Assessment of genetic diversity and population structure of swamp eel Monopterus albus in China

Liang, Hongwei; Guo, Shanshan; Zhong, Li; Luo, Xian; Zou, Guiwei

doi:10.1016/j.bse.2016.06.006

Cited by 18 publications

(18 citation statements)

References 22 publications

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“…High levels of genetic diversity were found across sampling sites at both mitochondrial and microsatellite markers. The genetic diversity level of this study except FC sample site was higher than previous study in the same basin (Hd = 0.708 and Pi = 0.002 based on mitochondrial D-loop sequences) (Liang et al, 2016). The genetic diversity of FC samples was the lowest (Hd = 0.6620, Pi = 0.0017).…”

Section: Discussion Population Genetics Of Swamp Eelcontrasting

confidence: 78%

“…With the development of swamp eel farming, population genetic research of the wild eel became a hot topic, which has been used to guide the genetic breeding and swamp eel aquaculture. Several studies have used different markers including microsatellites, mitochondrial sequences and Inter-Simple Sequence Repeats (ISSR) to explore swamp eel population genetics (Lei et al, 2012;Li et al, 2013;Liang et al, 2016). Previous studies suggested a rapid decrease of wild swamp eel caused by the large use of pesticides and over-exploitation (Li et al, 2013;Liang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Population genetics of swamp eel in the Yangtze River: comparative analyses between mitochondrial and microsatellite data provide novel insights

Zhou

Yong

Jiang

et al. 2020

PeerJ

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The swamp eel (Monopterus albus) is a typical sex reversal fish with high economic value. Several phylogeographic studies have been performed using various markers but comparative research between mitochondrial and nuclear markers is rare. Here, a fine-scale study was performed across six sites along the Yangtze River including three sites on the main stem and three sites from tributaries. A total of 180 swamp eel individuals were collected. Genetic structure and demographic history were explored using data from two mitochondrial genes and eight microsatellite loci. The results revealed the samples from tributary sites formed three separate clades which contained site-specific lineages. Geographic isolation and the habitat patchiness caused by seasonal cutoff were inferred to be the reasons for this differentiation. Strong gene flow was detected among the sites along the main stem. Rapid flow of the river main stem may provide the dynamic for the migration of swamp eel. Interestingly, the comparative analyses between the two marker types was discordant. Mitochondrial results suggested samples from three tributary sites were highly differentiated. However, microsatellite analyses indicated the tributary samples were moderately differentiated. We conclude this discordance is mainly caused by the unique life history of sex reversal fish. Our study provides novel insights regarding the population genetics of sex reversal fish.

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Section: Discussion Population Genetics Of Swamp Eelcontrasting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Population genetics of swamp eel in the Yangtze River: comparative analyses between mitochondrial and microsatellite data provide novel insights

Zhou

Yong

Jiang

et al. 2020

PeerJ

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“…The results revealed that these chicken breeds had a rich genetic diversity. It is generally known that haplotype diversity and nucleotide diversity of mtDNA are the important index for assessing population polymorphism and genetic differentiation (Liu et al, 2006b;Liang et al, 2016). The haplotype diversity results showed that the genetic variation of SD, JY, EM, LN, JYS, YY and DH in this study were abundant with the haplotype diversity value more than 0.80.…”

Section: Discussionmentioning

confidence: 49%

Genetic Diversity and Phyletic Evolution of Eleven Chinese Indigenous and Three Commercial Chicken Breeds by mtDNA Sequences

Qiu

Jiang

et al. 2019

Braz. J. Poult. Sci.

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Chinese indigenous chicken breeds are geographically widespread, and a total of 116 indigenous chicken breeds are listed as Chinese national genetic resources. However, these indigenous chicken breeds are facing serious challenges as declining population and germplasm degeneration because lots of commercial chicken breeds had been introduced. In this study, the genetic variations of eleven Chinese indigenous chicken breeds of Sichuan province and three commercial chicken breeds were investigated based on the partial mitochondrial DNA D-loop of 487bp in length. 147 individuals from 14 breeds were examined and 34 haplotypes were observed. Genetic diversity analysis showed that the highest haplotype diversity level was found in Dahen Chicken (DH) population, while the Arbor Acres Chicken (WF) and Roman layer (RM) showed lower genetic diversity levels. The long-term artificial selection may lead to reduced nucleotide diversity. Genetic population differentiation analysis indicated that most of the variation (80.80%) was attributed to variations among breeds. Phylogenetic analysis revealed that these individuals were divided into four distinct genetic clades, including cluster A, B, C and D. Eighteen haplotypes were classified as cluster A, eight haplotypes were classified as cluster B, five haplotypes were classified as cluster C and three haplotypes were classified as cluster D. There was no breed-specific clade. Our study firstly identified the population's genetic structure of Chinese indigenous chickens and the most important commercial breeds in Sichuan province, though the genetic diversity of indigenous breeds did not suffer obvious decrease, but could be helpful for efficient artificial breeding selection and genetic resources conservation.

