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<DIV id=productTitle sizset="5" sizcache="3">Marine Ecology</DIV>
<DIV class=articleDetails sizset="5" sizcache="3"><A
href="http://onlinelibrary.wiley.com/doi/10.1111/mae.2011.32.issue-4/issuetoc"
shape=rect><FONT color=#000000><SPAN id=volumeNumber>Volume 32</SPAN>, <SPAN
id=issueNumber>Issue 4</SPAN>, </FONT></A><SPAN id=issuePages>pages
480–487</SPAN>, <SPAN id=issueDate>December 2011</SPAN></DIV>
<DIV class=articleDetails sizset="5" sizcache="3"><SPAN>
<DIV id=publishedOnlineDate>Article first published online: 12 APR 2011</DIV>
<DIV id=doi>DOI: 10.1111/j.1439-0485.2011.00446.x</DIV></SPAN></DIV></DIV>
<DIV class=articleTitle> </DIV>
<DIV class=articleTitle><FONT size=4>Aggregational behavior of the blue mussels
<EM>Mytilus edulis</EM> and <EM>Mytilus trossulus</EM>: a potential pre-zygotic
reproductive isolation mechanism</FONT></DIV>
<DIV id=cr1>Guangxu Liu<SUP><FONT size=1>1</FONT></SUP>, Erin
Stapleton<SUP><FONT size=1>2</FONT></SUP>, David Innes<SUP><FONT
size=1>2</FONT></SUP>, Raymond Thompson<SUP><FONT size=1>3</FONT></SUP></DIV>
<DIV id=publishedOnlineDate><SUP>1</SUP> College of Animal Sciences, Zhejiang
University, Hangzhou, China<SUP>2</SUP> Department of Biology, Memorial
University of Newfoundland, St. John's, NL, Canada<SUP>3</SUP> Memorial
University of Newfoundland, Ocean Science Centre, St. John's, NL, Canada.
Correspondence: Guangxu Liu, E-mail: <!--TODO: clickthrough URL--><A
title="Link to email address" href="mailto:guangxu_liu@zju.edu.cn"
shape=rect><FONT color=#007e8a>guangxu_liu@zju.edu.cn</FONT></A></DIV>
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<UL id=footnotes><FONT color=#007e8a></FONT></UL>
<DIV id=publicationHistoryDetails jQuery1318644719307="10">
<H4>Abstract</H4></DIV></DIV></DIV>
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<DIV id=abstract>
<DIV class=para>
<P>The blue mussels <EM>Mytilus edulis</EM> and <EM>Mytilus trossulus</EM> occur
sympatrically and are able to hybridize in populations on the eastern coast of
Newfoundland, Canada, presenting an opportunity to study their aggregational
behavior. Aggregation behavior may therefore provide insight into
post-settlement interactions and pre-zygotic reproductive isolation between the
species. Three treatments were designed using <EM>M</EM>.<EM> edulis</EM>
and <EM>M</EM>.<EM> trossulus</EM> to investigate their intraspecific and
interspecific spatial distribution patterns. With Ripley’s K-function and Monte
Carlo simulation analysis, we found that in the single-species treatment,
<EM>M</EM>.<EM> edulis</EM> aggregated significantly but not
<EM>M</EM>.<EM> trossulus</EM>. Based on results of two-way ANOVAs, both
the number of aggregations and the moving distance were significantly affected
by the treatments (single-species or mixed-species treatment) and times (24, 48,
72 and 96 h). In further pairwise comparisons using Tukey’s test,
<EM>M. edulis</EM> aggregated differently with or without
<EM>M. trossulus</EM> occupying the same tank, suggesting that the
aggregational behavior of <EM>M. edulis</EM> could be driven by
species-specific chemical cues. The result that <EM>M. edulis</EM>
aggregates intraspecifically may increase the probability of intraspecific
fertilization of the spawned gametes and thus function as a pre-zygotic
reproductive isolation mechanism maintaining the blue mussel hybrid
zone.</P></DIV></DIV></DIV></DIV></FONT></DIV><BR>
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