Data/hora: 05/06/2024 01:24:14

Provedor de dados: | 5
País: | France
Título: | The shellfish industry in France
Autores: | Bonnet, Marc; Troadec, Jean-paul.
Data: | 1985-03-04
Ano: | 1985
Palavras-chave: | Research priorities; Contraints; Risks; France; Economic importance; Shellfish industry; Recherches prioritaires; Contrainte; Risques; France; Economie; Conchyliculture.
Resumo: | Bivalve farming is in France a major economical activity, which development was initiated in the mid of last century. It occupies nowadays 24 000 ha of seabottom, leased from the French State, and production figures are above 100 000 tonnes for cupped oyster and 40 000 tonnes for mussel ; these made a gross value of 1 300 millions francs in 1983. Moreover, it shows potential for promising development, by expanding to new areas, especialy in deep sea, or by introducing new species, such as the short neck clam, which production has just reached significant level (300 T in 1984). Long age and success of this cultivation activity come from the important advantages related to the biology and ecology of bivalves: food naturaly available, and of no use by another way, high density in culture, possibility of natural spat collection, sedentary nature enabling confinement of stocks and setting up of farms, resource allocation by means of leases. But these strengthes are offset by specific weaknesses, which may lead to crisis situations, with serious economical and social consequences: - specifie vulnerability of bivalve molluscs, due to their filtering and sedentary features, and to the degradation of environment (pollution, red tides, ... ) - risks of heavy mortality of stocks due to epizooties, enhanced by high density of stocks and Jifficulty of any control in an open water environment, - competition for limited natural carrying capacity, resulting in overstocking, and then much slower growth and higher sensitivity to epizootics, - increasing human activity of various types (urbanization, industries, agriculture, tourism) which may reduce the carrying capacity of coastal areas, highly demanded. Planning has a high priority in France, and research is supporting it, noticeably for conceiving models of bivalve production, making possible biomass assesment in relation with productivity of culture sites. Researches are intensified in pathology and genetics to decrease the risks and consequences of epizootics and improve performances of cultured species.
Tipo: | Text
Idioma: | Inglês
Identificador: | http://archimer.ifremer.fr/doc/1985/acte-6223.PDF
Editor: | Actes du Séminaire Shellfish Culture Development and Management, La Rochelle, 4-9 mars 1985, pp 59-82
Relação: | http://archimer.ifremer.fr/doc/00000/6223/
Formato: | application/pdf