Experimental studies have highlighted the potential in£uence of contaminants on marine mammal immune function and anthropogenic contaminants are commonly believed to in£uence the development of diseases observed in the wild. However, estimates of the impact of contaminants on wild populations are constrained by uncertainty over natural variation in disease patterns under di¡erent environmental conditions. We used photographic techniques to compare levels of epidermal disease in ten coastal populations of bottlenose dolphins (Tursiops truncatus) exposed to a wide range of natural and anthropogenic conditions. Epidermal lesions were common in all populations (a¡ecting 460% of individuals), but both the prevalence and severity of 15 lesion categories varied between populations. No relationships were found between epidermal disease and contaminant levels across the four populations for which toxicological data were available. In contrast, there were highly signi¢cant linear relationships with oceanographic variables. In particular, populations from areas of low water temperature and low salinity exhibited higher lesion prevalence and severity. Such conditions may impact on epidermal integrity or produce more general physiological stress, potentially making animals more vulnerable to natural infections or anthropogenic factors. These results show that variations in natural environmental factors must be accounted for when investigating the importance of anthropogenic impacts on disease in wild marine mammals.

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The results suggest a significant relationship between the LH and BMI. It is found that, the better the LH, the more appropriate is the BMI. This evidence reinforces the importance of promoting literacy for health to the Portuguese population.

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The activity presented in this article is intended for elementary school students and focus on the pioneering oceanographic work of the Portuguese King Carlos I. This activity involves the exploration of the exhibits belonging to two different science museums, the Aquarium Vasco da Gama and the Maritime Museum. Students were asked to study fish adaptations to deep sea, through the exploration of a fictional story, also based on historical data from the work of the King that served as a guiding script for all the subsequent tasks. In both museums, students had access to observations of: historical collections of organisms, oceanographic biological sampling instruments, fish gears and ships. They could also observe the characteristics and adaptations of diverse deep-sea fish species. The present study aimed to analyse the impact of this activity on students' scientific knowledge, on their understanding of the nature of science and on the development of transversal skills. All students considered the project very interesting.The obtained results suggest that the activity promoted not only the understanding of scientific concepts, but also the development of knowledge about science itself and the construction of scientific knowledge. This emphasizes the relevance of creating activities informed by the history of science. As a final remark we suggest that the partnership between elementary schools and museums should be seen as an educational project approach, in which the teacher has to assume a key, mediating role between the school and the museums.

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