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- W2155132302 abstract "Bahamas mosquitofish ( Gambusia hubbsi ) colonized blue holes during the past approximately 15 000 years and exhibit relatively larger caudal regions in blue holes that contain piscivorous fish. It is hypothesized that larger caudal regions enhance fast-start escape performance and thus reflect an adaptation for avoiding predation. Here I test this hypothesis using a three-pronged, experimental approach. First, G . hubbsi from blue holes with predators were found to possess both greater fast-start performance and greater survivorship in the presence of predatory fish. Second, using individual-level data to investigate the morphology–performance–fitness pathway, I found that (i) fish with larger caudal regions produced higher fast-start performance and (ii) fish with higher fast-start performance enjoyed greater survivorship in the presence of fish predators—trends consistently observed across both predator regimes. Finally, I found that morphological divergence between predator regimes at least partially reflects genetic differentiation, as differences were retained in fish raised in a common laboratory environment. These results suggest that natural selection favours increased fast-start performance in the presence of piscivorous fish, consequently driving the evolution of larger caudal regions. Combined with previous work, this provides functional insight into body shape divergence and ecological speciation among Bahamian blue holes." @default.
- W2155132302 created "2016-06-24" @default.
- W2155132302 creator A5078362450 @default.
- W2155132302 date "2009-05-01" @default.
- W2155132302 modified "2023-10-04" @default.
- W2155132302 title "Morphology, performance, fitness: functional insight into a post-Pleistocene radiation of mosquitofish" @default.
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- W2155132302 doi "https://doi.org/10.1098/rsbl.2009.0179" @default.
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