Genetic diversity of the blue land crab Cardisoma guanhumi (Latreille 1825) in the Alvarado Lagoon System in Veracruz, gulf coast of Mexico
| Autor: | José Francisco Rendón-Hernández, Guadalupe Fabiola Arcos-Ortega, Ricardo González-Trujillo, María de Lourdes Jiménez-Badillo, Carlos I. Pérez-Rostro, Gabriela Galindo-Cortes |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Alvarado Lagoon System
Genetic diversity education.field_of_study biology Ecology Population Cardisoma guanhumi genetic diversity Aquatic Science Oceanography biology.organism_classification Gene flow COI Overexploitation Habitat destruction Effective population size land crab Genetic structure education Mexico D-loop region mtDNA |
| Zdroj: | Latin american journal of aquatic research v.49 n.1 2021 SciELO Chile CONICYT Chile instacron:CONICYT |
| Popis: | In the Alvarado Lagoon System (ALS) in south-central Veracruz on Mexico's gulf coast, the blue land crab, Cardisoma guanhumi, a semi-terrestrial crustacean species, represents an important fishery resource, but one that is subject to overexploitation and habitat destruction. Identifying genetic diversity and the genetic unit are required to establish efficient conservation strategies. The present study's goal was to assess the genetic structure and degree of genetic diversity of C. guanhumi populations along the ALS. A fragment of the D-loop region of the mtDNA (750 bp) and a partial sequence of the COI gene (580 pb) was sequenced for 120 specimens collected at four sites in the ALS. Genetic diversity indices were estimated for each marker. The study sites' gene flow was estimated, as was the effective population size and the mutational rate for each locality. A haplotype network was built to estimate the gene genealogies of the populations. A Tajima's neutrality test, Fu tests, and mismatch analysis were performed to detect demographic expansion. Results show that this C. guanhumi population has high genetic diversity with a large gene flow among the localities studied and expanded during the recent evolutionary past. All haplotypes from both markers are novel for the species, according to the NCBI GenBank. The high genetic diversity and genetic connectivity among sites suggests that the size of blue crab populations in the ALS has not been drastically affected by past exploitation. Finally, management strategies are proposed to protect the species. |
| Databáze: | OpenAIRE |
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