First evidence of population genetic structure of the deep-water blackmouth catshark Galeus melastomus Rafinesque, 1810

Frontiers in Marine Science, Год журнала: 2022, Номер 9

Опубликована: Ноя. 30, 2022

Among the main measures adopted to reduce anthropogenic impacts on elasmobranch communities, understanding ecology of deep-sea sharks is paramount importance, especially for potentially vulnerable species highly represented in bycatch composition commercial fisheries such as blackmouth catshark Galeus melastomus . In present work, we unravelled first indication population genetic structure G. by using a novel and effective panel nuclear, polymorphic DNA markers compared our results with previous findings supporting high connectivity at large spatial scales. Given lack species-specific nuclear markers, total 129 microsatellite loci (Simple Sequence Repeats, SSRs) were cross-amplified specimens collected eight geographically distant areas Mediterranean Sea North-eastern Atlantic Ocean. A 13 SSRs finally selected genotyping, based which exhibited signs weak, but tangible structure. The clearcut evidence differentiation from Scottish waters rest samples was defined, indicating that genetically structured adjacent Atlantic. Both individual frequency-based analyses identified unit formed individuals Tyrrhenian Strait Sicily, distinguished Portuguese samples. addition, Bayesian resolved certain degree separation easternmost Aegean sample admixed nature other Here, supported hypothesis interaction between biology abiotic drivers water circulations, temperature bathymetry may affect dispersion , adding new information current knowledge this deep-water providing powerful tools estimating its response impacts.

Язык: Английский

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Neither historical climate nor contemporary range fully explain the extant patterns of molecular diversity in marine species

Journal of Biogeography, Год журнала: 2021, Номер 48(10), С. 2629 - 2644

Опубликована: Авг. 10, 2021

Abstract Aim Intraspecific diversity is a significant component of adaptive potential, and thus, it important to identify the evolutionary processes that have will continue shape molecular natural populations. This study aims untangle possible drivers intraspecific by testing whether patterns historical climatic stability or contemporary range position correlate with diversity. Location South African coastline. Taxa The cape urchin ( Parechinus angulosus ), common shore crab Cyclograpsus punctatus ) granular limpet Scutellastra granularis ). Methods Species distributions were hindcasted Last Glacial Maximum assess biogeography species. Linear models built compare relationships between distributional ranges extant genetic (mtDNA) genomic (SNP) Results We found large differences in among species time periods. Regions higher habitat corresponded regions diversity, but variability was not predictor within linear models. Lower values, differentiation, detected edge populations, this consistent across marker type Main conclusions Both are potentially driving portion variation remains unexplained. Our findings suggest marine cool‐temperate bioregions Southern Hemisphere may more complex biogeographic histories than terrestrial taxa and/or coastal northern, formerly glaciated regions.

Язык: Английский

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DNA barcoding of traded shark fins in Peninsular Malaysia

Reviews in Fish Biology and Fisheries, Год журнала: 2022, Номер 32(3), С. 993 - 999

Опубликована: Май 11, 2022

Язык: Английский

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Population structure and genetic connectivity of the scalloped hammerhead shark (Sphyrna lewini) across nursery grounds from the Eastern Tropical Pacific: Implications for management and conservation

PLoS ONE, Год журнала: 2022, Номер 17(12), С. e0264879 - e0264879

Опубликована: Дек. 16, 2022

Defining demographically independent units and understanding patterns of gene flow between them is essential for managing conserving exploited populations. The critically endangered scalloped hammerhead shark, Sphyrna lewini , a coastal semi-oceanic species found worldwide in tropical subtropical waters. Pregnant females give birth shallow estuarine habitats that serve as nursery grounds neonates small juveniles, whereas adults move offshore become highly migratory. We evaluated the population structure connectivity S . areas one oceanic island (Cocos Island) across Eastern Tropical Pacific (ETP) using both sequences mitochondrial DNA control region (mtCR) 9 nuclear-encoded microsatellite loci. mtCR defined two genetically discrete groups: Mexican another central-southern (Guatemala, Costa Rica, Panama, Colombia). Overall, data showed low levels haplotype diversity ranging from 0.000 to 0.608, while nucleotide ranged 0.0015. More fine-grade was detected loci where Guatemala, Panama differed significantly. Relatedness analysis revealed individuals within were more closely related than expected by chance, suggesting may exhibit reproductive philopatric behaviour ETP. Findings at least different management units, evidence call intensive conservation actions this threatened

Язык: Английский

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Historical Mitogenomic Diversity and Population Structuring of Southern Hemisphere Fin Whales

Genes, Год журнала: 2023, Номер 14(5), С. 1038 - 1038

Опубликована: Май 3, 2023

Fin whales Balaenoptera physalus were hunted unsustainably across the globe in 19th and 20th centuries, leading to vast reductions population size. Whaling catch records indicate importance of Southern Ocean for this species; approximately 730,000 fin harvested during century Hemisphere (SH) alone, 94% which at high latitudes. Genetic samples from contemporary can provide a window past size changes, but challenges sampling remote Antarctic waters limit availability data. Here, we take advantage historical form bones baleen available ex-whaling stations museums assess pre-whaling diversity once abundant species. We sequenced 27 mitogenomes 50 mitochondrial control region sequences gain insight into structure genetic (SHFWs) before after whaling. Our data, both independently when combined with literature, suggest SHFWs are highly diverse may represent single panmictic that is genetically differentiated Northern populations. These first historic SHFWs, providing unique time series data

