Data from: A 26-year time series of mortality and growth of the Pacific oyster C. gigas recorded along French coasts

• Main Authors: Mazaleyrat, Anna, Normand, Julien, Dubroca, Laurent, Fleury, Elodie
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2022
• Subjects: mollusk; time-series; oyster; growth; mortality; Crassostrea gigas; Pacific oyster
• Online Access: https://doi.org/10.5281/zenodo.5744977

Contents: database of oyster growth ( i.e., the changes in mass over time) and mortality along French coasts since 1993. To build this database, we took advantage of the Pacific oyster production monitoring network coordinated by IFREMER (the French Research Institute for the Exploitation of the Sea). This network monitors the growth and mortality of spat (less than one-year-old individuals) and half-grown (between one and two-year-old individuals) Crassostrea gigas oysters since 1993. As the number of sites monitored over the years varied, we focused on 13 sites that were almost continuously monitored during this period. For these locations, we modeled growth and cumulative mortality for spat and half-grown oysters as a function of time, to cope with changes in data acquisition frequency, and produced standardized growth and cumulative mortality indicators to improve data usability. Code to reproduce these analyses are archived here, as well as figures included in the companion data paper: "A 26-year time series of mortality and growth of the Pacific oyster C. gigas recorded along French coasts". Sampling protocol: in the oyster production monitoring network, oysters were mainly reared in plastic meshed bags fixed on iron tables, mimicking the oyster farmers practices. After their deployment at the beginning of the campaign (seeding dates from February to April depending on the year), growth and mortality were longitudinally monitored yearly. At each sampling date, local operators carefully emptied each bag in separate baskets, counted the dead individuals and alive ones, and removed the dead individuals. Then local operators weighed all alive individuals in each basket (mass taken at the bag level, protocol mainly used between 1993 and 1998 and since 2004) and/or collected 30 individuals to individually weigh them in the laboratory (mass taken at the individual level, protocol used between 1995 and 2010 for spat and since 1996 for half-grown oysters). Data: AllDataresco. csv is a csv file containing the raw ...