Data/hora: 02/06/2024 10:37:33

Provedor de dados: | 5
País: | France
Título: | Mortalité de l'huître Crassostrea gigas dans le bassin de Marennes-Oléron: étude de la variabilité spatiale de son environnement et de sa biologie par un système d'informations géographiques (SIG)
Autores: | Soletchnik, Patrick; Le Moine, Olivier; Faury, Nicole; Razet, Daniel; Geairon, Philippe; Goulletquer, Philippe.
Data: | 1999-03
Ano: | 1999
Palavras-chave: | Atlantic Ocean; Crassostrea gigas; Mortality; Growth rates; Océan Atlantique; Crassostrea gigas; Mortalité; Croissance.
Resumo: | The summer mortality patterns was studied in 1996 on the Ronce-les-Bains oyster bank (175 ha), located on the southern part of the Bay Marennes-Oleron (Atlantic coastline). Studies on growth, sexual maturation, survival rates and environmental variables were compared at fifteen experimental sites (on- and off-bottom culture). After 7 months, cumulative mortality reached 8-19 and 23-33% for off-bottom and on-bottom culture, respectively which is significantly higher for the latter case. A seasonal mortality trend was noted, with a significant increase related to air temperature greater than 20 degrees C and with a significant pre-spawning glycogen catabolism. Based on soft tissue flesh growth results from both types of culture, several empirical models were developed to assess overall yield from a spatial point of view. A N-NW positive trend was noted for the soft tissue flesh, suggesting a decrease in food availability towards the southern part of the bay. Yields (total weight) ranged from 85 to 2% for off-bottom cultures with 25 and 50% emersion times, respectively. For on-bottom culture, several sites have shown a negative yield down to -10% in the southern oyster bank sites. The highest yields were noted in areas located on the E-NE part of the Ronce oyster bank.
Tipo: | Text
Idioma: | Francês

Identificador:

http://archimer.ifremer.fr/doc/1999/publication-862.pdf

DOI:10.1016/S0990-7440(99)80022-9

Editor: | Elsevier
Relação: | http://archimer.ifremer.fr/doc/00000/862/
Formato: | application/pdf
Fonte: | Aquatic Living Resources (0990-7440) (Elsevier), 1999-03 , Vol. 12 , N. 2 , P. 131-143
Fonte: | 1999 Published by Elsevier SAS