Mandai, Silvia Sayuri and Buranelli, Raquel Correa and Schubart, Christoph D. and Mantelatto, Fernando L. (2018) Phylogenetic and phylogeographic inferences based on two DNA markers reveal geographic structure of the orangeclaw hermit crab Calcinus tibicen (Anomura: Diogenidae) in the western Atlantic. MARINE BIOLOGY RESEARCH, 14 (6). pp. 565-580. ISSN 1745-1000, 1745-1019
Full text not available from this repository. (Request a copy)Abstract
The hermit crab Calcinus tibicen has an extensive distribution along the coasts of the western Atlantic Ocean, from the USA to southern Brazil. The present study aimed to test the hypothesis of the presence of phylogeographic structure of C. tibicen throughout its distribution, evaluating the genetic and morphological variabilities of the species. The molecular data, genetic diversity and demographic history were inferred from 16 different localities for the mitochondrial genes cytochrome oxidase subunit I (COI) (75 specimens) and 16S rRNA (20). The morphological information was based on 99 individuals from the same 16 localities. Results were obtained by the construction of haplotype networks and a phylogenetic tree, an Analysis of Molecular Variance (AMOVA), Tajima's D and Fu's Fs tests, pairwise mismatch distributions under the sudden expansion model, and by estimating divergence times. The haplotype networks show the existence of two genetically well-defined groups that do not share haplotypes. The phylogenetic tree and the matrix of genetic distances suggest lack of gene between North and South Atlantic groups, also corroborated by AMOVA for the COI gene. The genetic distance can be attributed to at least two ecological factors: the existence of a physiological barrier caused by the Amazon River freshwater plume, and the effect of the bifurcation of the westerly flowing South Atlantic oceanic currents creating a gap along the Brazilian coastline. Demographic history analyses suggest that C. tibicen experienced population expansion, probably after the Amazon River changed its direction. Despite the molecular evidence for the existence of a phylogeographic structure, no morphological pattern for each genetic group was observed. Therefore, based on the described molecular differences and the ecological and historical factors suggested, the question arises whether a cryptic species should be recognized for some of the populations of C. tibicen.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LOBSTER PANULIRUS-ARGUS; HUMAN MITOCHONDRIAL-DNA; GENETIC DIFFERENTIATION; POPULATION-GENETICS; SOUTH-AMERICA; DECAPODA DIOGENIDAE; MOLECULAR PHYLOGENY; MAXIMUM-LIKELIHOOD; OCEAN CURRENTS; VITTATUS BOSC; Torsten Struck; Genetic heterogeneity; mitochondrial genes; phylogeography; population genetics; 16S; COI |
| Subjects: | 500 Science > 570 Life sciences 500 Science > 590 Zoological sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Zoologie Biology, Preclinical Medicine > Institut für Zoologie > Zoologie/Evolutionsbiologie (Prof. Dr. Jürgen Heinze) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 20 Mar 2020 09:36 |
| Last Modified: | 20 Mar 2020 09:36 |
| URI: | https://pred.uni-regensburg.de/id/eprint/15346 |
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