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Morphological differentiation of introduced pikeperch (Sander lucioperca L., 1758) populations in Tunisian freshwaters

Identifieur interne : 000E54 ( Istex/Corpus ); précédent : 000E53; suivant : 000E55

Morphological differentiation of introduced pikeperch (Sander lucioperca L., 1758) populations in Tunisian freshwaters

Auteurs : O. Turki-Missaoui ; M. M Etli ; M. M. Kraïem ; A. Chriki

Source :

RBID : ISTEX:4C98F423EB916AF750F41DA08B078A9C07983F77

Abstract

In order to evaluate the phenotypic plasticity of introduced pikeperch populations in Tunisia, the intra‐ and interpopulation differentiation was analysed using a biometric approach. Thus, nine meristic counts and 23 morphological measurements were taken from 574 specimens collected from three dams and a hill lake. The univariate (anova) and multivariate analyses (PCA and DFA) showed a low meristic variability between the pikeperch samples and a segregated pikeperch group from the Sidi Salem dam which displayed a high distance between mouth and pectoral fin and a high antedorsal distance. In addition, the Korba hill lake population seemed to have more important values of total length, eye diameter, maximum body height and a higher distance between mouth and operculum than the other populations. However, the most accentuated segregation was found in the Lebna sample where the individuals were characterized by high snout length, body thickness, pectoral fin length, maximum body height and distance between mouth and operculum. This study shows the existence of morphological differentiations between populations derived from a single gene pool that have been isolated in separated sites for several decades although in relatively similar environments.

Url:
DOI: 10.1111/j.1439-0426.2011.01748.x

Links to Exploration step

ISTEX:4C98F423EB916AF750F41DA08B078A9C07983F77

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<originInfo>
<publisher>Blackwell Publishing Ltd</publisher>
<place>
<placeTerm type="text">Oxford, UK</placeTerm>
</place>
<dateIssued encoding="w3cdtf">2011-10</dateIssued>
<edition>Received: May 7, 2010 Accepted: November 12, 2010</edition>
<copyrightDate encoding="w3cdtf">2011</copyrightDate>
</originInfo>
<language>
<languageTerm type="code" authority="rfc3066">en</languageTerm>
<languageTerm type="code" authority="iso639-2b">eng</languageTerm>
</language>
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<internetMediaType>text/html</internetMediaType>
<extent unit="figures">6</extent>
<extent unit="tables">9</extent>
</physicalDescription>
<abstract lang="en">In order to evaluate the phenotypic plasticity of introduced pikeperch populations in Tunisia, the intra‐ and interpopulation differentiation was analysed using a biometric approach. Thus, nine meristic counts and 23 morphological measurements were taken from 574 specimens collected from three dams and a hill lake. The univariate (anova) and multivariate analyses (PCA and DFA) showed a low meristic variability between the pikeperch samples and a segregated pikeperch group from the Sidi Salem dam which displayed a high distance between mouth and pectoral fin and a high antedorsal distance. In addition, the Korba hill lake population seemed to have more important values of total length, eye diameter, maximum body height and a higher distance between mouth and operculum than the other populations. However, the most accentuated segregation was found in the Lebna sample where the individuals were characterized by high snout length, body thickness, pectoral fin length, maximum body height and distance between mouth and operculum. This study shows the existence of morphological differentiations between populations derived from a single gene pool that have been isolated in separated sites for several decades although in relatively similar environments.</abstract>
<relatedItem type="host">
<titleInfo>
<title>Journal of Applied Ichthyology</title>
</titleInfo>
<genre type="journal">journal</genre>
<identifier type="ISSN">0175-8659</identifier>
<identifier type="eISSN">1439-0426</identifier>
<identifier type="DOI">10.1111/(ISSN)1439-0426</identifier>
<identifier type="PublisherID">JAI</identifier>
<part>
<date>2011</date>
<detail type="volume">
<caption>vol.</caption>
<number>27</number>
</detail>
<detail type="issue">
<caption>no.</caption>
<number>5</number>
</detail>
<extent unit="pages">
<start>1181</start>
<end>1189</end>
<total>9</total>
</extent>
</part>
</relatedItem>
<identifier type="istex">4C98F423EB916AF750F41DA08B078A9C07983F77</identifier>
<identifier type="DOI">10.1111/j.1439-0426.2011.01748.x</identifier>
<identifier type="ArticleID">JAI1748</identifier>
<accessCondition type="use and reproduction" contentType="copyright">© 2011 Blackwell Verlag, Berlin</accessCondition>
<recordInfo>
<recordContentSource>WILEY</recordContentSource>
<recordOrigin>Blackwell Publishing Ltd</recordOrigin>
</recordInfo>
</mods>
</metadata>
<serie></serie>
</istex>
</record>

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