L’article prend pour objet le conte transformé d’Anne Sexton, où la touche de poète se loge dans prologue, l’épilogue et les comparaisons frappantes. Le point commun étant mort apparente. Nous commençons avec « Briar Rose », analysons transe, régression remontée du temps, l’insomnie, mort. Puis nous tournons vers Snow White ses convergences, un regard The Double Image » enfin poème agissant com...

The wood frog, Rana sylvatica LeConte 1825, is a freeze-tolerant amphibian widely distributed in North America. Subarctic populations of this species can survive experimental freezing to temperatures below -16 °C, whereas temperate populations tolerate freezing only at temperatures above -6 °C. We investigated whether hepatocytes isolated from frogs indigenous to Interior Alaska (subarctic) or ...

The role of urea as a balancing osmolyte in osmotic adaptation is well known, but this 'waste product' also has myriad other functions in diverse taxa. We report that urea plays an important, previously undocumented role in freezing tolerance of the wood frog (Rana sylvatica), a northern woodland species that hibernates terrestrially in sites where dehydration and freezing may occur. Wood frogs...

Le film réalisé par Marina de Van sur un scénario Bertrand Santini est une adaptation globalement fidèle du conte Perrault « petit Poucet ». Les auteurs ont exploré sa richesse fantasmatique, notamment à travers la figure régressive l’ogre, support symbolique multiples transgressions (anthropophagie, inceste, pédophilie). Leur lecture met en lumière l’atemporalité tout autant qu’elle l’ancre da...

The Chiricahua leopard frog (Lithobates chiricahuensis) is in decline throughout the western United States, and is particularly sensitive to physical, chemical and biotic changes in their habitat. Acute toxicity tests revealed that among the metals detected in Chiricahua leopard frog habitat, copper was toxic at concentrations lower than those observed in the environment. Developing tadpoles we...

—Research on amphibian movement patterns can aid in strengthening amphibian conservation strategies. Yet for many species, there remain substantial gaps in our knowledge of such movement patterns. From 1999–2002, we documented movement patterns to and from breeding pools of both adult and juvenile Rana sylvatica LeConte (Wood Frog) and Ambystoma maculatum Shaw (Spotted Salamander) by using drif...

Wood frogs (Rana sylvatica) can accumulate substantial amounts of urea during fall and winter. In this study, maximal urea production capacity was examined in R. sylvatica collected at various times of the year and in response to experimental hyperuremia and dehydration. Activity and expression of carbamoyl phosphate synthetase I (CPS I), the hepatic regulatory enzyme of the urea cycle, were us...