Chemical alarm signals in wild Trinidadian guppies (<i>Poecilia reticulata</i>)
نویسندگان
چکیده
منابع مشابه
Local adaptation in Trinidadian guppies alters ecosystem processes.
Theory suggests evolutionary change can significantly influence and act in tandem with ecological forces via ecological-evolutionary feedbacks. This theory assumes that significant evolutionary change occurs over ecologically relevant timescales and that phenotypes have differential effects on the environment. Here we test the hypothesis that local adaptation causes ecosystem structure and func...
متن کاملRapid evolution of escape ability in Trinidadian guppies (Poecilia reticulata).
Predators are widely assumed to create selection that shapes the evolution of prey escape abilities. However, this assumption is difficult to test directly due to the challenge of recording both predation and its evolutionary consequences in the wild. We examined these events by studying natural and experimental populations of Trinidadian guppies, Poecilia reticulata, which occur in distinct hi...
متن کاملLife histories have a history: effects of past and present conditions on adult somatic growth rates in wild Trinidadian guppies.
1. Environmental conditions in the present, more recent past and during the juvenile stage can have significant effects on adult performance and population dynamics, but their relative importance and potential interactions remain unexplored. 2. We examined the influence of food availability at the time of sampling, 2 months prior and during the juvenile stage on adult somatic growth rates in wi...
متن کاملParallel and nonparallel behavioural evolution in response to parasitism and predation in Trinidadian guppies.
Natural enemies such as predators and parasites are known to shape intraspecific variability of behaviour and personality in natural populations, yet several key questions remain: (i) What is the relative importance of predation vs. parasitism in shaping intraspecific variation of behaviour across generations? (ii) What are the contributions of genetic and plastic effects to this behavioural di...
متن کاملFear, food and sexual ornamentation: plasticity of colour development in Trinidadian guppies.
The evolution of male ornamentation often reflects compromises between sexual and natural selection, but it may also be influenced by phenotypic plasticity. We investigated the developmental plasticity of male colour ornamentation in Trinidadian guppies in response to two environmental variables that covary in nature: predation risk and food availability. We found that exposure to chemical pred...
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ژورنال
عنوان ژورنال: Canadian Journal of Zoology
سال: 1999
ISSN: 1480-3283,0008-4301
DOI: 10.1139/cjz-77-4-562