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Article

Genetic Structure and Diversity of the Yellowbelly Threadfin Bream Nemipterus bathybius in the Northern South China Sea

by 1,2, 1, 1, 1,2, 3,* and 1,2,4,5,*
1
College of Fisheries, Guangdong Ocean University, Zhanjiang 524088, China
2
Marine Resources Big Data Center of South China Sea, Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang 524013, China
3
The Affiliated School of National Tainan First Senior High School, Tainan 701, Taiwan
4
Guangdong Provincial Engineering and Technology Research Center of Far Sea Fisheries Management and Fishing of South China Sea, Guangdong Ocean University, Zhanjiang 524088, China
5
Center of Marine Fisheries Information Technology, Shenzhen Institute of Guangdong Ocean University, Shenzhen 518035, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Bert W. Hoeksema
Diversity 2021, 13(7), 324; https://doi.org/10.3390/d13070324
Received: 2 June 2021 / Revised: 14 July 2021 / Accepted: 14 July 2021 / Published: 15 July 2021
(This article belongs to the Section Marine Diversity)
The genetic structure and demography of the yellowbelly threadfin bream, Nemipterus bathybius, in the northern South China Sea were examined using the mitochondrial DNA cytochrome b gene (1141 bp). High levels of haplotype and nucleotide diversities (0.98 and 5.26 × 10−3, respectively) showed that all populations exhibited a high level of genetic diversity. Analysis of molecular variance (AMOVA), FST statistics, and haplotype networks suggested the absence of significant genetic differentiation along the coast of the northern South China Sea. Although the results suggested that the lack of differentiation within the population structure of N. bathybius was shaped by ocean currents, our results also showed that the Qiongzhou Strait limited their migration between Beibu Gulf and the northern South China Sea. Neutrality tests and mismatch distributions indicated population expansion, but the Bayesian skyline plots and approximate Bayesian computation approaches suggested that the population sizes recently contracted. The diversification of multiple stocks, which were induced by two ocean current systems, contributed to these discordant results. Although these analyses of demographic history revealed no evidence for recent population bottlenecks, the population demography needs to be evaluated further. View Full-Text
Keywords: mitochondria; ocean currents; qiongzhou strait; demography; multiple stocks mitochondria; ocean currents; qiongzhou strait; demography; multiple stocks
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MDPI and ACS Style

Yi, M.-R.; Hsu, K.-C.; Wang, J.-X.; Feng, B.; Lin, H.-D.; Yan, Y.-R. Genetic Structure and Diversity of the Yellowbelly Threadfin Bream Nemipterus bathybius in the Northern South China Sea. Diversity 2021, 13, 324. https://doi.org/10.3390/d13070324

AMA Style

Yi M-R, Hsu K-C, Wang J-X, Feng B, Lin H-D, Yan Y-R. Genetic Structure and Diversity of the Yellowbelly Threadfin Bream Nemipterus bathybius in the Northern South China Sea. Diversity. 2021; 13(7):324. https://doi.org/10.3390/d13070324

Chicago/Turabian Style

Yi, Mu-Rong, Kui-Ching Hsu, Jin-Xi Wang, Bo Feng, Hung-Du Lin, and Yun-Rong Yan. 2021. "Genetic Structure and Diversity of the Yellowbelly Threadfin Bream Nemipterus bathybius in the Northern South China Sea" Diversity 13, no. 7: 324. https://doi.org/10.3390/d13070324

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