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Native bighead carp Hypophthalmichthys nobilis and silver carp Hypophthalmichthys molitrix populations in the Pearl River are threatened by Yangtze River introductions as revealed by mitochondrial DNA.
J Fish Biol. 2020 Mar; 96(3):651-662.JF

Abstract

Bighead carp Hypophthalmichthys nobilis and silver carp Hypophthalmichthys molitrix have been two economically important aquaculture species in China for centuries. In the past decades, bighead and silver carp have been introduced from the Yangtze River to many river systems in China, including the Pearl River, in annual, large-scale, stocking activities to enhance wild fisheries. Nonetheless, few studies have assessed the ecological or genetic impacts of such introductions on native conspecific fish populations. An mtDNA D-loop segment of 978 bp from 213 bighead carp samples from 9 populations and a 975 bp segment from 204 silver carp samples from 10 populations were obtained to evaluate genetic diversity and population integrity. Results from a haplotype network analysis revealed that most haplotypes of the Pearl River clustered with those of Yangtze River origin and only a small proportion were distinct, suggesting that both the native Pearl River bighead and silver carp populations are currently dominated by genetic material from the Yangtze River. The genetic diversity of Pearl River populations is high in both species because of this inter-population gene flow, but the diversity of native Pearl River populations is low. To preserve the native genetic diversity, stocking of non-native fingerlings should cease immediately and native Pearl River bighead and silver carp fish farms should be established. This research demonstrates the danger to native biodiversity across China because of the substantial, ongoing stock-enhancement activities without prior genetic assessment.

Authors+Show Affiliations

Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally Friendly Aquaculture, School of Life Science, South China Normal University, Guangzhou, China. Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland.Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally Friendly Aquaculture, School of Life Science, South China Normal University, Guangzhou, China.Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally Friendly Aquaculture, School of Life Science, South China Normal University, Guangzhou, China.Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland.College of Fisheries, Central Agricultural University, Agartala, India.Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland.Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangdong Provincial Engineering Technology Research Center for Environmentally Friendly Aquaculture, School of Life Science, South China Normal University, Guangzhou, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31919843

Citation

Li, Chao, et al. "Native Bighead Carp Hypophthalmichthys Nobilis and Silver Carp Hypophthalmichthys Molitrix Populations in the Pearl River Are Threatened By Yangtze River Introductions as Revealed By Mitochondrial DNA." Journal of Fish Biology, vol. 96, no. 3, 2020, pp. 651-662.
Li C, Wang J, Chen J, et al. Native bighead carp Hypophthalmichthys nobilis and silver carp Hypophthalmichthys molitrix populations in the Pearl River are threatened by Yangtze River introductions as revealed by mitochondrial DNA. J Fish Biol. 2020;96(3):651-662.
Li, C., Wang, J., Chen, J., Schneider, K., Veettil, R. K., Elmer, K. R., & Zhao, J. (2020). Native bighead carp Hypophthalmichthys nobilis and silver carp Hypophthalmichthys molitrix populations in the Pearl River are threatened by Yangtze River introductions as revealed by mitochondrial DNA. Journal of Fish Biology, 96(3), 651-662. https://doi.org/10.1111/jfb.14253
Li C, et al. Native Bighead Carp Hypophthalmichthys Nobilis and Silver Carp Hypophthalmichthys Molitrix Populations in the Pearl River Are Threatened By Yangtze River Introductions as Revealed By Mitochondrial DNA. J Fish Biol. 2020;96(3):651-662. PubMed PMID: 31919843.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Native bighead carp Hypophthalmichthys nobilis and silver carp Hypophthalmichthys molitrix populations in the Pearl River are threatened by Yangtze River introductions as revealed by mitochondrial DNA. AU - Li,Chao, AU - Wang,Junjie, AU - Chen,Jiaqi, AU - Schneider,Kevin, AU - Veettil,Radhakrishnan K, AU - Elmer,Kathryn R, AU - Zhao,Jun, Y1 - 2020/01/28/ PY - 2019/06/20/received PY - 2020/01/07/accepted PY - 2020/1/11/pubmed PY - 2020/6/26/medline PY - 2020/1/11/entrez KW - bighead carp, domestic introduction, genetic diversity, the Pearl River, silver carp, stock enhancement SP - 651 EP - 662 JF - Journal of fish biology JO - J. Fish Biol. VL - 96 IS - 3 N2 - Bighead carp Hypophthalmichthys nobilis and silver carp Hypophthalmichthys molitrix have been two economically important aquaculture species in China for centuries. In the past decades, bighead and silver carp have been introduced from the Yangtze River to many river systems in China, including the Pearl River, in annual, large-scale, stocking activities to enhance wild fisheries. Nonetheless, few studies have assessed the ecological or genetic impacts of such introductions on native conspecific fish populations. An mtDNA D-loop segment of 978 bp from 213 bighead carp samples from 9 populations and a 975 bp segment from 204 silver carp samples from 10 populations were obtained to evaluate genetic diversity and population integrity. Results from a haplotype network analysis revealed that most haplotypes of the Pearl River clustered with those of Yangtze River origin and only a small proportion were distinct, suggesting that both the native Pearl River bighead and silver carp populations are currently dominated by genetic material from the Yangtze River. The genetic diversity of Pearl River populations is high in both species because of this inter-population gene flow, but the diversity of native Pearl River populations is low. To preserve the native genetic diversity, stocking of non-native fingerlings should cease immediately and native Pearl River bighead and silver carp fish farms should be established. This research demonstrates the danger to native biodiversity across China because of the substantial, ongoing stock-enhancement activities without prior genetic assessment. SN - 1095-8649 UR - https://www.unboundmedicine.com/medline/citation/31919843/Native_bighead_carp_Hypophthalmichthys_nobilis_and_silver_carp_Hypophthalmichthys_molitrix_populations_in_the_Pearl_River_are_threatened_by_Yangtze_River_introductions_as_revealed_by_mitochondrial_DNA_ L2 - https://doi.org/10.1111/jfb.14253 DB - PRIME DP - Unbound Medicine ER -