Skip to main content

IMIS

A new integrated search interface will become available in the next phase of marineinfo.org.
For the time being, please use IMIS to search available data

 

[ report an error in this record ]basket (0): add | show Print this page

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, more
Peer reviewed article  

Available in  Authors 

Keywords
    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]
    Brackish water

Authors  Top 
  • Maltagliati, F., more
  • Camilli, L.

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.

All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors