Geographical variation in the genetic diversity and composition of the endangered Queen Conch Strombus gigas (Mesogastropoda: Strombidae) from Yucatán, México

Pérez‐Enríquez, Ricardo; García‐Rodríguez, Francisco J.; Mendoza‐Carrión, G.; Padilla, Claudia

doi:10.15517/rbt.v0i0.3384

Cited by 8 publications

(11 citation statements)

References 28 publications

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“…The neighbour joining (NJ) tree is in congruence with the pattern of genetic structure found (Fig 4), where Group 3 was significantly different from the other groups except for Group 1A which is closest geographically and consistent with the genetic structure pattern of queen conch in Yucatan, Mexico [20]. Contrastingly, Campton et al [54] described queen conch as displaying spatial and temporal genetic variation as geographical distance did not correlate with relatedness of individuals, instead he attributed this genetic patchiness to pre-settlement events due to stochastic variations in the marine environment, temporal variations in recruit source for each locality and/or genetic drift.…”

Section: Resultssupporting

confidence: 77%

Section: Figuresupporting

confidence: 78%

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Genetic composition of queen conch (Lobatus gigas) population on Pedro Bank, Jamaica and its use in fisheries management

Blythe-Mallett

Aiken

Segura-García

et al. 2021

Preprint

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The queen conch fishery in Jamaica is sustained by Pedro Bank, which is the main harvesting site located approximately 80 km south-west from Kingston. Due to its relative size, Pedro Bank has been subdivided into zones for management purposes by the Fisheries Division and the Veterinary Services Division. Understanding whether these sub-divisions reflect different sub-populations is critical for managing exploitation levels because fisheries management must demonstrate that harvesting does not endanger the future viability of the population as queen conch are on Appendix II of the Convention in Trade in Endangered Species of Wild Fauna and Flora (CITES). This determination is essential for the continued export to international markets such as the European Union. Two hundred and eight samples were collected across the entire Pedro Bank and were genetically characterized using nine polymorphic microsatellite loci. Population structure analysis for Lobatus gigas from Pedro Bank yielded low but significant values (FST = 0.009: p = 0.006) and suggested a high magnitude of gene flow indicative of a fit and viable population throughout the bank. Analysis of molecular variance (AMOVA) indicated a 100% variation within individual samples with little variation (0.9%) between populations. In contrast pairwise genetic comparisons identified significant differences between populations located to the south eastern and eastern region of the bank to those in the central and western locations. Bayesian clustering analysis also indicated the likelihood of two population sub-divisions (K=2) on Pedro Bank. The results provided evidence of a weak but significant population structure which has crucial implications for the fishing industry as it suggests the use of ecosystem based management (EBM) in setting quotas to promote sustainable harvesting of L. gigas within each monitoring zone on Pedro Bank.

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Section: Resultssupporting

confidence: 77%

Section: Figuresupporting

confidence: 78%

Genetic composition of queen conch (Lobatus gigas) population on Pedro Bank, Jamaica and its use in fisheries management

Blythe-Mallett

Aiken

Segura-García

et al. 2021

Preprint

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“…Perez‐Enriquez et al. () hypothesized that clinal patterns in haplotype frequencies were caused by isolation‐by‐distance. Likewise, Mitton et al.…”

Section: Discussionmentioning

confidence: 99%

“…Early genetic studies of L. gigas using electrophoretic methods found a high degree of gene flow among populations dispersed over the species’ geographic distribution, with definitive separation observed only between populations in Bermuda and those in the Caribbean basin (Mitton, Berg, & Orr, ). At the local level, Perez‐Enriquez, Garcia‐Rodriguez, Mendoza‐Carrion, and Padilla () and Zamora‐Bustillos, Rodríguez‐Canul, García de León, and Tello‐Cetina () found with mitochondrial DNA and microsatellites, respectively, low genetic differentiation among locations in the Mexican Caribbean. In the Florida Keys and Bimini, Campton, Berg, Robinson, and Glazer () also found low genetic differentiation.…”

Section: Introductionmentioning

confidence: 98%

Isolation by oceanic distance and spatial genetic structure in an overharvested international fishery

