Article (Scientific journals)
Limited possibilities for prezygotic barriers in the reproductive behaviour of sympatric Ophthalmotilapia species (Teleostei, Cichlidae)
Kever, Loïc; Parmentier, Eric; Derycke, S. et al.
2018In Zoology, 126, p. 71-81
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Keywords :
Cichlidae; Hybridisation; Ophthalmotilapia; Reproductive Behaviour; Sound
Abstract :
[en] Since prezygotic rather than postzygotic barriers are believed to maintain the diversity of closely related sympatric cichlids, differences in phenotypic traits and reproductive behaviours are likely involved in maintaining species boundaries. Here, we focused on the reproductive behaviour of three Ophthalmotilapia species with distributions that only overlap on a small stretch of the shore line of Lake Tanganyika. Repeated introgression of mitochondrial DNA between these species was previously reported, which suggested they can hybridise. Our aim is to test the hypothesis that reproductive behaviour acts as a prezygotic barrier that prevents frequent hybridisation in sympatric Ophthalmotilapia species. We performed a quantitative analysis of twelve reproductions (four for O. ventralis, six for O. nasuta, one for O. boops, and one between a female O. ventralis and a male O. nasuta). Although similar ethograms were obtained for these reproductions, the O. ventralis and O. boops males displayed a behaviour that was never performed by O. nasuta males. This behaviour was displayed during courtship and we called it 'invite'. In O. ventralis, we could show that it was associated with the emission of a single pulse sound. The comparison of O. nasuta and O. ventralis reproductive behaviours also revealed some quantitative differences: O. ventralis males showed the location of the bower more often to the female, whereas O. ventralis females followed the male more often. The similarity between the reproductive behaviours in O. ventralis and O. nasuta could explain the occurrence of the heterospecific spawning event recorded between an O. nasuta male and an O. ventralis female. Importantly, few eggs were laid and the maternal mouthbrooding that resulted from this heterospecific reproduction only lasted for two days, which suggested the abortion of egg development. Hence, in the absence of conspecifics, courtship and mating behaviours alone do not constitute perfect prezygotic barriers between these two species. © 2017 Elsevier GmbH.
Research center :
AFFISH-RC - Applied and Fundamental FISH Research Center - ULiège
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Zoology
Author, co-author :
Kever, Loïc ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Morphologie fonctionnelle et évolutive
Parmentier, Eric  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Morphologie fonctionnelle et évolutive
Derycke, S.;  Operational Directorate Taxonomy and phylogeny, Royal Belgian Institute of Natural Sciences, 1000 Brussels, Belgium, Department of Biology, Ghent University, 9000 Ghent, Belgium
Verheyen, E.;  Operational Directorate Taxonomy and phylogeny, Royal Belgian Institute of Natural Sciences, 1000 Brussels, Belgium
Snoeks, J.;  Section Vertebrates, Ichthyology, Royal Museum for Central Africa, 3080 Tervuren, Belgium, Laboratory of Biodiversity and Evolutionary Genomics, University of Leuven, 3000 Leuven, Belgium
Van Steenberge, M.;  Operational Directorate Taxonomy and phylogeny, Royal Belgian Institute of Natural Sciences, 1000 Brussels, Belgium, Section Vertebrates, Ichthyology, Royal Museum for Central Africa, 3080 Tervuren, Belgium, Laboratory of Biodiversity and Evolutionary Genomics, University of Leuven, 3000 Leuven, Belgium
Poncin, Pascal ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale
Language :
English
Title :
Limited possibilities for prezygotic barriers in the reproductive behaviour of sympatric Ophthalmotilapia species (Teleostei, Cichlidae)
Publication date :
2018
Journal title :
Zoology
ISSN :
0944-2006
Publisher :
Elsevier GmbH
Volume :
126
Pages :
71-81
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 10 June 2018

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