This study aimed to evaluate the effects of atenolol administration on salivary gland structure, redox status, and sialochemical composition in male rats. Male Wistar rats (Rattus norvegicus), aged 90 days, were randomly assigned to two groups: a control group receiving distilled water and an atenolol-treated group receiving 20 mg/kg/day by orogastric gavage for 30 days. On day 31, the animals were anesthetized, saliva was col...

Aim Under the H utchinsonian concept of the realized niche, biotic interactions and dispersal limitation may prevent species from fully occupying areas that they could tolerate physiologically. This can hamper the translation of physiological limits into climatically defined range limits and distorts inferences of evolutionary changes of the adaptive limits (i.e. niche conservatism). In contrast, heritable physiological limits...

Predicting the biodiversity impacts of global warming implies that we know where and with what magnitude these impacts will be encountered. Amphibians are currently the most threatened vertebrates, mainly due to habitat loss and to emerging infectious diseases. Global warming may further exacerbate their decline in the near future, although the impact might vary geographically. We predicted that subtropical amphibians should b...