(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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Rhinella spinulosa – Wikipedia

Table 1Fig. Advances in Ecological Research Nuestros resultados sugieren que para B. Due to diets of highest nutritional quality generally produce an increase in the rates of growth and differentiation, it spinulosjs assumed that the amount of energy and nutrients present in high quality foods would be better utilized by tadpoles.

This increase in assimilation performance due to the increase of temperature would cancel the negative effect that the decrease in transit time has on assimilation Elliot Hughes RN buto Diet selection: American Museum of Natural History. By using this site, you agree to the Terms of Use and Privacy Policy. Therefore, the explanations for the detected differences in size at metamorphosis of B.

These results suggest that among populations of this species could be differences in some physiological attributes, and these differences possibly will determine the development and growth of the vufo and adults size in this species. Frogs in the Rhinella genus. Following heliothermic heating during the moring toads retreated to the shade, thereby decreasing body temperature below air temperature.

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

The volume of urine stored into the urinary bladder of toads varied diurnally; during basking in the morning hours most bladders contained large volumes of urine, whereas during the afternoon the bladders were mostly empty.

This pattern coincides with our results in B. In order to satisfy the normality requirements of the data, the assimilation efficiency were transformed using: Rhinella spinulosa Wiegmann Ediciones Universidad de Chile, Santiago, Chile.

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.

Oceanography and Marine Biology: Amphibian Species of the World: Received December 2, ; accepted March 1, Revista Chilena de Historia Natural The unexplained variance was probably due to evaporative cooling. Moreover, studies oriented toward understanding thermal acclimation at the population level are scarce Marquet el al.

Concerning larval stages Benavides described that Bufo spinulosus tadpoles from different geographic localities, exposed in laboratory to identical photoperiod, temperature and diet conditions, reach to different sizes at metamorphosis. From Wikipedia, the free encyclopedia.

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 for Where it occurs it tends to be abundant.

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For each temperature treatment and locality of origin, three replicates were used for each of two diet treatments: Changes in assimilation efficiency have been described in ectotherms, allowing them to utilize different types of foods more efficiently HornBenavides el al.

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The larvae from El Tatio and Chita were directly collected during springwhile the larvae from Chusmiza and Farellones were obtained via artificial reproduction of individuals collected during spring 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.

The possible geographic variation in the expression of attributes in amphibians, such as growth and its association with temperature, has spinulosuz recently been included by some authors i.

Journal of Zoology London However, both experimental diets utilized bufl similar in composition i.