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The ecological role of uncommon and endangered elasmobranch

Deficiencies in basic ecological information on uncommon and endangered elasmobranch fishes impair the assessment of their ecological role in marine ecosystems. In this study, we examined the...

Trade-off on shorebird eggshell colouration

In ground-nesting birds egg colour and appearance may have evolved due to opposite selection pressures. Pigmentation and spottiness make the eggs darker and have been suggested to improve...

Maternal kinship and fisheries interaction influence killer whale social structure

The primary prey of killer whales in the Strait of Gibraltar is the bluefin tuna. All killer whales observed in this area hunt tuna by chasing individual fish until they become exhausted and can be...

Comparing techniques for measuring corticosterone in tadpoles

Glucocorticoids play a key role in the stress response in vertebrates. In particular, corticosterone (CORT) is the main glucocorticoid in amphibians, birds, and reptiles.The most common methods for...

Noninvasive sampling of saliva for genetic analysis in ecology

Saliva is a secretion rich in epithelial cells and an excellent source of DNA for genetic analysis. Attempts to identify wild vertebrates from noninvasive samples of saliva have been restricted to...