Joana Teixeira Ferreira da Silva

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Aggression is a key component of the behavioral repertoire of animals that impacts on their Darwinian fitness. The available genetic tools in zebrafish make this species a promising vertebrate neurogenetic model for the study of neural circuits underlying aggressive behavior. For this purpose, a detailed characterization of the aggressive behavior and its(More)
The North-East Atlantic porbeagle (Lamna nasus) population has declined dramatically over the last few decades and is currently classified as 'Critically Endangered'. As long-lived, apex predators, they may be vulnerable to bioaccumulation of contaminants. In this study organohalogen compounds and trace elements were analysed in 12 specimens caught as(More)
Recent regulations have required European nations to report commercial landings of Rajidae (skates) to species level since 2008. Morphological similarities between some species, variability in colouration and regional differences in common names may compromise the accuracy of some of these data. An increased proportion of rajid landings reported by the U.K.(More)
In nature animals fight to acquire or defend vital resources such as food, shelter or access to mates. Aggressive behaviour is a quantifiable response to social stress, which is intrinsic to an individual and prevalent throughout the animal kingdom. In dyadic agonistic encounters, behaviour can be characterized by several specific behavioural patterns,(More)
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