Cet article se propose d’étudier la présence d’Alphonse Daudet dans Le Nouveau Décaméron. En 1884, le choix de Daudet, un écrivain médiatique situé au carrefour des écoles littéraires, s’impose à Catulle Mendès. effet, bien que devenu romancier, l’auteur Lettres mon moulin est conteur et causeur charmeur, ce qui s’accorde en tout point l’esprit du devient roi deuxième journée, avec Sapho comme ...

Background The scenario of a changing environment, widely termed as global change is mainly caused by human activities. Oil and carbon combustion, the use of chlorofluorocarbons, and deforestation are one of the main factors responsible for increasing CO2 concentration and for an increase of air temperature. In addition global changes will affect precipitation patterns, nitrogen concentration i...

We compared physiological characteristics and responses to experimental freezing and thawing in winter and spring samples of the wood frog, Rana sylvatica, indigenous to Interior Alaska, USA. Whereas winter frogs can survive freezing at temperatures at least as low as −16C, the lower limit of tolerance for spring frogs was between −2.5C and −5C. Spring frogs had comparatively low levels of the ...

Winter's advent invokes physiological adjustments that permit temperate ectotherms to cope with stresses such as food shortage, water deprivation, hypoxia, and hypothermia. We used liquid chromatography (LC) in combination with tandem mass spectrometry (MS/MS) quantitative isobaric (iTRAQ™) peptide mapping to assess variation in the abundance of hepatic proteins in summer- and winter-acclimatiz...

We report myiasis by Lucilia silvarum with an overall prevalence of 0.9% in amphibian populations in boreal Alberta. In the period 1998--1999, we documented L. silvarum infestations in wild populations of wood frog (Rana sylvatica), boreal chorus frog (Pseudacris maculata), boreal toad (Bufo boreas boreas), and Canadian toad (B. hemiophrys). We believe this is the first record of this parasite ...

Subarctic populations of the wood frog Rana sylvatica survive freezing to temperatures at least 10–13°C below those of more southerly conspecifics. This profound freeze tolerance is due in part to an enhanced glucosic cryoprotectant system that requires rapid mobilization of glucose from hepatocytes during the early hours of freezing. To determine if glucose transporter 2 (GLUT2) in the liver c...

Freeze tolerance in the wood frog, Rana sylvatica, is promoted by multiple, integrated physiological responses to ice forming within body tissues. By analyzing the freezing responses of the sympatric, but freeze intolerant, leopard frog (R. pipiens), we sought clues to the evolution of anuran freeze tolerance. Physiological responses critical to R. sylvatica's freeze tolerance, such as the synt...

The decline in amphibians across the globe has sparked a search for the causes, and recent evidence suggests a connection with pesticides. However, for most pesticides, tests on amphibians are rare and conducted only for short durations (1 to 4 days) and without natural stressors. Recent studies have discovered that the stress of predator cues in the water can make insecticides much more lethal...