Piebald Common Frogs Rana temporaria
نویسندگان
چکیده
منابع مشابه
Do common frogs ( Rana temporaria ) follow Bergmann ' s rule ?
Questions: Does intraspecific extension of Bergmann s rule – larger size within a species in cooler areas – hold true for ectotherms in general, and for the common frog (Rana temporaria) in particular? What is the relative importance of genetic and environmental factors (i.e. direct environmental induction) in determining latitudinal patterns of body size variation in common frogs? Methods: We ...
متن کاملPopulation genetic patterns suggest a behavioural change in wild common frogs (Rana temporaria) following disease outbreaks (Ranavirus).
We use 14 microsatellite loci to investigate the impact of a viral disease (Ranavirus) on the population genetic structure of wild common frogs (Rana temporaria). Populations with a history of Ranavirus mortalities (and 83% declines in the number of frogs) were compared with populations with no history of infection. Infected ponds showed significantly elevated F(IS) (homozygote excess), signifi...
متن کاملFast calcium currents in cut skeletal muscle fibres of the frogs Rana temporaria and Xenopus laevis.
Multiple types of voltage-gated Ca channels have been described in a variety of excitable cells (for a review see Tsien et al. 1987). Electrophysiological and biochemical properties of the slow Ca channels in skeletal muscle have been intensively studied during the last decade (for a review see Beaty et ai. 1987; Fosset and Lazdunski 1987). However, recently a fast low threshold Ca 2 + current ...
متن کاملPool desiccation and developmental thresholds in the common frog, Rana temporaria.
The developmental threshold is the minimum size or condition that a developing organism must have reached in order for a life-history transition to occur. Although developmental thresholds have been observed for many organisms, inter-population variation among natural populations has not been examined. Since isolated populations can be subjected to strong divergent selection, population diverge...
متن کاملThe influence of water and light upon the pigmentary system in the common frog Rana temporaria.
Many factors, both internal and external, influence the chromatic changes of coldblooded vertebrates, and of these, three external variables are recognized as significant—light, heat and moisture. The frog can change its colour, from brown or black through intermediate tints to pale lemon, by changing the contraction and expansion of three types of chromatophores—the epidermal and dermal melano...
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ژورنال
عنوان ژورنال: Herpetological Bulletin
سال: 2020
ISSN: 1473-0928
DOI: 10.33256/152.42