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Population structure of oysters (Ostrea edulis) caught in the annual population surveys. Data are presented as the percentage in each shell height size category of pooled data for all sites in surveys carried out 2004–2018. Black bars: small oysters below minimal legal size; Light grey bars: targeted oysters above minimal legal size and below preferred marked-size; Dark grey bars: large oysters above preferred marked size (see text for more details).
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