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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

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one publication added to basket [24349]

Temporal genetic variation in a population of Aphanius fasciatus (Cyprinodontidae) from a brackish-water habitat at Elba Island (Italy) Maltagliati, F.; Camilli, L. (2000). Temporal genetic variation in a population of Aphanius fasciatus (Cyprinodontidae) from a brackish-water habitat at Elba Island (Italy). Environ. Biol. Fish. 57(1): 107-112. https://dx.doi.org/10.1023/A:1007604831242 In: Environmental Biology of Fishes. Junk: The Hague. ISSN 0378-1909; e-ISSN 1573-5133, meer

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Beschikbaar in	Auteurs
VLIZ: Non-open access 24349 [ aanvragen ]

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Trefwoorden

Bioselection > Genetic drift Conservation Enzymes > Allozymes Fauna > Aquatic organisms > Aquatic animals > Fish Fishes > Osteichthyes > Salmoniformes > Salmonidae > Salmon > Salmo > Diadromous fishes > Atlantic salmon Generations Genes > Alleles > Multiple alleles Genetic parameters > Genetic distance River Selection Selection Teleostei [WoRMS] Greece [Marine Regions]; Mediterranean [Marine Regions] Brak water

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Auteurs		Top
Maltagliati, F., meer Camilli, L.

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Abstract

Allozyme electrophoresis was used to assess temporal genetic variation in three successive generations of the Mediterranean killifish, Aphanius fasciatus. Samplings were carried out in 1995, 1996 and 1997 in a brackish-water habitat at Elba Island, Italy and a total of 212 specimens were collected. The five loci for which polymorphism has been detected in a previous study were assayed. Mean expected heterozygosity values [H=0.397 (SE 0.077), H=0.336 (SE 0.092) and H=0.313 (SE 0.092) in 1995, 1996 and 1997, respectively] were not significantly different by ANOVA test. Deviations from Hardy-Weinberg equilibrium were minimal, with only one out of the 15 probability tests showing a significant departure from the equilibrium; whereas genotypic linkage disequilibrium was not detected. Values of Nei's genetic distance were lower than 0.04. Temporal genetic variation in the A. fasciatus population at Elba Island was observed, with F-statistics indicating significant genetic divergence among samples (theta=0.035, SE 0.027, p < 0.001). Genetic drift acting on two loci (GPD-1* and LDH-3*) is presumably the main force determining the temporal genetic heterogeneity observed; however, the occurrence of selection on individual loci and/or sampling error cannot be excluded. The observed allelic variation among generations in a single population of A. fasciatus is much less than levels observed among geographically discrete samples in previous studies.

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