Low levels of global genetic differentiation and population expansion in the deep-sea teleost Hoplostethus atlanticus revealed by mitochondrial DNA sequences

Varela, Andrea I.; Ritchie, Peter A.; Smith, Peter

doi:10.1007/s00227-012-1885-x

Cited by 35 publications

(48 citation statements)

References 70 publications

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“…This outcome would be expected for populations linked by intense gene flow, a scenario commonly observed in a number of marine species [70]. The high indices of genetic diversity recorded in the present study, especially for the mitochondrial markers, and particularly the Control Region, are a common feature of marine teleosts, including lutjanids [5,6,53,71,72], and have been recorded previously in O . chrysurus [16].…”

Section: Discussionsupporting

confidence: 81%

High Levels of Genetic Connectivity among Populations of Yellowtail Snapper, Ocyurus chrysurus (Lutjanidae – Perciformes), in the Western South Atlantic Revealed through Multilocus Analysis

et al. 2015

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In the present study, five loci (mitochondrial and nuclear) were sequenced to determine the genetic diversity, population structure, and demographic history of populations of the yellowtail snapper, Ocyurus chrysurus, found along the coast of the western South Atlantic. O. chrysurus is a lutjanid species that is commonly associated with coral reefs and exhibits an ample geographic distribution, and it can therefore be considered a good model for the investigation of phylogeographic patterns and genetic connectivity in marine environments. The results reflected a marked congruence between the mitochondrial and nuclear markers as well as intense gene flow among the analyzed populations, which represent a single genetic stock along the entire coast of Brazil between the states of Pará and Espírito Santo. Our data also showed high levels of genetic diversity in the species (mainly mtDNA), as well a major historic population expansion, which most likely coincided with the sea level oscillations at the end of the Pleistocene. In addition, this species is intensively exploited by commercial fisheries, and data on the genetic structure of its populations will be essential for the development of effective conservation and management plans.

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Section: Discussionsupporting

confidence: 81%

High Levels of Genetic Connectivity among Populations of Yellowtail Snapper, Ocyurus chrysurus (Lutjanidae – Perciformes), in the Western South Atlantic Revealed through Multilocus Analysis

et al. 2015

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“…This pattern is the first described in the genus Mesoplodon, and while our samples cover approximately one-third of the species' range, further samples are needed from South Africa, South America and the Southern Ocean to confirm this finding. There are both fish and squid species that exhibit similar levels of connectivity across comparable spatial scales (e.g., orange roughy (Hoplostethus atlanticus), Varela et al, 2012; giant squid (Architeuthis spp. ), Winkelmann et al, 2013) and it is likely that there are aspects of these species' population biology that are common.…”

Section: Discussionmentioning

confidence: 99%

Bucking the trend: genetic analysis reveals high diversity, large population size and low differentiation in a deep ocean cetacean

et al. 2015

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Understanding the genetic structure of a population is essential to its conservation and management. We report the level of genetic diversity and determine the population structure of a cryptic deep ocean cetacean, the Gray's beaked whale (Mesoplodon grayi). We analysed 530 bp of mitochondrial control region and 12 microsatellite loci from 94 individuals stranded around New Zealand and Australia. The samples cover a large area of the species distribution (~6000 km) and were collected over a 22-year period. We show high genetic diversity (h = 0.933-0.987, π = 0.763-0.996% and R s = 4.22-4.37, H e = 0.624-0.675), and, in contrast to other cetaceans, we found a complete lack of genetic structure in both maternally and biparentally inherited markers. The oceanic habitats around New Zealand are diverse with extremely deep waters, seamounts and submarine canyons that are suitable for Gray's beaked whales and their prey. We propose that the abundance of this rich habitat has promoted genetic homogeneity in this species. Furthermore, it has been suggested that the lack of beaked whale sightings is the result of their low abundance, but this is in contrast to our estimates of female effective population size based on mitochondrial data. In conclusion, the high diversity and lack of genetic structure can be explained by a historically large population size, in combination with no known exploitation, few apparent behavioural barriers and abundant habitat.

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“…Such barriers preventing the random mixing of eggs and larvae may determine the level and distribution of genetic diversity and result in genetically or morphologically distinct populations (Dawson et al , ; Weersing & Toonen, ; D'Aloia et al , ). Other factors, such as reproductive behaviour or migration, can also affect population structure in marine fishes (Shaw, ; Kim et al , 2010 a , b ; Varela et al , ). In this regard, research efforts to understand historical and contemporary gene flow among locations are essential for management of fisheries and conservation of specific marine fishes.…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity and population structure of Hyporhamphus sajori (Beloniformes: Hemiramphidae) inferred from mtDNA control region and msDNA markers

Kai

Kim

2016

Journal of Fish Biology

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This paper presents preliminary data on the genetic diversity and population structure of Hyporhamphus sajori by analysing a 510 bp sequence in the mitochondrial DNA (mtDNA) control region and eight polymorphic microsatellite DNA loci. The H. sajori individuals from different locations were indistinguishable from one another based on mtDNA variation, as demonstrated with a neighbour-joining tree and minimum spanning network analysis. Low level of genetic diversity and the absence of population structure in H. sajori from the north-west Pacific Ocean, combined with negative indices for neutral evolution in these populations, suggest that H. sajori underwent a population expansion after a recent bottleneck. The Structure analysis, discriminant analysis of principal components (DAPC) and the pair-wise Φ values after Bonferroni correction using eight microsatellite loci provided no clear inference on the genetic differentiation and thus no evidence of population structure of H. sajori. The genetic connectivity among locations might be due to fairly high gene flow via transport of eggs and larvae by the Kuroshio and Tsushima warm current. This study revealed low levels of genetic diversity and suggested high level of contemporary gene flow among populations of H. sajori in the East (Japan) Sea and the Pacific Ocean.

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Low levels of global genetic differentiation and population expansion in the deep-sea teleost Hoplostethus atlanticus revealed by mitochondrial DNA sequences

Cited by 35 publications

References 70 publications

High Levels of Genetic Connectivity among Populations of Yellowtail Snapper, Ocyurus chrysurus (Lutjanidae – Perciformes), in the Western South Atlantic Revealed through Multilocus Analysis

High Levels of Genetic Connectivity among Populations of Yellowtail Snapper, Ocyurus chrysurus (Lutjanidae – Perciformes), in the Western South Atlantic Revealed through Multilocus Analysis

Bucking the trend: genetic analysis reveals high diversity, large population size and low differentiation in a deep ocean cetacean

Genetic diversity and population structure of Hyporhamphus sajori (Beloniformes: Hemiramphidae) inferred from mtDNA control region and msDNA markers

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