A1 Refereed original research article in a scientific journal
Hybridization in Calopteryx damselflies: the role of males
Authors: Tynkkynen K, Grapputo A, Kotiaho JS, Rantala MJ, Vaananen S, Suhonen J
Publisher: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD
Publication year: 2008
Journal:Animal Behaviour
Journal name in sourceANIMAL BEHAVIOUR
Journal acronym: ANIM BEHAV
Volume: 75
First page : 1431
Last page: 1439
Number of pages: 9
ISSN: 0003-3472
DOI: https://doi.org/10.1016/j.anbehav.2007.09.017
Abstract
Females are often considered responsible for hybridization between two species because usually they are the choosier sex and their cooperation is needed for successful copulation. However, males can also be responsible for hybridization, for example in species in which males are able to force copulation. We studied the pattern of hybridization in two congeneric damselfy species, Calopteryx splendens and Calopteryx virgo, and provide evidence that F-1 hybrids between the two damselfly species occur in the wild. According to mitochondrial DNA analysis, hybridization is reciprocal: five of seven hybrids were sired by C. splendens and two by C. virgo males. We conducted an experiment that revealed that males of both species have surprisingly poor premating reproductive isolation in that they accept heterospecific females, but C. splendens males were less discriminating against con- and heterospecific females than were C. virgo males. Moreover, our data on the number of hybrids sired by either species in the wild are congruent with the results of the discrimination experiment, supporting the conclusion that males may be responsible for the hybridization. Our results suggest that the males' role in hybridization studies should no longer be neglected. (C) 2007 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.
Females are often considered responsible for hybridization between two species because usually they are the choosier sex and their cooperation is needed for successful copulation. However, males can also be responsible for hybridization, for example in species in which males are able to force copulation. We studied the pattern of hybridization in two congeneric damselfy species, Calopteryx splendens and Calopteryx virgo, and provide evidence that F-1 hybrids between the two damselfly species occur in the wild. According to mitochondrial DNA analysis, hybridization is reciprocal: five of seven hybrids were sired by C. splendens and two by C. virgo males. We conducted an experiment that revealed that males of both species have surprisingly poor premating reproductive isolation in that they accept heterospecific females, but C. splendens males were less discriminating against con- and heterospecific females than were C. virgo males. Moreover, our data on the number of hybrids sired by either species in the wild are congruent with the results of the discrimination experiment, supporting the conclusion that males may be responsible for the hybridization. Our results suggest that the males' role in hybridization studies should no longer be neglected. (C) 2007 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.
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