Caractérisation des impacts des efflorescences algales nuisibles en Manche. Application au cas de la pêcherie de coquilles Saint-Jacques de la Manche Est

Abstract : The French Channel marine ecosystems support a number of important economic activities. These activities are under the threat of Harmful Algal Blooms (HABs). Natural events, HABs release some toxins threatening human health through the consumption of contaminated shellfish. HABs’ management is difficult and more reactive than proactive. This work aims to develop a better understanding of the HABs monitoring and their impacts. To that purpose, a system approach has been implemented to address the HABs issues in an integrated way, to identify and characterize their impacts and analyse the management system (observation, monitoring, decision). The Channel HABs system has been built and structured according to three components: Ecology, Activities and Management. The analysis of the occurrences of HABs has shown that their frequency is increasing, especially Pseudo-nitzschia and Dinophysis, as well as their spatial distribution. A protocol was developed to characterize and study the impacts of HABs over the Eastern Channel scallop fisheries. Its implementation emphasizes that the potential risk to professionals depends on their coping strategies. The responses in terms of an improved monitoring systems through remote sensing (responsiveness) have also shown that monitoring tools have also to suit to the management and stakeholders needs and not solely to the monitoring of HABs occurrences.
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Master Thesis
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https://dumas.ccsd.cnrs.fr/dumas-01992683
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Submitted on : Thursday, January 24, 2019 - 3:24:19 PM
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Sarra Chenouf. Caractérisation des impacts des efflorescences algales nuisibles en Manche. Application au cas de la pêcherie de coquilles Saint-Jacques de la Manche Est. Sciences du Vivant [q-bio]. 2018. ⟨dumas-01992683⟩

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