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Complete mitogenome of two dolphinfishes (Coryphaena hippurus and Coryphaena equiselis) from South China sea.

ABSTRACT: The Coryphaenidae family comprises of single genus, Coryphaena, which includes two species: Coryphaena hippurus and Coryphaena equiselis. In this study, we described the complete mitochondrial genome of the two species in Coryphaena. The assembled mitogenome of C. hippurus and C. equiselis consists of 16731?bp and 16690?bp, respectively. Two mitogenomes contain the typical gene complement including 13 protein-coding genes, 22 transfer RNAs, 2 ribosomal RNA genes and a non-coding D-loop. The longest protein-coding genes of these species was ND5, whereas the shortest ATP8. The length of D-loop is 1168?bp (C. hippurus) and 1206?bp (C. equiselis).

SUBMITTER: Xu L

PROVIDER: S-EPMC7799921 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature

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Complete mitogenome of two dolphinfishes (Coryphaena hippurus and Coryphaena equiselis) from South China sea.

Xu Lei L Wang Xuehui X Li Hong H Du Feiyan F

Mitochondrial DNA. Part B, Resources 20180922 2

The Coryphaenidae family comprises of single genus, Coryphaena, which includes two species: Coryphaena hippurus and Coryphaena equiselis. In this study, we described the complete mitochondrial genome of the two species in Coryphaena. The assembled mitogenome of C. hippurus and C. equiselis consists of 16731 bp and 16690 bp, respectively. Two mitogenomes contain the typical gene complement including 13 protein-coding genes, 22 transfer RNAs, ...[more]

PMID: 33474431

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Project description:BackgroundMarine species constitute commercially important resources, and knowledge about mechanisms that shape phylogeographic patterns and genetic structure provides valuable information for conservation. The dolphinfish, Coryphaena hippurus, is one of the most important species caught in the Tropical Eastern Pacific (TEP). However, the lack of consensus about the existence of genetically differentiated populations in the area has hindered the adoption of management strategies to ensure its viability.MethodsWe assessed genetic variation and phylogeographic structure using two mitochondrial genes and 14 nuclear DNA microsatellite loci. Population genetic tools were used to characterize the spatial distribution of genetic variation of C. hippurus in the TEP, evaluate the extent of connectivity between dolphinfish populations, infer potential barriers to gene flow, and test for signals of contemporary and historical demographic expansions.ResultsMitochondrial DNA sequences showed genetic homogeneity across locations in the TEP, as well as a strong signal of population expansion dated to the late Pleistocene. In contrast, nuclear microsatellite markers resolved four genetically distinct groups with a remarked genetic differentiation between the most distant locations, at the northern and southern boundaries of the species' range. High mean genetic diversity was found at all localities (Hs = 0.66-0.81). Notwithstanding, positive F IS and low effective population size (Ne = 77.9-496.4) were also recorded.ConclusionsThe distribution of genetic variation could be related to expansion-contraction cycles following seasonal temperature changes at transitional areas, promoting population subdivisions. However, we cannot rule out the effect of oceanographic dynamics to the observed patterns. Although this marine species remains highly abundant despite commercial exploitation, the low Ne values are of conservation concern and must be considered in fishery management plans.

Dataset Information

Complete mitogenome of two dolphinfishes (Coryphaena hippurus and Coryphaena equiselis) from South China sea.

Publications

Complete mitogenome of two dolphinfishes (<i>Coryphaena hippurus</i> and <i>Coryphaena equiselis</i>) from South China sea.

Similar Datasets

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