Connectivity of Variola albimarginata Between Marine Protected Areas and Fishing Grounds in Fisheries Management Area 714: A Molecular Approach

This study investigated the connectivity of Variola albimarginata populations between marine protected areas (MPAs) and fishing grounds within fisheries management area 714 (FMA 714) using molecular approaches. DNA barcoding with the cytochrome c oxidase subunit I (coi) gene marker was employed to assess genetic diversity and connectivity. A total of 18 samples were analyzed, showing high genetic diversity, albeit with low genetic variation. The haplotype network analysis revealed the presence of seven distinct haplotypes, with one dominant haplotype observed in 11 samples from four different populations. The remaining six haplotypes were found in single individuals, suggesting a more limited distribution of these genetic variants. The findings indicate significant gene flow between the MPAs and fishing grounds, supporting the hypothesis of population connectivity across these areas. Despite the high haplotype diversity, the low nucleotide variation observed suggests that the populations may have undergone recent population bottlenecks followed by rapid growth. Overall, the study highlights the importance of genetic monitoring to understand the connectivity of fish populations in managing marine resources effectively, particularly in areas exposed to both conservation efforts and fishing pressures.