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Evaluation of the Rate of Evolution in Natural Populations of Guppies (Poecilia reticulata)
Natural populations of guppies were subjected to an episode of directional selection that mimicked natural processes. The resulting rate of evolution of age and size at maturity was similar to ratesExpand
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LIFE‐HISTORY EVOLUTION IN GUPPIES (POECILIA RETICULATA) 6. DIFFERENTIAL MORTALITY AS A MECHANISM FOR NATURAL SELECTION
We have previously reported a correlation between the life‐history patterns of guppies and the types of predators with which they coexist. Guppies from localities with an abundance of large predatorsExpand
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A possible non-sexual origin of mate preference: are male guppies mimicking fruit?
In most animals, the origins of mating preferences are not clear. The ‘sensory–bias’ hypothesis proposes that biases in female sensory or neural systems are important in triggering sexual selectionExpand
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Familiarity leads to female mate preference for novel males in the guppy, Poecilia reticulata
Guppies are a model vertebrate for studies of sexual selection and life history evolution. None the less, there have been few investigations of the factors responsible for maintaining extremeExpand
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Life-History Evolution in Guppies (Poecilia reticulata: Poeciliidae). IV. Parallelism in Life-History Phenotypes
In earlier publications, we reported an association between the life-history patterns of guppies and the types of predators with which they co-occur. We contrasted guppies from high-predation sitesExpand
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Multiple mating and sequential mate choice in guppies: females trade up
The trade–up hypothesis outlines a behavioural strategy that females could use to maximize the genetic benefits to their offspring. The hypothesis proposes that females should be more willing toExpand
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VARIATION IN THE DEMOGRAPHY OF GUPPY POPULATIONS:THE IMPORTANCE OF PREDATION AND LIFE HISTORIES
We compare the demography of natural populations of guppies (Poecilia reticulata) coexisting with two different communities of predators. In some populations, guppies co-occur with Rivulus hartii, aExpand
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Hastiness, brain size and predation regime affect the performance of wild guppies in a spatial memory task
The ability to return to, or avoid, specific locations is often critical to fitness-related activities. We tested for differences in spatial memory of guppies, Poecilia reticulata, from low- andExpand
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Visual pigment molecular evolution in the Trinidadian pike cichlid (Crenicichla frenata): a less colorful world for neotropical cichlids?
The Trinidadian pike cichlid (Crenicichla frenata) is a major predator of the guppy (Poecilia reticulata), a model system for visual ecology research, and visual predation by the pike cichlid isExpand
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Sexual colouration and sperm traits in guppies
The relationships among the area, hue, saturation and brightness of orange colouration and sperm traits in the guppy Poecilia reticulata were investigated. Males with greater areas of orangeExpand
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