SAMS

The rapid worldwide expansion of marine bivalve aquaculture has lead to a growing demand for hatchery production of seed. Increase in this production has however been hampered by a lack of physiological synchrony of individuals, with difficulties in 1) conditioning of broodstock and predicting when they will spawn, 2) metamorphosis of larvae into spat. The overall research objective of Neuroshell is to advance knowledge on the environmental, neuroendocrine and endocrine control of these key stages in bivalves. This will be done through a daily rhythms approach, by investigating the effect of daily environmental cycles on reproduction (sub-project 1) and metamorphosis (sub-project 2), and generating a profile of target neuroendocrine/endocrine factors at given stages under these conditions. Then determining whether these factors too exhibit daily rhythmicity. Work will be performed on the European oyster, Ostrea edulis, through in vivo experiments. Neuroshell is multidisciplinary and intersectoral, combining physiological, biochemical and molecular techniques with shellfish aquaculture and industry integration. It also includes a secondment in Spain. Transfer of knowledge and comprehensive training of the researcher are key elements of the action. The core focus of the researcher to date has been on reproductive neuroendocrinology and physiology in fish species for commercial aquaculture. To broaden her research scope dramatically, the project has been developed with the Scottish Association of Marine Science UK (host), to enable her to gain knowledge, skills, competencies, experience and contacts in an entirely new group of species of major commercial importance. Overall, results have the potential capacity to advance hatchery production of marine bivalves and fundamental science, and promote the researcher to a level of professional maturity and independence. Ultimately contributing to the excellence and competitiveness of EU aquaculture research and industry.

With this project, called HADES, we aim to provide the first detailed, combined analysis of benthic diagenesis and microbial ecology of some of the deepest oceanic trenches on Earth. We argue that deep trenches, some of the most remote, extreme, and scantly explored habitats on Earth, are hotspots of deposition and mineralization of organic material. With the development of novel autonomous in situ instrumentation to overcome large sampling artifacts from decompression, we will i) determine rates of benthic metabolism and the importance of the deep trenches for the marine carbon and nitrogen cycles, ii) explore the unique benthic microbial communities driving these processes, and iii) investigate the proposed great role of virus in regulating microbial performance and carbon cycling in hadal sediments. By comparing trenches from contrasting oceanic settings the project provides a completely novel general analysis of hadal biogeochemistry and the role of deep trenches in the oceans, as well as fundamental new insights into the composition and functioning of microbial communities at extreme pressure.