title: Temporal variation of the population structure and genetic diversity of Farfantepenaeus notialis assessed by allozyme loci.
abstract: Population genetic studies carried out on penaeid shrimps have disclosed different patterns of population subdivision, revealing new aspects of shrimp biology as well as the effects of historical contingency molding those patterns. However, the stability of observed allele frequencies over time still remains untested. The objective of this article is to show the analysis of the temporal variation of allozymes in a shrimp species inhabiting Cuba which proves that the genetic structure of this species could significantly change in time. The study involves four populations of Farfantepenaeus notialis sampled in a period of 8 years. The significant statistics obtained from partitions observed in 1995 were not detected in 2003 (as suggested by AMOVA and F(ST)), whereas temporal genetic differentiation and heterozygosity became highly significant. The results strongly suggest that the effect of migrations could be the cause for the loss of F. notialis genetic structure in 2003. It is therefore imperative to call attention on the vulnerability of these populations when facing unstable environmental and habitat conditions.
authors.affiliation: Centro de Investigaciones Marinas, Universidad de La Habana, Calle 16, No. 114 entre 1ra y 3ra, Miramar, Playa, Ciudad Habana 11300, Cuba.
authors.forename: Aymée
authors.initials: A
authors.lastname: Robainas Barcia
authors.forename: Georgina
authors.initials: G
authors.lastname: Espinosa López
authors.forename: Damir
authors.initials: D
authors.lastname: Hernández
authors.forename: Erik
authors.initials: E
authors.lastname: García-Machado
mesh_terms: D000483:Alleles; D000818:Animals; D003247:Conservation of Natural Resources; D003462:Cuba; D004247:DNA / Q000737:chemistry / Q000235:genetics; D004592:Electrophoresis, Starch Gel / Q000662:veterinary; D004798:Enzymes / Q000235:genetics; D005260:Female; D014644:Genetic Variation; D005828:Genetics, Population; D008297:Male; D033561:Penaeidae / Q000201:enzymology* / Q000235:genetics*; D010802:Phylogeny; D011157:Population Dynamics
chemical_list: D004798:Enzymes; D004247:DNA