Population structure of red porgy, <Emphasis Type="Italic">Pagrus pagrus</Emphasis>, in the Atlantic Ocean |
| |
Authors: | A O Ball M G Beal R W Chapman G R Sedberry |
| |
Institution: | (1) South Carolina Department of Natural Resources, 331 Fort Johnson Road, Charleston, SC 29412, USA |
| |
Abstract: | The red porgy, Pagrus pagrus (L.), is a protogynous sparid associated with reefs and hard bottom habitat throughout the warm-temperate Atlantic Ocean.
In this study, the degree of geographic population differentiation in Atlantic populations was examined with microsatellite
and mitochondrial DNA markers (mtDNA). Six microsatellite loci were amplified and scored in 690 individuals from the eastern
North Atlantic (Crete, Madeira, and Azores), western North Atlantic (North Carolina to Florida, and the eastern Gulf of Mexico),
and Brazil. At two loci, fixed allelic differences were found among the three major geographic areas, while frequency differences
were observed at three other loci. The DNA of 371 individuals was amplified at the mtDNA control region, and 526 bp were sequenced.
Tamura–Nei’s D was used as a measure of nucleotide diversity and divergence: diversity averaged 0.011 within samples, while the corrected
divergence averaged 0 between samples within the same area and 0.061 between samples from different areas. Transversion haplotype
minimum spanning networks, nucleotide divergence, and F
ST values all show that the western Atlantic samples were more closely related to each other than any was to samples from the
eastern North Atlantic. Within the western North Atlantic, no significant population differentiation was observed, and within
the eastern North Atlantic, only the Azores sample showed detectable differences from Crete and Madeira. These data indicate
general homogeneity within large areas, and deep divisions between these areas.
Electronic supplementary material Supplementary material is available in the online version of this article at and is accessible for authorized users. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|