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Estimation du polymorphisme enzymatique d'une population de Penaeus jap nicus maintenue en élevage depuis quatre générations ArchiMer
Laubier, A; Pasteur, N; Moriyasu, M.
The polymorphism of 37 enzyme-encoding genes was investigated in a Penaeus japonicus population born the same night from a stock maintained artificially four generations. Five loci were found to be polymorphie (Lap-4, Es-3, Es-6, Es-8 and Mpi-2), and genotype frequencies at four of these loci indicate: a) that the shrimps studied come from the same two parents and b) that Mpi-2 and Es-3 genes are autosomal. The rate of polymorphism observed in this Penaeus japonicus population is similar to that described in natural populations of other Peneidae species, despite the probable occurrence of inbreeding.
Tipo: Text Palavras-chave: Penaeus japonicus; Aquaculture; Génétique; Allozym; Penaeus japonicus; Aquaculture; Genetics; Allozymes.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/00113/22443/20130.pdf
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L'exploitation mondiale des crustaces: Bilan et perspectives ArchiMer
Laubier, A; Laubier, Lucien.
Since nearly twenty years, world exploitation of crustaceans increases from 1,263,000 tons in 1968 to 3,419,000 tons in 1985, overcoming the predictions of 1970 by more than one million tons. Penaeid prawns fisheries experienced a very fast development. The krill resource proved to be practically commercially unworkable. By now, the major crustaceans stocks appear fully exploited. During the same period, penaeid aquaculture experienced a fast growth, which should continue in the near future.
Tipo: Text Palavras-chave: Statistics; Shrimp culture; Crustacean fisheries; Commercial species.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/1987/acte-1407.pdf
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Morphogenese sexuelle et regulation hormonale de l'activite genitale chez la crevette Penaeus japonicus en elevage ArchiMer
Laubier, A; Chim, Liet; Payen, G.
A study of the sexual physiology of penaeid prawns essentially based upon Penaeus japonicus is performed in both descriptive and experimental ways, using the controlled rearings conducted at the Centre Oceanologique de Bretagne (CNEXO-COB), Brest. Sexual morphogenesis is described. This preliminary study enables definition of simple criteria for determination of the stage of genital development of the prawns during their growth. The neuroendocrine control of the genital system development is studied, using eyestalks ablations and male eyestalks extracts injection in prawns belonging to the same sex. A biochemical criterion as a test of the effect of eyestalks extract injections on the genital system development is discussed. The evolution of the specific...
Tipo: Text Palavras-chave: Penaeus japonicus; Malacostraca; Controlled conditions; Neurosecretion; Cytochemistry; Ultrastructure; Sexual reproduction; Sexual maturity; Sexual dimorphism; Endocrinology; Eyestalk extirpation; Gametogenesis; Sex determination; Morphogenesis; Contrôle neuroendocrine de la reproduction; Morphogénèse sexuelle; Physiologie sexuelle; Élevage contrôlé; Penaeus japonicus.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/1983/acte-1188.pdf
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