Peter D. Dijkstra
Central Michigan University
44 Papers
322 Citations
Peter D. Dijkstra is an academic researcher from Central Michigan University. The author has contributed to research in topics: Sexual selection & Cichlid. The author has an hindex of 18, co-authored 36 publications. Previous affiliations of Peter D. Dijkstra include University of Glasgow & Leiden University.
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Papers
Direct male-male competition can facilitate invasion of new colour types in Lake Victoria cichlids
TL;DR: It is hypothesised that red coloration confers an advantage in male-male competition, assisting red phenotypes to invade blue populations, and the apparently stable co-existence of red and blue incipient species in many populations of Lake Victoria cichlids is discussed.
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Male-male competition and speciation: aggression bias towards differently coloured rivals varies between stages of speciation in a Lake Victoria cichlid species complex.
TL;DR: Testing the aggression bias of wild‐caught territorial blue male cichlid fish from five separate populations shows that aggression bias varies between stages of speciation, but is not enough to stabilize the process of speciating.
Color polymorphism and intrasexual competition in assemblages of cichlid fish
Peter D. Dijkstra,Peter D. Dijkstra,Charlotte K. Hemelrijk,Ole Seehausen,Ole Seehausen,Ton G. G. Groothuis +5 more
TL;DR: This study studied experimental assemblages of red and blue color morphs of the Lake Victoria cichlid fish Pundamilia to suggest that male-male competition may be a significant force for maintaining phenotypic diversity.
The melanocortin system regulates body pigmentation and social behaviour in a colour polymorphic cichlid fish
Peter D. Dijkstra,Sean M. Maguire,Robert M Harris,Agosto A. Rodriguez,Ross DeAngelis,Stephanie A. Flores,Hans A. Hofmann +6 more
TL;DR: The effects of α-MSH on behaviour and body coloration, combined with morph-specific regulation of the stress response and the melanocortin system, suggest that the pigment regulates polymorphism in behaviour and coloration in A. burtoni.
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Territory quality affects female preference in a Lake Victoria cichlid fish
TL;DR: Experimental evidence is provided that differences in territory quality can override the female preference for males of her own colour in the Lake Victoria cichlid genus Pundamilia, critical for a recent hypothesis proposing that male competition for mating territories can facilitate the process of sympatric speciation by sexual selection.