Poecilia reticulata
- Integration between swim speed and mouth size evolves repeatedly in Trinidadian guppies and aligns with suction-feeding fishes
Summary: Integration between swim speed and mouth size is absent in ancestral but present in derived populations of guppies, suggesting mechanisms for the evolution of integrated performance in fishes.
- Selection for relative brain size affects context-dependent male preference for, but not discrimination of, female body size in guppies
Summary: Brain size and cognitive ability play a key role in mating decisions.