Silva, Ines C. and Mesquita, Natacha and Schubart, Christoph D. and Alves, Maria Judite and Paula, Jose (2009) Genetic patchiness of the shore crab Pachygrapsus marmoratus along the Portuguese coast. JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY, 378 (1-2). pp. 50-57. ISSN 0022-0981,
Full text not available from this repository. (Request a copy)Abstract
The population genetic structure of the shore crab Pachygrapsus marmoratus was studied along the Portuguese coast based on six variable microsatellite loci. Genetic differentiation among populations according to a geographic gradient was not detected. This lack of genetic structure reflects the continuous distribution of the species along the Portuguese coast and suggests that gene flow occurs within the studied distribution range. Gene flow is probably maintained by the planktonic larvae of P. marmoratus that can last up to 31 days in the plankton. Tests for population differentiation demonstrated that the Praia das Avencas population is genetically more separated from all other populations, and Bayesian methodologies tend to form 4 groups that clustered together populations that are several hundred kilometres apart. This grouping pattern could be due to coastal hydrological events that are apparently influencing larval flux. Other hypotheses to explain the significant genetic heterogeneity among populations on a local scale and the absence of geographic variation are pre- and post-settlement natural selection events. Results suggest that the forces causing genetic differentiation may be acting on a local scale and that the larval pool is possibly not always mixed homogeneously. (C) 2009 Elsevier B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | POPULATION-STRUCTURE; LARVAL DISPERSAL; ALLELE FREQUENCY; PELAGIC LARVAE; PATTERNS; FLOW; RECRUITMENT; ATLANTIC; MICROSATELLITES; DIFFERENTIATION; Genetic patchiness; Geographic gradient; Microsatellites; Pachygrapsus marmoratus; Population structure |
| Subjects: | 500 Science > 590 Zoological sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Zoologie > Zoologie/Evolutionsbiologie (Prof. Dr. Jürgen Heinze) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 07 Sep 2020 05:34 |
| Last Modified: | 07 Sep 2020 05:34 |
| URI: | https://pred.uni-regensburg.de/id/eprint/28386 |
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