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<DIV><A href="http://www3.interscience.wiley.com/journal/118505868/home"><FONT
color=#000000>Invertebrate Biology</FONT></A></DIV>
<DIV class=volIss><A
href="http://www3.interscience.wiley.com/journal/123444003/issue"><FONT
color=#000000>Volume 129 Issue
2</FONT></A>, Pages 172 - 183</DIV>
<DIV class=pubOnline>Published Online: 4 Mar 2010</DIV>
<DIV class=line xmlns:jencode="java.net.URLEncoder"> </DIV>
<DIV class=title-document xmlns="http://www.w3.org/1999/xhtml"><FONT
size=4>Paralarvae of the jumbo squid, <SPAN class=i><EM>Dosidicus
gigas</EM></SPAN></FONT></DIV>
<DIV class=author-info xmlns="http://www.w3.org/1999/xhtml"><SPAN
class=name><SPAN class=forenames>Jorge E.</SPAN> <SPAN
class=surname>Ramos-Castillejos</SPAN> <SUP><NOBR>1</NOBR></SUP> </SPAN>, <SPAN
class=name><SPAN class=forenames>César A.</SPAN> <SPAN
class=surname>Salinas-Zavala</SPAN> <SUP><NOBR>1</NOBR></SUP> <A
href="http://www3.interscience.wiley.com/journal/123310396/abstract#fn1"><FONT
color=#000000><SUP><NOBR>a</NOBR></SUP> </FONT></A></SPAN>, <SPAN
class=name><SPAN class=forenames>Susana</SPAN> <SPAN
class=surname>Camarillo-Coop</SPAN> <SUP><NOBR>1</NOBR></SUP> </SPAN>, and <SPAN
class=name><SPAN class=forenames>Luis M.</SPAN> <SPAN
class=surname>Enríquez-Paredes</SPAN> <SUP><NOBR>2</NOBR></SUP> </SPAN></DIV>
<DIV class=addresses xmlns="http://www.w3.org/1999/xhtml"><SPAN class=address><A
class=invisible-anchor name=a1> </A><SPAN id=a1> <SPAN
class=number><SUP><NOBR>1</NOBR></SUP> </SPAN>Northwestern Center for Biological
Research, La Paz, B.C.S. 23090, Mexico</SPAN> <BR><A class=invisible-anchor
name=a2> </A><SPAN id=a2> <SPAN class=number><SUP><NOBR>2</NOBR></SUP>
</SPAN>Faculty of Marine Sciences, Autonomous University of Baja California
(UABC), Ensenada, B.C. 22870, Mexico</SPAN> </SPAN></DIV>
<DIV class=para xmlns="http://www.w3.org/1999/xhtml"><A class=invisible-anchor
name=fn1> </A><SPAN id=fn1> <SUP><NOBR>a</NOBR></SUP> Author for
correspondence. E-mail: <A class=externallink
href="mailto:csalinas@cibnor.mx"><FONT
color=#000000>csalinas@cibnor.mx</FONT></A></SPAN> </DIV>
<DIV class=bpg40copyright xmlns="http://www.w3.org/1999/xhtml"> </DIV>
<DIV class=abstract-title id=Abstract>ABSTRACT</DIV>
<DIV class=abstract-content xmlns="http://www.w3.org/1999/xhtml"
xmlns:jencode="java.net.URLEncoder" xmlns:md="urn:mdransfi-functions"
xmlns:f="http://wiley.com/wispers/content/function"
xmlns:xs="http://www.w3.org/2001/XMLSchema">
<P class=para>The rhynchoteuthion stage of the jumbo squid, <SPAN
class=i><EM>Dosidicus gigas</EM></SPAN>, has morphological characteristics
similar to the paralarvae of the purpleback squid, <SPAN
class=i><EM>Sthenoteuthis oualaniensis</EM></SPAN>, making it difficult to
determine the locations, seasons, and conditions where spawning of jumbo squid
occurs. In this study, 180 paralarvae of <SPAN class=i><EM>D. gigas</EM></SPAN>
were collected off the west coast of the Baja California peninsula and
identified by sequencing a 369-bp fragment of the cytochrome oxidase I gene. Of
these, 77 specimens, 0.8–6.0 mm in mantle length, were described. Indices
based on morphometric ratios were used to determine whether the shapes of
different body structures were reliable for identifying the paralarvae. For two
ratios, the results appear to discriminate members of <SPAN class=i><EM>D.
gigas</EM></SPAN> from those of <SPAN class=i><EM>S. oualaniensis</EM></SPAN>.
Additionally, eye or intestinal photophores were not observed in any paralarvae
of <SPAN class=i><EM>D. gigas</EM></SPAN>. Morphological and morphometric
information provided a valuable basis for the discrimination and identification
of these two species.</P></DIV></FONT></BODY></HTML>