Язык: Английский

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Genomic assessment of an endemic Hawaiian surgeonfish, Acanthurus triostegus sandvicensis, reveals high levels of connectivity and fine-scale population structure

Coral Reefs, Год журнала: 2022, Номер 41(3), С. 687 - 697

Опубликована: Май 2, 2022

Abstract The Hawaiian Archipelago has served as a natural laboratory to assess genetic connectivity patterns across broad spectrum of taxonomic and ecological diversity. Almost all these studies were based on few targeted loci, but technologies now allow us population structure with genomic coverage greater resolution. Here, we provide SNP-based analysis for an endemic surgeonfish, Acanthurus triostegus sandvicensis (manini) the adjacent Johnston Atoll ( N = 461). Based 3649 SNPs, manini showed in main Islands, homogeneity most northwestern extent archipelago (overall F ST 0.033, P < 0.001). Net migration occurred from into Hawai‘i, providing further support being pathway dispersal (or colonization) Hawai′i. These results highlight higher efficacy sequencing characterize fine-scale relative loci approach and, moving forward, may invoke reassessment past genomics framework.

Язык: Английский

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Genomic Stock Structure of the Marine Teleost Tarakihi (Nemadactylus macropterus) Provides Evidence of Potential Fine-Scale Adaptation and a Temperature-Associated Cline Amid Panmixia

Frontiers in Ecology and Evolution, Год журнала: 2022, Номер 10

Опубликована: Май 30, 2022

Tarakihi ( Nemadactylus macropterus ) is an important fishery species with widespread distribution around New Zealand and off the southern coasts of Australia. However, little known about whether populations are locally adapted or genetically structured. To address this, we conducted whole-genome resequencing 175 tarakihi from Tasmania (Australia) to obtain a dataset 7.5 million genome-wide high-quality single nucleotide polymorphisms (SNPs). Variant filtering, F ST -outlier analysis, redundancy analysis (RDA) were used evaluate population structure, adaptive locus-environment associations. A weak but significant level neutral genetic differentiation was found between = 0.0054–0.0073, P ≤ 0.05), supporting existence at least two separate reproductive stocks. No clustering detected among (Φ &lt; 0.001, 0.77). Outlier-based, presumably variation suggests fine-scale structure locations central east (Wairarapa, Cape Campbell, Hawke’s Bay) west coast (Tasman Bay/Golden Bay Upper West Coast South Island). Allele frequencies 55 loci associated one six environmental variables, which 47 correlated strongly yearly mean water temperature. Although genes these linked various functions, most common functions integral components membrane cilium assembly. Projection RDA indicates latitudinal temperature cline. Our work provides first genomic insights panmixia in evidence cline that appears be driven by gradients, together providing crucial information inform stock assessment this species, widen ecological drivers marine species.

Язык: Английский

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Evidence of flow and low genetic structure between populations of the Gulf of Mexico and the Mexican Pacific of white mullet, Mugil curema (Pisces) inferred from single nucleotide polymorphisms

Fisheries Research, Год журнала: 2022, Номер 256, С. 106484 - 106484

Опубликована: Сен. 9, 2022

Язык: Английский

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Interdisciplinary analysis of larval dispersal for a coral reef fish: opening the black box

Marine Ecology Progress Series, Год журнала: 2021, Номер 684, С. 117 - 132

Опубликована: Дек. 20, 2021

Many marine animals have a biphasic life cycle in which demersal adults spawn pelagic larvae with high dispersal potential. An understanding of the spatial and temporal patterns larval is critical for describing connectivity local retention. Existing tools oceanography, genetics, ecology can each reveal only part overall pattern dispersal. We combined insights from coupled physical-biological model, parentage analyses, field surveys to span pathways, endpoints, recruitment convict surgeonfish Acanthurus triostegus . Our primary study region was windward coast O‘ahu, Hawai‘i. A abundance juvenile occurred along coast, highest inside Kāne‘ohe Bay. The output our numerical model showed that release location accounted most variation simulated settlement. Seasonal settlement probability apparent, observed simulations aligned situ observations recruitment. bay acted as partial retention zone, were released within or entering having much higher Genetic analyses transport modeling results, indicating self-recruitment well into sites outside. conclude Bay retains reef fish promotes based on concordant results models, observations. Such interdisciplinary approaches provide details heretofore partially revealed.

Язык: Английский

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A mitochondrial genome assembly of the opal chimaera, Chimaera opalescens Luchetti, Iglésias et Sellos 2011, using PacBio HiFi long reads

Mitochondrial DNA Part B, Год журнала: 2022, Номер 7(3), С. 434 - 437

Опубликована: Март 2, 2022

Chondrichthyans (sharks, rays and chimeras) are a fascinating highly vulnerable group of early branching gnathostomes. However, they remain comparatively poorly sampled from the point view molecular resources, with deep water taxa being particularly data deficient. The development long-read sequencing technologies enables analysis phylogenetic relationships through precise reliable assembly complete mtDNA genomes. characterization mitogenome opal chimera Chimera opalescens Luchetti, Iglésias et Sellos 2011, using technique PacBio HiFi is presented. entire was 23,411 bp long shows same overall content, i.e. 13 protein-coding genes, 22 transfer RNA 2 ribosomal as all other examined Chondrichthyan mitogenomes. Phylogenetic reconstructions available mitogenomes, including 11 Holocephali (chimeras ratfishes), places C. within Chimaeridae family. Furthermore, results reinforce previous findings, showing genus paraphyletic thus highlighting need to expand approaches in this cartilaginous fishes.

Язык: Английский

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