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“…Belut dijadikan bahan pangan oleh etnis Asia (Affandi et al, 2003;Nico et al, 2011). Ikan belut menjadi komoditas ikan paling penting pada masyarakat Tiongkok (Liang et al, 2016), sehingga selain untuk memenuhi pasar lokal, ikan belut ini memiliki potensi untuk ekspor. Tujuan ekspor perikanan Indonesia terutama adalah ke Tiongkok dengan pangsa mencapai 14% (IEI, 2019).…”

Section: Pendahuluanunclassified

“…Permintaan belut yang terus meningkat tetapi tidak bisa diimbangi oleh produksi belut di Indonesia menyebabkan harga belut hidup cukup tinggi dan saat ini mencapai Rp70 000,00/kg. Produksi belut menghadapi tantangan penurunan populasi karena sebagian besar pasokan belut di pasar konsumsi masih berasal dari hasil tangkapan dari perairan umum (Affandi et al, 2003;Liang et al, 2016).…”

Section: Pendahuluanunclassified

Efektivitas Salinitas Air Dalam Meningkatkan Sintasan Belut Monopterus Albus Dan Pengaruhnya Terhadap Profitabilitas Penjualan Belut Hidup

Diatin

Hadiroseyani

Astuti

2019

Jurnal Riset Akuakultur

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Belut (Monopterus albus) merupakan ikan air tawar konsumsi hasil tangkapan dari perairan umum yang dijual dalam keadaan hidup dengan harga tinggi dan permintaan yang terus meningkat. Aktivitas penangkapan, transportasi, dan penampungan menimbulkan kematian yang cukup banyak sehingga mengurangi stok dan nilai penerimaan penjualan belut. Penanganan belut pasca-penangkapan dalam air salin dapat menekan tingkat kematian belut, namun dampaknya terhadap keuntungan bisnis belum diketahui. Penelitian ini bertujuan untuk mengevaluasi penampungan dalam air salin terhadap sintasan dan keuntungan usaha penjualan belut hidup. Penelitian dilakukan pada pedagang besar belut hidup di Jawa Tengah yang memperoleh pasokan belut dari berbagai lokasi di Jawa. Belut uji yang diperoleh dari tiga lokasi yaitu Ciamis, Jawa Barat; Cilacap, Jawa Tengah; dan Lumajang, Jawa Timur; masing-masing ditampung terpisah dan dipelihara selama enam hari dalam air tawar (salinitas 0 g/L) dan air tawar yang ditambah garam krosok pada konsentrasi 6 g/L. Hasil menunjukkan bahwa penampungan selama seminggu dalam salinitas 6 g/L menghasilkan tingkat sintasan belut 1,6 kali dibandingkan dengan penampungan dalam air tawar pada semua lokasi asal belut. Sintasan yang lebih tinggi tersebut meningkatkan nilai penerimaan dan keuntungan usaha.Asian swamp eel (Monopterus albus) is a highly-priced freshwater fish collected from natural waters and sold alive in the market with an ever-increasing demand. Fishing methods, transportation, and holding of live eels before being sold frequently result in significant mortality, which eventually reduces the sales revenue from the business. However, post-capture handling of the eel using saline water could reduce the mortality rate, but the impact on business profits has never been determined. This study was aimed to determine the effects of water salinity on the survival of the eels during the holding period and calculate the profit gain from live eel sales. The research was carried out in the facility of a wholesaler of live Asian swamp eel in Central Java which received eel supply from various locations in Java. The samples of eels were originated from three locations, namely Ciamis, West Java; Cilacap, Central Java; and Lumajang, East Java. The eels were placed in separate containers filled with: fresh water (salinity 0 g/L) and freshwater added with salt at concentration 6 g/L for six days. The results showed that six days holding period in salinity of 6 g/L resulted in a higher survival rate of the eels up to 1.6 times compared to the freshwater. This higher survival has increased the revenues and profitability of the live eels sales.

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Assessment of genetic diversity and population structure of swamp eel Monopterus albus in China

Cited by 18 publications

References 22 publications

Population genetics of swamp eel in the Yangtze River: comparative analyses between mitochondrial and microsatellite data provide novel insights

Population genetics of swamp eel in the Yangtze River: comparative analyses between mitochondrial and microsatellite data provide novel insights

Genetic Diversity and Phyletic Evolution of Eleven Chinese Indigenous and Three Commercial Chicken Breeds by mtDNA Sequences

Efektivitas Salinitas Air Dalam Meningkatkan Sintasan Belut Monopterus Albus Dan Pengaruhnya Terhadap Profitabilitas Penjualan Belut Hidup

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