(1) Juvenile Andean toads (Bufo spinulosus) observed at m were markedly diurnal and more active during sunny days than cloudy days. (2) On a sunny. Reference for: Bufo spinulosus. Source: Amphibian Species of the World: an Online Reference, database (version 3). Acquired: Notes: Frost, Darrel R. Semiochemicals of Bufo spinulosus, the Andean toad Family: Bufonidae. Subfamily: Bufoninae. Genus: Bufo. Tribe: Author: Wiegmann.

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Contrary to our predictions, the individuals from different geographic localities presented similar AE values for both experimental diets.

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Nuestros resultados sugieren que para B. Rhinella spinulosa Conservation status. Views Read Edit View history.

Frogs in the Rhinella genus. The authors would also like to thank Dr.

In order to satisfy the normality requirements of the data, the assimilation efficiency were transformed using: Buufo spinulosa is a species of toad in the family Bufonidae that is found in the Andean ArgentinaBoliviaChileand Peru. The Tukey test HSD was used to establish differences among samples.

Behavioural thermoregulation of the Andean toad (Bufo spinulosus) at high altitudes.

Pablo Sabat and three anonymous referees for their constructive suggestions to the former version of this manuscript. This Bufonidae article is a stub. All toads attempted to maintain their diurnal sum of body temperature within a narrow range. Revista Chilena de Historia Natural Society for Experimental Biology Seminar Series We predict that tadpole feed with rich nutritional diet and growing at high temperature will show higher assimilation in comparison to tadpoles growing both a lower temperature and a nutritional apinulosus diet.


Table 1Fig.

International Union for Conservation of Nature. If the sky was clear, toads emerged from their hiding place and exposed themselves to solar radiation during h in the morning.

During the following 2 h, the feces produced by each gufo of tadpoles were collected with a Pasteur pipette. Therefore, if the larvae from different studied localities consume equivalent diets, it would be reasonable to assume that their digestive biochemical processes are similar Toloza a.

Assimilation efficiency of Bufo spinulosus tadpoles of different geographic origin, maintained at two temperatures: The possible geographic variation in the expression of attributes in amphibians, such as growth and its association with temperature, has only recently been included by some authors i.

Moreover, studies oriented toward understanding thermal acclimation at the population level are scarce Marquet el al. This increase in assimilation performance due to the increase of temperature would cancel bkfo negative effect that the decrease in transit time has on assimilation Elliot Journal of Comparative Physiology B: Following heliothermic heating during the moring toads retreated to the shade, thereby decreasing body temperature below air temperature.

In order to explore this possibility this effect, we spinuolsus a comparison of estimated marginal means of this interaction by locality, considering temperature and diet.

Quantitative models to predict the core temperature of toads under the different weather conditions demonstrated that the substrate temperature was the main energy source accounting bufi However, both experimental diets utilized are similar in composition i. For each temperature treatment and locality of origin, three replicates were used for each of two diet treatments: The AE values obtained for B.


International Review of Hydrobiology We hypnotized that in B. These latter values are comparable to our results for B.

Behavioural thermoregulation of the Andean toad (Bufo spinulosus) at high altitudes.

Taking into consideration this, our results suggest that the physiological adjustments in the rates of development of the different populations cannot be attributed to assimilation. The differences in size at metamorphosis in B spinulosus populations of distinct geographic origin could not be explained by the existence of differences in physiologic digestive capacities. However, the digestibility of the HQD is not spniulosus by temperature. Consequently thermoregulatory behaviour differed according to cloud cover and precipitation.

Take account the above information, we discard locality as a relevant factor in order to explain assimilation differences observed among tadpoles.

An Annual Review Our results suggest that the effect of temperature on digestive processes is more relevant than its effect on transit time in the digestive tract.

Hughes RN ed Diet selection: Bufo spinulosus larvae were collected from four localities from the northern and central zones of Chile: Evaporative cooling and preference of shady sites were employed to regulate body temperature below the morning levels in response to the constraints of water balance.

Retrieved 6 March Water in the containers was changed every 72 h and then the containers were randomly rearranged.