Data from: Connectivities with shellfish farms and channel rivers are associated with mortality risk in oysters

Date 2019
Temporal extent 2014-04 -2014-10
Author(s) Gangnery AlineORCID1, Normand JulienORCID1, Duval Cyrielle1, Cugier Philippe2, Grangere Karine3, Petton Bruno4, Petton SebastienORCID4, Orvain Francis3, Pernet FabriceORCID5
Contributor(s) Behra Charlotte, Louis Wilfried, Maheux Frank, Mary Charlotte, Simon Benjamin, Courtay Gaelle, Etourneau Claude, Francoise Sylvaine, Guyon Frederic, Jolly Orianne, Leconte Pierre-Alexandre, Lamort Laure, Le Gagneur Eric, Marais Fabienne, Menet-Nedelec FlorenceORCID, Pierre-Duplessix Olivier, Rabiller Emilie, Roger Christophe, Varin Laura
Affiliation(s) 1 : Ifremer, Laboratoire Environnement Ressources de Normandie, Avenue du Général de Gaulle, 14 520 Port en Bessin, France
2 : Ifremer, Laboratoire d’Ecologie Benthique Côtière, Technopole Brest-Iroise, 29 280 Plouzané, France
3 : Université de Caen Basse-Normandie, UMR BOREA, Esplanade de la Paix, BP 5186, 14 032 Caen cedex, France
4 : Ifremer, UMR 6539 LEMAR, 11 presqu’île du vivier, 29 840 Argenton en Landunvez, France
5 : Ifremer, UMR 6539 LEMAR, Technopole Brest-Iroise, 29 280 Plouzané, France
DOI 10.17882/62354
Publisher SEANOE
Keyword(s) Oyster mortality, Ecological modelling, Seawater temperature, Salinity, Chlorophyll a, Hydrodynamic connectivity

Two age-classes of Pacific oysters (Crassostrea gigas), i.e. young and adult, were used as sentinels to monitor mortality in the Baie des Veys (Normandy, France) from mid-April to October 2014. Oysters were deployed at 39 sites spread over a 37 km2 surface area inside and outside of the shellfish farms. Each site was visited 9 times (12-15 May, 13-16 June, 26-30 June, 12-18 July, 27-29 July, 11-14 August, 25-27 August, 9-12 September, 16 October 2014) during spring tides. For young oysters, cumulative mortality obtained in September is provided. For adult oysters, cumulative mortality is provided for 2 periods: from mid-April to mid-July (Period 1) and from mid-July to October (Period 2). A validated 3-D hydrodynamic Model for Applications at Regional Scale (MARS-3D) coupled with a biogeochemical model (ECOMARS-3D) was used to generate high frequency data of seawater temperature, salinity, chlorophyll a concentration (derived from phytoplankton) and hydrodynamic connectivity to oyster farms and to the mouths of the channel rivers at the 39 sites. For seawater temperature, salinity and chlorophyll a, the minimum, maximum and mean values of hourly data are provided for the whole study period as well as the mean of daily mean or median of daily median for Periods 1, 2 (used for adult oysters) and the period from mid-April to September (used for young oysters). Hydrodynamic connectivities to river channels (Carentan and Isigny) and shellfish areas (Grandcamp and Utah Beach) were estimated in February, May and August 2014. This database is part of the ANR GIGASSAT project No. ANR-12-AGRO-0001.

Licence CC-BY-NC
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66636.csv 539 KB CSV Processed data Open access
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Gangnery Aline, Normand Julien, Duval Cyrielle, Cugier Philippe, Grangere Karine, Petton Bruno, Petton Sebastien, Orvain Francis, Pernet Fabrice (2019). Data from: Connectivities with shellfish farms and channel rivers are associated with mortality risk in oysters. SEANOE.