Phylogeography and evolutionary history of the Panamic Clingfish Gobiesox adustus in the Tropical Eastern Pacific

Torres-Hernández, Eloísa; Betancourt‐Resendes, Isaí; Solís-Guzmán, María Gloria; Robertson, D. Ross; Angulo, Arturo; Martı́nez-Gómez, Juan E.; Espinoza, Eduardo; Domínguez‐Domínguez, Omar

doi:10.1016/j.ympev.2022.107496

Cited by 4 publications

(2 citation statements)

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“…Historically, genetic structure for rocky reef fishes distributed in the TEP has been found to be strongly associated with the presence of sandy gaps in the TEP that act as barriers ( Sandoval-Huerta et al, 2019 ; Torres-Hernández et al, 2022 ). However, snapper species are characterized by high gene flow mediated by pelagic larval dispersal ( Hernández-Álvarez et al, 2020 ), and they inhabit different habitats during different life stages (juveniles individuals are found in mangroves or estuaries and adults inhabit rock substrate), making these sandy gaps less important as barriers ( Reguera-Rouzaud et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

“…1 , Table 1 ). Samples were collected and preserved following procedures described in ( Torres-Hernández et al, 2022 ). Tissue samples were stored at the Laboratorio de Genética at the Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, and in the Icthyological Collection of the Laboratorio de Biología Acuática, of Universidad Michoacana de San Nicolas de Hidalgo, México (SEMARNAT registration number CPUM-PEC-227-07-09).…”

Section: Methodsmentioning

confidence: 99%

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Genomic assessment reveals signal of adaptive selection in populations of the Spotted rose snapper Lutjanus guttatus from the Tropical Eastern Pacific

Mar‐Silva

Díaz‐Jaimes

Domínguez-Mendoza

et al. 2023

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Background The lack of barriers in the marine environment has promoted the idea of panmixia in marine organisms. However, oceanographic conditions and habitat characteristics have recently been linked to genetic structure in marine species. The Tropical Eastern Pacific (TEP) is characterized by dynamic current systems and heterogeneous oceanographic conditions. The Gulf of Panama (part of the equatorial segment for the TEP) is influenced by a complex current system and heterogeneous environment, which has been shown to limit the gene flow for shoreline species. Next Generation Sequencing (NGS) has contributed to detect genetic differences in previously reported panmictic species by the assessment of loci associated with selection and to understand how selection acts affects marine populations. Lutjanus guttatus is a species distributed in the TEP for which previous studies using mitochondrial data recovered a panmictic pattern along its distributional range. In this study, we used SNP data of L. guttatus individuals sampled along its range to evaluate population genetic structure and investigate whether oceanographic factors influence the species’ genetic architecture. Finally, we assessed the role of adaptive selection by evaluating the contribution of outlier and neutral loci to genetic divergence. Methods The RADcap method was used to obtain 24 million paired reads for 123 individuals of L. guttatus covering nearly all its distributional area. Genetic variation was assessed using both spatial and non-spatial methods by comparing three different data sets: (i) a Combined Loci (CL dataset = 2003 SNPs); a search for putative loci under selection allowed the evaluation of (ii) Neutral Loci (NL dataset = 1858 SNPs) and (iii) Outlier Loci (OL dataset = 145 SNPs). We used the estimating effective migration surface (EEMS) approach to detect possible barriers to gene flow. Results Genetic differences were found in the OL dataset, showing two clusters (Northern and Southern), whereas NL showed no differences. This result may be related to the Selection-Migration balance model. The limit between the Northern and Southern groups was in the Gulf of Panama, which has been previously identified as a barrier to gene flow for other species, mainly due to its heterogeneous oceanographic conditions. The results suggest that selection plays an important role in generating genetic differences in Lutjanus guttatus. A migration corridor was detected that coincides with the Costa Rica Coastal Current that flows from Central America to the Gulf of California, allowing the homogenization of the northern population. In the Southern cluster, a migration corridor was observed with the OL from Panama to Colombia, which could be associated with the currents found in the Gulf of Panama. Genetic variation found in the OL of Lutjanus guttatus highlights the usefulness of NGS data in evaluating the role of selection in population differentiation.

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