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<p>The lane snapper (<i>Lutjanus synagris</i>) is a valuable fishery resource vulnerable to various threats in the Mexican Atlantic, including coral reef degradation, damage to seagrass beds, massive influxes of sargassum, decline of other commercially important species, as well as its slow growth rate and late sexual maturity. Various studies have reported genetic differences and low genetic diversity in lane snapper populations; however, no information is currently available for populations along the Mexican Atlantic coast. Hence, this study aimed to assess the genetic connectivity levels among <i>L. synagris</i> populations across four sites spanning 1400&#xa0;km of coastline in the Mexican Atlantic. Results showed that allele frequencies are statistically different across populations, yet no relationship was found between genetic flow and geographical distances. Additionally, low genetic diversity was observed in all populations compared to Atlantic-wide studies. The Garza-Williamson index suggested that the studied populations experienced a size reduction. This study highlights the need to regulate the fishing of this species.</p>

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Low genetic diversity and limited gene flow between populations of lane snapper (Lutjanus synagris) from the Mexican Caribbean and Gulf of Mexico

  • 期刊论文

  • 发表日期：

    2025年1月7日

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  • Manuel Montejo-Sosa,
  • Carmen Amelia Villegas-Sánchez,
  • Jaime Martínez-Castillo,
  • Matilde Margarita Ortiz-García,
  • José Héctor Lara-Arenas,
  • Rigoberto Rosas-Luis

摘要

The lane snapper (Lutjanus synagris) is a valuable fishery resource vulnerable to various threats in the Mexican Atlantic, including coral reef degradation, damage to seagrass beds, massive influxes of sargassum, decline of other commercially important species, as well as its slow growth rate and late sexual maturity. Various studies have reported genetic differences and low genetic diversity in lane snapper populations; however, no information is currently available for populations along the Mexican Atlantic coast. Hence, this study aimed to assess the genetic connectivity levels among L. synagris populations across four sites spanning 1400 km of coastline in the Mexican Atlantic. Results showed that allele frequencies are statistically different across populations, yet no relationship was found between genetic flow and geographical distances. Additionally, low genetic diversity was observed in all populations compared to Atlantic-wide studies. The Garza-Williamson index suggested that the studied populations experienced a size reduction. This study highlights the need to regulate the fishing of this species.