Reproductive isolating barriers between colour-differentiated populations of an African annual killifish, Nothobranchius korthausae (Cyprinodontiformes)

0342467 - ÚBO 2011 RIV GB eng J - Journal Article
Reichard, Martin - Polačik, Matej
Reproductive isolating barriers between colour-differentiated populations of an African annual killifish, Nothobranchius korthausae (Cyprinodontiformes).
Biological Journal of the Linnean Society. Roč. 100, č. 1 (2010), s. 62-72. ISSN 0024-4066. E-ISSN 1095-8312
R&D Projects: GA ČR GP206/06/P152
Institutional research plan: CEZ:AV0Z60930519
Keywords : allopatric divergence * assortative mating * colour polymorphism * mating experience * premating barriers * reproductive isolation
Subject RIV: EG - Zoology
Impact factor: 2.166, year: 2010

We used choice and no-choice experiments to investigate reproductive isolation between two allopatric (island and mainland) and colour-differentiated populations of an African annual fish, Nothobranchius korthausae. Assortative mating under experimental conditions was limited and asymmetrical. Preference for sympatric males was only expressed in non-virgin females from one population. Virgin fish from both populations mated indiscriminately. No difference in the number of eggs laid, fertilization rate and hatching success was detected in no-choice experiments. No postmating barriers were detected in terms of performance and fertility of F1 hybrids.
Permanent Link: http://hdl.handle.net/11104/0185198