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Registros recuperados: 6
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Biologie et genetique des populations de crustaces. Strategies mises en jeu, essai de synthese ArchiMer
Gaudy, R; Kerambrun, P.
Population genetics, which analyses the genetic structure of natural populations, has an an objective a better understanding of the mechanisms of support of the polymorphism and of the relations between this one and physical, chemical and trophic conditions of the environment. In this double objective, population genetics meet the biology of populations whose demographic aspects can be disturbed by a decrease of polymorphism (inbreeding) or by changes in ecological conditions.
Tipo: Text Palavras-chave: Crustacea; Biopolymorphism; Animal populations; Ecophysiology; Genetics.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/1987/acte-1394.pdf
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Différenciation génétique de quelques populations Tunisiennes d'Artemia leach, 1819 (crustacé, branchiopode) OceanDocs
Ghlala., A.; Charfi-Cheikhrouha., F..
L’analyse du polymorphisme isoenzymatique de 5 populations d’Artemia de Tunisie a été entreprise afin d’évaluer les ressources génétiques de cette espèce et d’estimer la variabilité génétique intra et interpopulationnelle. Cette analyse a été effectuée sur la base de 5 systèmes enzymatiques et 11 loci dont 7 sont polymorphes : PEP3, PEP4, IDH1, IDH2, MDH1, MDH2 et APH. Parmi ces loci, l’IDH2 et la MDH1 peuvent être considérés comme des loci diagnostiques. Les paramètres de diversité génétique estimés pour l’hétérozygotie observée, le taux de polymorphisme et le nombre moyen d’allèles par locus sont de 0.051 à 0.364, de 36.4% à 45.5% et de 1.3 à 1.7 respectivement. Les valeurs des distances génétiques de Nei (1978), calculées à partir des fréquences...
Tipo: Journal Contribution Palavras-chave: Alleles; Biopolymorphism; Biopolymorphism; Population genetics; Statistical tables; Variability; Alleles; Population genetics; Http://aims.fao.org/aos/agrovoc/c_8724; Http://aims.fao.org/aos/agrovoc/c_34326.
Ano: 2008 URL: http://hdl.handle.net/1834/4233
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Enzymatic polymorphism study as help for constitution of initial broodstock for a new cultivated finfish species. ArchiMer
Renno, J; Luquet, P.
Leporinus friderici is a South American promising species for fish culture. In French Guiana the "morphological species", L. friderici, L. granti, L. lebaili and L. affinis steyermarki are found. Their identification is sometimes difficult on usual criterion. To constitute an initial broodstock of L. friderici from local wild populations, the genetic structure of these species was studied. Fifteen enzyme systems, representing twenty loci, were screened.
Tipo: Text Palavras-chave: French Guiana; Leporinus; Leporinus granti; Leporinus friderici; Anostomidae; Pisces; Embryos; Mortality; Genetics; Freshwater fish; Rearing; Breeding; Biopolymorphism; Brood stocks; Enzymatic activity.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/1989/acte-1441.pdf
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Mesure de la retention de Skeletonema costatum par Ruditapes philippinarum (Mollusque, Bivalve) en fonction de la longueur des colonies algales: Principes methodologiques ArchiMer
Sauriau, P; Baud, Jean-pierre.
Based on Coulter Counter data, a new method is proposed to study the influence of the polymorphous variability in size as well as in shape of the diatom species Skeletonema costatum on the physiological performances of the Manila clam Ruditapes philippinarum . Three conditions are required in order to convert volumetric data determined with the Coulter Counter into metric data, i.e. (1) stability of the pervalvar diameter of the diatom chains, (2) statistical independence between length and pervalvar diameter of the diatom chains, and (3) negligible level of coincident passages through the aperture orifice. Under these three conditions, the mean length (l) of a S. costatum chain can be related to the mean pervalvar diameter (d) of diatom chains and to the...
Tipo: Text Palavras-chave: Bivalvia; Skeletonema costatum; Bacillariophyceae; Algae; Physiology; Biopolymorphism; Counters; Size; Size distribution; Feeding; Nutrition.
Ano: 1991 URL: http://archimer.ifremer.fr/doc/1991/acte-1670.pdf
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Polymorphisme intraspécifique chez le syngnathe aiguille, <Syngnathus acus> (osteichthyes, syngnathidae) des eaux Tunisennes (Méditérranée centrale) OceanDocs
Ben Amor, M. M.; Ben Salem, M.; Capapé, C..
De juin 2002 à juin 2005, 267 syngnathes aiguilles, <Syngnathus acus> Linnaeus, 1758, ont été récoltés dans les eaux tunisiennes: 204 dans Bahiret El Biban (Tunisie méridionale), 24 dans la lagune Sud de Tunis et 39 devant La Goulette (Tunisie septentrionale). Trois types d'études ont été effectués à partir de l’ensemble des variables biométriques: la première repose sur l'analyse de la variance et de la moyenne à l'aide du test "F" de Ficher et du test "t" de Student; la deuxième est fondée sur l’analyse de la multivariance (ANOVA); et la troisième est fondée sur des analyses multidimensionnelles. La première et la deuxième études ont montré des différences significatives dans les variances et les moyennes pour la plupart des caractères examinés,...
Tipo: Journal Contribution Palavras-chave: Biometrics; Biopolymorphism; Population genetics; Statistical analysis.
Ano: 2008 URL: http://hdl.handle.net/1834/4234
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Variabilite genetique de quelques especes de crevettes Peneides d'interet aquacole ArchiMer
Ko, G; Pasteur, N; Bonhomme, Francois; Liao, D.
Thirteen populations belonging to seven species of Penaeid prawns (Crustacea, Decapoda) were analyzed at 29 protein loci. The authors show that both inter and intrapopulational genetic diversity are very low. These results are discussed in view of their use as guidance for aquaculture programs.
Tipo: Text Palavras-chave: Penaeus kerathurus; Penaeus orientalis; Penaeus indicus; Penaeus monodon; Penaeus stylirostris; Penaeus japonicus; Penaeidae; Malacostraca; Prawn culture; Aquaculture development; Sexual reproduction; Biopolymorphism; Population genetics; Polymorphisme enzymatique; Variabilité génétique; Crevettes Pénaeides; Crustacés.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/1983/acte-1186.pdf
Registros recuperados: 6
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