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| Pete, Romain; Guyondet, Thomas; Bec, Beatrice; Derolez, Valerie; Cesmat, Ludovic; Lagarde, Franck; Pouvreau, Stephane; Fiandrino, Annie; Richard, Marion. |
| The decrease of microbial and nutrient inputs from the watershed has long dominated lagoon ecosystem management objectives. Phytoplankton biomass and abundance have drastically decreased for more than a decade and Zostera meadow have gradually recovered, expressing lagoon ecosystem restoration such as Thau lagoon. Do the progressive achievement of the good ecological status of the Thau lagoon possibly threatens the shellfish industry in terms of production and oyster quality, by reducing the carrying capacity? To provide answers about the right balance to be achieved between conservation and exploitation, a new numerical tool was developed to help in decision-making. We hereby propose to incorporate a Dynamic Energy Budget type shellfish production model... |
| Tipo: Text |
Palavras-chave: Shellfish farming; Carrying capacity; Stakeholder implication; Nitrogen and phosphorus inputs; Water frame directive; Ecological indicators; Phytoplankton depletion; Coupled biogeochemical-deb model. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00622/73395/75312.pdf |
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| Pernet, Fabrice; Lagarde, Franck; Cesmat, Ludovic; Jeannée, Nicolas; Barret, Jean; Le Gall, Patrik; Quere, Claudie; Fiandrino, Annie; Miguet, Marine; Boulet, Hélène; Keck, Nicolas; Roque D'Orbcastel, Emmanuelle. |
| Cette étude avait pour objectif principal de déterminer les facteurs explicatifs de la dynamique spatio-temporelle des surmortalités d’huîtres creuses dans la lagune de Thau. Les facteurs étudiés étaient : la pathologie (détection d’ADN appartenant à l’Ostreid herpesvirus 1 OsHV-1 et au groupe bactérien Vibrio splendidus), l’état énergétique des huîtres (triglycérides, sucres totaux et acides gras comme marqueurs trophiques), les pratiques d’élevage et l’hydrodynamique. Afin de répondre à ces objectifs, nous avons suivi la mortalité d’un lot d’huîtres sentinelles, âgé de moins d’un an, maintenu indemne de mortalité, dans lequel on ne détectait pas d’ADN appartenant à OsHV-1. Le lot a été déployé mi-mars 2011 sur 106 stations dans la lagune de Thau, où les... |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00092/20355/18015.pdf |
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| Derolez, Valerie; Soudant, Dominique; Fiandrino, Annie; Cesmat, Ludovic; Serais, Ophelie. |
| Aims The Thau lagoon shellfish are regularly impacted by microbial pollution of faecal origin, which cause European health standards to be exceeded and closure of the shellfish harvest. The aims of this study were to investigate the impact of weather and hydrological conditions on Escherichia coli (E. coli) accumulation factor (AF) between water and oysters and to evaluate the relevance of the use of this ratio for the purpose of sanitary risk assessment. Methods and results Water and oysters (Crassostrea gigas) were sampled simultaneously in situ during 18 months in periods of dry weather and after rainfall events. Shellfish sanitary thresholds were exceeded in both periods. The E. coli AFs measured after rainfall (median = 6) were lower than in dry... |
| Tipo: Text |
Palavras-chave: E; Coli; Environmental health; Food safety; Shellfish; Water quality. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00119/23049/22503.pdf |
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