TY  - JOUR
A1  - Bierbach, David
A1  - Klein, Moritz
A1  - Sassmannshausen, Vanessa
A1  - Schlupp, Ingo
A1  - Riesch, Rüdiger
A1  - Parzefall, Jakob
A1  - Plath, Martin
T1  - Divergent evolution of male aggressive behaviour : another reproductive isolation barrier in extremophile poeciliid fishes?
T2  - International journal of evolutionary biology
N2  - Reproductive isolation among locally adapted populations may arise when immigrants from foreign habitats are selected against via natural or (inter-)sexual selection (female mate choice). We asked whether also intrasexual selection through male-male competition could promote reproductive isolation among populations of poeciliid fishes that are locally adapted to extreme environmental conditions [i.e., darkness in caves and/or toxic hydrogen sulphide (H(2)S)]. We found strongly reduced aggressiveness in extremophile P. oecilia mexicana, and darkness was the best predictor for the evolutionary reduction of aggressiveness, especially when combined with presence of H(2)S. We demonstrate that reduced aggression directly translates into migrant males being inferior when paired with males from non-sulphidic surface habitats. By contrast, the phylogenetically old sulphur endemic P. sulphuraria from another sulphide spring area showed no overall reduced aggressiveness, possibly indicating evolved mechanisms to better cope with H(2)S.
Y1  - 2011
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/25191
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-251910
SN  - 2090-052X
VL  - 2012
IS  - Article ID 148745
PB  - Sage-Hindawi
CY  - London [u.a.]
ER  -