Browsing by Author "Bettencourt, R."
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- Metalloproteinase activity in the hemolymph of hydrothermal vent mussel Bathymodiolus azoricusPublication . Martins, I.; Company, Rui; Cerqueira, T.; Bebianno, Maria João; Santos, R.S.; Bettencourt, R.The extreme conditions present at the hydrothermal vent ecosystems such as, high temperature and pressure, high concentrations of trace metals, toxic gases such as methane (CH4), carbon dioxide (CO2) and hydrogen sulfide (H2S) could apparently be deleterious to the aerobic organisms. However, B. azoricus developed physiological strategies to cope with such inhospitable environment being the most successful and widespread species in the Mid Atlantic Ridge hydrothermal vents. Such remarkable adaptive response to environmental stressors must represent readjustments on normal biochemical reactions in order to maintain the integrity of cell function and metabolism. In bivalve molluscs, hemolymph and the circulating cells hemocytes, forms a primary line of defense against infectious agents and cellular stressful factors.
- Molecular insights indicate that Pachycara thermophilum (Geistdoerfer, 1994) and P. saldanhai (Biscoito and Almeida, 2004) (Perciformes: Zoarcidae) from the Mid-Atlantic Ridge are synonyms speciesPublication . Stefanni, S.; Porteiro, F. M.; Bettencourt, R.; Gavaia, Paulo J.; Santos, Ricardo SerrãoThe genus Pachycara comprises of 20 species distributed across the globe. Due to difficulties in collecting these fish, most of the species were described from single or few individuals. Until now, the systematics for these species has been based on traditional taxonomy and the only studies with molecular interest were performed on the Circum Antarctic Pachycara brachycephalum.