Consulta: creatorFacets:"Nespolo,Roberto F."
Registros recuperados: 2
Data/hora: 11/06/2024 12:14:09

A time-energy analysis of daytime surface activity in degus, Octodon degus
Provedor de dados: Revista Chilena de Historia Natural
Autores: Kenagy,G.J.; Vásquez,Rodrigo A.; Nespolo,Roberto F.; Bozinovic,Francisco.
We present an analysis of time and energy allocation in a day-active caviomorph rodent, the degu, Octodon degus, in central Chile. We quantified components of surface activity in the field on a daily basis in individual degus near the time of the summer solstice, when conditions of heat and aridity were also at a seasonal extreme, in order to answer the following questions. Does the absolute time available for surface activity limit performance? Does the allocation of time and energy for locomotion place a functionally significant limitation on overall energy balance and performance? Degus spent about 2/3 of their above-ground time foraging; they remained stationary about 88 % of the time, walked around slowly about 10 %, and were running rapidly from one...
Tipo: Journal article
Palavras-chave: Time; Energy; Activity; Central Chile.
Ano: 2002
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000100014

The role of quantitative genetic studies in animal physiological ecology
Provedor de dados: Revista Chilena de Historia Natural
Autores: Artacho,Paulina; Castañeda,Luis E.; Nespolo,Roberto F.
Evolutionary physiology is a new discipline with roots in comparative physiology. One major change in the emergence of this discipline was an explicit new focus on viewing organisms as the evolutionary products of natural selection. The shift in research emphasis from comparative physiology to evolutionary physiology has resulted in physiological traits becoming important elements in broad research programs of evolution and ecology. Evolutionary quantitative genetics is a theory-based biological discipline that has developed the quantitative tools to test explicit evolutionary hypotheses. The role of quantitative genetics has been paramount, in studying the microevolution of morphology, behavior and life history, but not comparative physiology. As a...
Tipo: Journal article
Palavras-chave: Evolutionary physiology; Heritability; Directional selection differential; Response to selection; Fitness.
Ano: 2005
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000100012