Habitat-based polymorphism is common in stream fishes.


Morphological differences (size and shape) across habitats are common in lake fish where differences relate to two dominant contrasting habitats: the pelagic and littoral habitat. Repeated occurrence of littoral and pelagic morphs across multiple populations of several lake fish species has been considered as important evidence that polymorphism is adaptive… (More)
DOI: 10.1111/1365-2656.12269
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