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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 [24339]

A preliminary investigation of allozyme genetic variation and population geographical structure in Aphanius fasciatus from Italian brackish-water habitats Maltagliati, F. (1998). A preliminary investigation of allozyme genetic variation and population geographical structure in Aphanius fasciatus from Italian brackish-water habitats. J. Fish Biol. 52: 1130-1140. https://dx.doi.org/10.1006/jfbi.1998.0656 In: Journal of Fish Biology. Fisheries Society of the British Isles: London,New York,. ISSN 0022-1112; e-ISSN 1095-8649, meer

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Beschikbaar in	Auteur
VLIZ: Open access 24339 [ download pdf ]

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Trefwoorden

Biological development > Differentiation Characteristics > Diversity Conservation Differentiation Disciplines > Biology > Genetics > Population genetics > Gene flow Distance Enzymes > Allozymes Fauna > Aquatic organisms > Aquatic animals > Fish Genetic diversity Genetic parameters > Genetic distance Marine Population characteristics > Population structure Aphanius fasciatus (Valenciennes, 1821) [WoRMS]; Cyprinodontidae Wagner, 1828 [WoRMS]; Cyprinodontiformes [WoRMS]; Teleostei [WoRMS] MED, Italy [Marine Regions] Brak water

Author keywords

aphanius fasciatus; Genetic variations; Brackish-water habitats; Fresh-water; Isolation-by-distance; Pupfish

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Auteur		Top
Maltagliati, F., meer

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Abstract

A total of 150 individuals from Aphanius fasciatus from coastal brackish-water habitats was analysed by allozyme electrophoresis to collect data on its genetic variation. From 22 enzymes, 43 putative enzyme-coding loci were resolved, 12 of which were polymorphic at P-0.99 level. Only one of the 31 probability tests showed a significant departure from the Hardy-Weinberg equilibrium. Aphanius fasciatus showed low levels of genetic polymorphism, with expected heterozygosity values ranging from 0.027 (S.E.=0.013) to 0.064 (S.E.=0.023). Nei's genetic distances between populations ranged from 0.002 to 0.042. Weir & Cockerham F-statistics showed high levels of genetic heterogeneity among populations (jackknifed theta=0.302, S.E.=0.045) and estimates of N-m were <1, indicating restricted gene flow. Significant positive correlation between genetic distance and geographical distance matrices, detected by Mantel's test (g=1.941; P<0.001), is consistent with the prediction that the species is genetically structured by isolation-by-distance.

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