Truelove

Box

Aiken

et al. 2017

Diversity and Distributions

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Aim:A detailed understanding of spatial genetic structure (SGS) and the factors driving contemporary patterns of gene flow and genetic diversity are fundamental for developing conservation and management plans for marine fisheries. We performed a detailed study of SGS and genetic diversity throughout the overharvested queen conch (Lobatus gigas) fishery. Caribbean countries were presented as major populations to examine transboundary patterns of population differentiation.Location: Nineteen locations in the greater Caribbean from Anguilla, the Bahamas, Belize, Caribbean Netherlands, Honduras, Jamaica, Mexico, Turks and Caicos, and the USA. Methods:We genotyped 643 individuals with nine microsatellites. Population genetic and multivariate analyses characterized SGS. We tested the alternate hypotheses: (1) SGS is randomly distributed in space or (2) pairwise genetic structure among sites is correlated with oceanic distance (IBOD). Results: Our study found that L. gigas does not form a single panmictic population in the greater Caribbean. Significant levels of genetic differentiation were identified between Caribbean countries (F CT = 0.011; p = .0001), within Caribbean countries (F SC = 0.003; p = .001), and among sites irrespective of geographic location (F ST = 0.013; p = .0001). Gene flow across the greater Caribbean was constrained by oceanic distance (p = .0009; Mantel r = .40), which acted to isolate local populations.Main conclusions: Gene flow over the spatial scale of the entire Caribbean basin is constrained by oceanic distance, which may impede the natural recovery of overfished L. gigas populations. Our results suggest a careful blend of local and international management will be required to ensure long-term sustainability for the species. K E Y W O R D Sconnectivity, conservation, dispersal, fisheries, genetics, spatial | 1293 TRUELOVE ET aL.

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“…The aquaculture or semi‐culture of species of interest (Brownell ; Creswell ) is emerging as a good management alternative for establishing whether repopulation is feasible. The study of all aspects of these alternatives, including strategies for the conservation of this species, is fundamental to their success (Pérez‐Enriquez, Garcia‐Rodriguez, Mendoza‐Carrion & Padilla ). In addition to the ecology of the queen conch, such studies should incorporate the characteristics of the conch, its associated microbiota and how the microbiotic organisms could be directly related to the growth and development of the conch (Verschuere, Rombaut, Sorgeloos & Verstraete ).…”

Section: Introductionmentioning

confidence: 99%

Assessment of the bacterial community diversity associated with the queen conchStrombus gigas(Linnaeus, 1758) from the Caribbean coast of Colombia using denaturing gradient gel electrophoresis and culturing

et al. 2012

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Assessment of the bacterial community diversity associated with the queen conch Strombus gigas (Linnaeus, 1758) from the Caribbean coast of Colombia using denaturing gradient gel electrophoresis and culturing Abstract The biotic diversity of Strombus gigas has not been thoroughly studied despite the status of the queen conch as an important ecological resource. The bacteria associated with the conch influence their host in several ways, including through the metabolism of nutrients, protection against invasive bacteria and the regulation of the physical conditions. In this study, conventional microbiological methods and molecular tools such as denaturing gradient gel electrophoresis (DGGE) were used to assess the composition of the bacterial communities associated with the queen conch (S. gigas) in wild and captive habitats in Colombia. A genetic analysis of the bacterial communities revealed a high level of diversity based on the large number of bands detected using DGGE. In addition, differences in bacterial community structure were found between the conchs in captivity and the wild populations. The dominant phylogenetic affiliations of the bacteria, as determined using 16S rRNA gene sequencing, were grouped into four classes, namely, Betaproteobacteria (16%), Gammaproteobacteria (70%), Firmicutes (7%) and Actinobacteria (2%). These groups are related to host defence processes and the decomposition of organic matter. The 16S rDNA sequence analysis of the cultured bacteria and the resulting DGGE profiles are useful tools for characterizing the diversity of the bacteria associated with the analyzed conchs.

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Geographical variation in the genetic diversity and composition of the endangered Queen Conch Strombus gigas (Mesogastropoda: Strombidae) from Yucatán, México

Cited by 8 publications

References 28 publications

Genetic composition of queen conch (Lobatus gigas) population on Pedro Bank, Jamaica and its use in fisheries management

Genetic composition of queen conch (Lobatus gigas) population on Pedro Bank, Jamaica and its use in fisheries management

Isolation by oceanic distance and spatial genetic structure in an overharvested international fishery

Assessment of the bacterial community diversity associated with the queen conchStrombus gigas(Linnaeus, 1758) from the Caribbean coast of Colombia using denaturing gradient gel electrophoresis and culturing

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