10.1111/jfb.2010.77.issue-10/issuetoc"
shape=rect><FONT color=#000000><SPAN id=volumeNumber>Volume 77</SPAN>, <SPAN
id=issueNumber>Issue 10</SPAN>, </FONT></A><SPAN id=issuePages>pages
2315–2325</SPAN>, <SPAN id=issueDate>December 2010</SPAN></DIV>
<DIV>Article first published online: 3 NOV 2010</DIV>
<DIV class="citation articleInformationHeader" id=doi
xmlns="http://www.w3.org/1999/xhtml">DOI: 10.1111/j.1095-8649.2010.02812.x</DIV>
<DIV class=articleTitle xmlns="http://www.w3.org/1999/xhtml"> </DIV>
<DIV class=articleTitle xmlns="http://www.w3.org/1999/xhtml"><FONT
size=4>Ontogenetic changes in the spatial learning capability of jack mackerel
<EM>Trachurus japonicus</EM></FONT></DIV>
<DIV class="citation articleInformationHeader" id=cr1
xmlns="http://www.w3.org/1999/xhtml">K. Takahashi, R. Masuda, Y. Yamashita</DIV>
<DIV class="citation articleInformationHeader" id=publishedOnlineDate
xmlns="http://www.w3.org/1999/xhtml">Maizuru Fisheries Research Station, Kyoto
University, Nagahama, Maizuru, Kyoto 625-0086, Japan</DIV>
<DIV id=correspondence style="CLEAR: left">*Correspondence: K. Takahashi,
Tel.: +81 773 62 5512; email: <!--TODO: clickthrough URL--><A
title="Link to email address" href="mailto:tkouji@kais.kyoto%E2%80%90u.ac.jp"
shape=rect><FONT color=#007e8a>tkouji@kais.kyoto-u.ac.jp</FONT></A></DIV>
<DIV class="citation articleInformationHeader"
xmlns="http://www.w3.org/1999/xhtml">
<DIV id=publicationHistoryDetails style="CLEAR: left" jQuery1292282346159="11">
<H4><SPAN><STRONG>Abstract</STRONG></SPAN></H4></DIV></DIV>
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<DIV id=abstract>
<DIV class=para>
<P>Ontogenetic changes in learning capability were studied in jack mackerel
<EM>Trachurus japonicus</EM> juveniles ranging from 20 to 95 mm standard length
(<EM>L</EM><SUB><FONT size=1>S</FONT></SUB>) collected from either pelagic or
coastal habitats. Simple spatial and reversal learning tasks were used to
estimate learning capability. There was no size dependence in the scores of
simple reward conditioning using a Y-maze, whereas the scores of reversal
learning tasks showed a clear sigmoidal curve of increase with an inflexion
point at 51·7 mm <EM>L</EM><SUB><FONT size=1>S</FONT></SUB>. The increase in
this learning capability coincided with the size at which juveniles recruit from
offshore pelagic to coastal rocky
habitats.</P></DIV></DIV></DIV></DIV></FONT></BODY></HTML>