Population genomics of short-finned pilot whales (Globicephala macrorhynchus) from the Caribbean Sea
| Autor: | Restrepo Garzón, Nicolás |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Séneca: repositorio Uniandes Universidad de los Andes instacron:Universidad de los Andes |
| Popis: | Globicephala macrorhynchus has been poorly documented in the Caribbean, lacking information at the population level. They are affected by anthropogenic threats, and it is hypothesized that their populations are declining. Some studies have shown a strong genetic structure in populations from the Pacific Ocean, while little is known about the Caribbean area, a strategic zone for the conservation of the species. For this reason, we sought to identify the population structure, demography, and genetic diversity of the short-finned pilot whales in the Caribbean Sea to obtain information on their current conservation status. From 72 individuals from six locations in the Caribbean, RADseq was performed for SNPs genotyping, and mtDNA Control Region was amplified to identify haplotypes; management units (MU) were delimited using structure analysis by Bayesian inference, PCA and species tree of maximum likelihood. Then, the effective population size, gene flow and genetic diversity parameters were calculated. Finally, a haplotype network was constructed and genetic diversity values were calculated from mtDNA. The species was found to represent a monophyletic group with a population substructure of three dominant genetic groups with restricted gene flow between them. Three MUs were identified in Saint Vincent and the Grenadines (VCT): two of them were exclusive to these islands and one had the lowest diversity and demographic values. This pattern may indicate a coastal population that is resident in Saint Vincent and the Grenadines, and a pelagic population distributed along the Caribbean. When comparing our results with other available information on this species and related species, we can conclude that, in the Caribbean, diversity and demographic values are not alarming. However, hunting is a pressure in this particular area that could increase this population structure and must be evaluated in terms of protecting the resident populations that contribute to the genetic diversity in the Caribbean. It is concluded that G. macrorhynchus, in the analyzed portion of the Caribbean Sea, is in a good state of conservation and there are three dominant genetic stocks (MU) that suggest the need to implement special conservation measures in VCT. Corporación Centro de Excelencia en Ciencias Marinas (CEMarin) Universidad de los Andes Magíster en Ciencias Biológicas Maestría Genética de la conservación |
| Databáze: | OpenAIRE |
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