Predation Risks
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Regulation of foraging areas and structuring of termite communities / Regulação de areas de forrageamento e estruturação de comunidades de cupins
The use of habitats by animals depends on the balance of costs and bene ts associated to foraging, like availability of resources and negative interactions. Termites (Insecta: Isoptera) are detritivorous organisms with great economic and ecological importance. However, the mechanisms that structure their communities are not completely known. So, the objectiv
Publicado em: 2009
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2. Reproductive ecology of two species of Leptodactylus and the evolution of morphological, behavioural and ecological characters in the L. pentadactylus species group (Anura, Leptodactylidae) / Ecologia reprodutiva de duas espécies de Leptodactylus e a evolução de caracteres morfológicos, comportamentais e ecológicos no grupo de L. pentadactylus (Anura, Leptodactylidae)
Historical Ecology unifies concepts in ecology, behavior and phylogeny. To determine the evolutionary context of reproductive characters within the Leptodactylus pentadactylus species group and also to explore questions such as predation and habitat selection, I described the reproductive ecology of two key species, L. labyrinthicus and L. syphax) (Anura, Le
Publicado em: 2009
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3. Fat reserves and perceived predation risk in the great tit, Parus major.
The fat reserves of small birds are built up daily as insurance against starvation. They are believed to reflect a trade-off between the risks of starvation and predation such that in situations of high predation risk birds are expected either to reduce their fat reserves in response to mass-dependent predation risk or to increase them in response to foragin
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4. Adaptive plasticity in hatching age: a response to predation risk trade-offs.
The life histories of many animals are characterized by niche shifts, the timing of which can strongly affect fitness. In the tree frog Agalychnis callidryas, which has arboreal eggs, there is a trade-off between predation risks before and after hatching. When eggs are attacked by snakes, tadpoles escape by hatching rapidly and falling into the water below.
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5. Sexual selection affects local extinction and turnover in bird communities
Predicting extinction risks has become a central goal for conservation and evolutionary biologists interested in population and community dynamics. Several factors have been put forward to explain risks of extinction, including ecological and life history characteristics of individuals. For instance, factors that affect the balance between natality and morta
The National Academy of Sciences.