2,831 research outputs found
Grouper Spawning Aggregations Off the Yucatan Peninsula, Mexico: Fishing, Management, and Conservation
Fishing, management, and conservation of the Nassau grouper, Epinephelus striatus, in the Mexican Caribbean
Lionfish Invasion off the Northern Coast of the Yucatan Peninsula, Mexico, Southern Gulf of Mexico: What Do we Know?
Validación de una Agrupación de Desove de Mero Payaso, Epinephelus guttatus, en Parque Nacional Arrecife Alacranes Frente a la Costa Norte de la Península de Yucatán, México
Dieta del Pez León Rojo, Pterois volitans, en el Parque Nacional Arrecife Alacranes, Sureste del Golfo de México
Settlement dynamics of the bicolor damselfish, Stegastes partitus, in Chinchorro Bank, Mexican Caribbean
Cambio de Fase Alga-coral en el Parque Nacional Arrecife Alacranes, México: Una Aproximación por Grupos Funcionales
Population genomics of local adaptation versus speciation in coral reef fishes (Hypoplectrus spp, Serranidae)
Are the population genomic patterns underlying local adaptation and the early stages of speciation similar? Addressing this question requires a system in which (i) local adaptation and the early stages of speciation can be clearly identified and distinguished, (ii) the amount of genetic divergence driven by the two processes is similar, and (iii) comparisons can be repeated both taxonomically (for local adaptation) and geographically (for speciation). Here, we report just such a situation in the hamlets (Hypoplectrus spp), brightly colored reef fishes from the wider Caribbean. Close to 100,000 SNPs genotyped in 126 individuals from three sympatric species sampled in three repeated populations provide genome-wide levels of divergence that are comparable among allopatric populations (Fst estimate = 0.0042) and sympatric species (Fst estimate = 0.0038). Population genetic, clustering, and phylogenetic analyses reveal very similar patterns for local adaptation and speciation, with a large fraction of the genome undifferentiated (Fst estimate ≈ 0), a very small proportion of Fst outlier loci (0.05–0.07%), and remarkably few repeated outliers (1–3). Nevertheless, different loci appear to be involved in the two processes in Hypoplectrus, with only 7% of the most differentiated SNPs and outliers shared between populations and species comparisons. In particular, a tropomyosin (Tpm4) and a previously identified hox (HoxCa) locus emerge as candidate loci (repeated outliers) for local adaptation and speciation, respectively. We conclude that marine populations may be locally adapted notwithstanding shallow levels of genetic divergence, and that from a population genomic perspective, this process does not appear to differ fundamentally from the early stages of speciation
Population Structure and Phylogeography in Nassau Grouper (Epinephelus striatus), a Mass-Aggregating Marine Fish
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