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Thermal Ecology Of Pleurodema thaul (Amphibia: Leptodactylidae) Gayana
ITURRA-CID,MYRIAM; VIDAL,MARCELA; LABRA,ANTONIETA; ORTIZ,JUAN CARLOS.
The biodiversity of the entire planet is threatened by global warming, and among vertebrates, Amphibia is the taxon most negatively affected by this problem. Amphibians depend on an external heat source to achieve and maintain an adequate body temperature, which has a significant impact on their fitness. Therefore, an increase in the average environmental temperature will affect, probably in a negative way, the general performance of amphibians. This makes it imperative to increase our scarce knowledge of amphibian thermoregulation. The aim of this work is to contribute to the knowledge of amphibian thermoregulation by studying the winter thermal ecology of one of the most widely distributed species in Chile, Pleurodema thaul. Individuals were collected...
Tipo: Journal article
Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382014000100004
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The eye-bulging in Liolaemus lizards (Weigmann 1843) Gayana
REYES-OLIVARES,CLAUDIO; RAIN-GARRIDO,INGER; LABRA,ANTONIETA.
It is described for the first time the eye-bulging display in two liolaemid lizards, Liolaemus chiliensis and L. gravenhorstii. This display occurs in very low frequency and it was observed in captivity. It is discussed the possibility that the thermoregulation and/or eye-cleaning hypotheses may explain the occurrence of this display in these two species.
Tipo: Journal article
Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382016000100013
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Intraspecific variation in a physiological thermoregulatory mechanism: the case of the lizard Liolaemus tenuis (Liolaeminae) RChHN
VIDAL,MARCELA A; ORTIZ,JUAN CARLOS; LABRA,ANTONIETA.
The interspecific variation of heating rates in Liolaemus lizards, suggests an adaptive value of this physiological thermoregulatory mechanism, which would allow lizards to cope with the environmental thermal restrictions, imposed to behavioral thermoregulation. This trend has barely been tested at intraspecific level, and here we explore if intraspecific variation in heating rates occurs in Liolaemus tenuis, a relative widely distributed species from central Chile. We test the hypothesis that heating rates are related to the thermal environmental conditions at which populations are exposed, by comparing the heating rates of three populations (from a latitudinal range), which inhabit under different thermal conditions. Additionally, we explore if the...
Tipo: Journal article Palavras-chave: Geographic variation; Sexual variation; Thermoregulation.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000200002
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Development of behavioral studies in Chile between 1984 and 1998 RChHN
LABRA,ANTONIETA; RAMIREZ,CLAUDIO C.; NIEMEYER,HERMANN M..
The development and the current state of behavioral studies in Chile was analyzed considering articles on Chilean fauna published between 1984 and 1998 (203 articles). The number of articles on the subject of animal behavior has increased significantly along the period studied, indicating an increasing interest on this research. However, the international impact of Chilean research has been comparatively low. Proposals to stimulate the development of this research area in Chile are: i) that main research universities in Chile recruit well-trained behavioral ecologists. This will have immediate impact by increasing the number of courses in animal behavior, which will attract a new generation of biology students into this area, promoting the persistence and...
Tipo: Journal article Palavras-chave: Animal behavior studies; Chilean fauna.
Ano: 2000 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000300001
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Sexual and age differences in ecological variables of the lizard Microlophus atacamensis (Tropiduridae) from northern Chile RChHN
VIDAL,MARCELA; ORTIZ,JUAN CARLOS; LABRA,ANTONIETA.
Microlophus is a lizard genus of South-America which has many species with sexual size dimorphism. An ecological study was performed on M. atacamensis, a species inhabiting the intertidal zone of the coast of northern Chile. The following questions were addressed: (1) does M. atacamensis exhibit sexual dimorphism? (2) do individuals of different age and sex segregate spatially? (3) do individuals of different age and sex use different type of microhabitat? and (4) do individuals of different sexes exhibit differences in thermoregulatory characteristics? The study was conducted in different localities from northern Chile, which include two types of rocky systems used by this species, a high and a low type. At the moment of lizard capture, type of...
Tipo: Journal article Palavras-chave: Tropiduridae; Microlophus atacamensis; Sexual dimorphism; Thermoregulation; Spatial segregation; Chile.
Ano: 2002 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000200002
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