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You are here: Home / Associated publications / Belgian Journal of Zoology / Bibliographic References / Variation in sexual dimorphism between two populations of the Pyrenean salamander Euproctus asper from ecologically different mountain sites

J Serra-Cobo, F Uiblein and JP Martinez-Rica (2000)

Variation in sexual dimorphism between two populations of the Pyrenean salamander Euproctus asper from ecologically different mountain sites

BELGIAN JOURNAL OF ZOOLOGY, 130(1):39-45.

Morphological variation and ecological characteristics of habitats of two populations of the Pyrenean salamander Euproctus asper from the Flumen river, Prepyrenees, and the Salto del Pis torrent, Central Pyrenees, were studied to determine whether intraspecific differences in body form and sexual dimorphism occur and if they can be functionally related to ecological differences between the two study sites. While the Flumen river was found to be characterized by a Mediterrenean-influenced moderate mountain climate and high eutrophication. the Salto del Pis torrent represents a typical alpine habitat with long winters accompanied by snow cover, frequent avalanches, and short, mostly cool summers. Uni- and multivariate comparisons were performed on 12 size-adjusted measures of body form and weight from a total of 85 living specimens, grouped according to sex and geographic origin, Major differences were found mainly in those characters that manifest sexual dimorphism,hism. such as head size, tail length, tail depth, leg length, and body weight. Sexual dimorphism was more strongly expressed in the Central Pyrenean population where females showed longer tails and smaller heads, while males had mole robust rails and higher body weights compared with the Flumen population. Based on ecomorphological considerations and previous genetic studies, we argue that geographic divergence in sexual dimorphism of the Pyrenean salamander reflects longterm evolutionary adaptations in response to increased selection pressures favouring high reproductive efficiency and reduced intersexual competition under alpine, high-mountain climate conditions.

Urodela; mountain climate; morphometrics; body size; reproduction
BJZ

ISSN 2295-0451 (online version)
ISSN 0777-6279 (printed version)
impact factor 2015: 0,87.

Editor-in-Chief:
Prof. Dr. Isa Schön
Royal Belgian Institute of Natural Sciences
Vautierstraat 29
1000 Brussels, Belgium

 



1863-1903
Annales de la Société malacologique de Belgique
 
1903-1923
​Annales de la Société royale malacologique et zoologique de Belgique
 
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Annales de la Société Royale Zoologique de Belgique
 
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Belgian Journal of Zoology