Population Genetic Analysis for Stock Enhancement of Silver Sea Bream (<i>Rhabdosargus</i> <i>sarba</i>) in Taiwan
Stock enhancement is a method for replenishing depleted wild finfish populations by supplementing them with hatchery-raised fish. In Taiwan, silver sea bream (<i>Rhabdosargus sarba</i>) is a predominant commercial species involved in stock enhancement projects. Although management agenci...
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| Format: | Article |
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MDPI AG
2020-06-01
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| Series: | Fishes |
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| Online Access: | https://www.mdpi.com/2410-3888/5/2/19 |
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| author | Te-Hua Hsu Chang-Wen Huang Hung-Tai Lee Yi-Hsuan Kuo Kwang-Ming Liu Cheng-Hui Lin Hong-Yi Gong |
| author_facet | Te-Hua Hsu Chang-Wen Huang Hung-Tai Lee Yi-Hsuan Kuo Kwang-Ming Liu Cheng-Hui Lin Hong-Yi Gong |
| author_sort | Te-Hua Hsu |
| collection | DOAJ |
| description | Stock enhancement is a method for replenishing depleted wild finfish populations by supplementing them with hatchery-raised fish. In Taiwan, silver sea bream (<i>Rhabdosargus sarba</i>) is a predominant commercial species involved in stock enhancement projects. Although management agencies conduct stock enhancement projects, there are a lot of private releases without records. Stock enhancement is performed by the private aquaculture sector without accurate genetic records, potentially leading to unintended consequences for wild populations. We analyzed the genetics of 459 wild and 701 hatchery-reared specimens from nine batches produced by various hatcheries. Wild and hatchery-reared samples could be considered two separate clades by using a set of stable and informative microsatellite markers including type I (from gene introns and 3′UTR) and type II markers (randomly picked up from genome). Type I microsatellite markers could more sensitively reflect the loss of genetic diversity more than type II markers in the domestication process. All specimens were considered native by using mtDNA <i>COI</i> and microsatellites. The genetic composition of the wild population is relatively simple, and the estimated low contribution rate of the hatchery stock (1.3–10.9%; 6–50/459) indicated a weak but significant genetic effect of stock enhancement. Therefore, establishing standards for the stock enhancement of silver sea bream for more effective supplementation of wild populations is imperative. |
| first_indexed | 2024-03-10T19:07:43Z |
| format | Article |
| id | doaj.art-0ff318e22ff04b118b85e9bb2b585dfb |
| institution | Directory Open Access Journal |
| issn | 2410-3888 |
| language | English |
| last_indexed | 2024-03-10T19:07:43Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fishes |
| spelling | doaj.art-0ff318e22ff04b118b85e9bb2b585dfb2023-11-20T04:01:44ZengMDPI AGFishes2410-38882020-06-015219010.3390/fishes5020019Population Genetic Analysis for Stock Enhancement of Silver Sea Bream (<i>Rhabdosargus</i> <i>sarba</i>) in TaiwanTe-Hua Hsu0Chang-Wen Huang1Hung-Tai Lee2Yi-Hsuan Kuo3Kwang-Ming Liu4Cheng-Hui Lin5Hong-Yi Gong6Department of Aquaculture, National Taiwan Ocean University, Keelung 20224, TaiwanDepartment of Aquaculture, National Taiwan Ocean University, Keelung 20224, TaiwanDepartment of Environmental Biology and Fisheries Science, National Taiwan Ocean University, Keelung 20224, TaiwanDepartment of Aquaculture, National Taiwan Ocean University, Keelung 20224, TaiwanInstitute of Marine Affairs and Resources Management, National Taiwan Ocean University, Keelung 20224, TaiwanDepartment of Aquaculture, National Taiwan Ocean University, Keelung 20224, TaiwanDepartment of Aquaculture, National Taiwan Ocean University, Keelung 20224, TaiwanStock enhancement is a method for replenishing depleted wild finfish populations by supplementing them with hatchery-raised fish. In Taiwan, silver sea bream (<i>Rhabdosargus sarba</i>) is a predominant commercial species involved in stock enhancement projects. Although management agencies conduct stock enhancement projects, there are a lot of private releases without records. Stock enhancement is performed by the private aquaculture sector without accurate genetic records, potentially leading to unintended consequences for wild populations. We analyzed the genetics of 459 wild and 701 hatchery-reared specimens from nine batches produced by various hatcheries. Wild and hatchery-reared samples could be considered two separate clades by using a set of stable and informative microsatellite markers including type I (from gene introns and 3′UTR) and type II markers (randomly picked up from genome). Type I microsatellite markers could more sensitively reflect the loss of genetic diversity more than type II markers in the domestication process. All specimens were considered native by using mtDNA <i>COI</i> and microsatellites. The genetic composition of the wild population is relatively simple, and the estimated low contribution rate of the hatchery stock (1.3–10.9%; 6–50/459) indicated a weak but significant genetic effect of stock enhancement. Therefore, establishing standards for the stock enhancement of silver sea bream for more effective supplementation of wild populations is imperative.https://www.mdpi.com/2410-3888/5/2/19stock enhancementmicrosatellitesgenetic diversitygenetic effectaquaculture |
| spellingShingle | Te-Hua Hsu Chang-Wen Huang Hung-Tai Lee Yi-Hsuan Kuo Kwang-Ming Liu Cheng-Hui Lin Hong-Yi Gong Population Genetic Analysis for Stock Enhancement of Silver Sea Bream (<i>Rhabdosargus</i> <i>sarba</i>) in Taiwan Fishes stock enhancement microsatellites genetic diversity genetic effect aquaculture |
| title | Population Genetic Analysis for Stock Enhancement of Silver Sea Bream (<i>Rhabdosargus</i> <i>sarba</i>) in Taiwan |
| title_full | Population Genetic Analysis for Stock Enhancement of Silver Sea Bream (<i>Rhabdosargus</i> <i>sarba</i>) in Taiwan |
| title_fullStr | Population Genetic Analysis for Stock Enhancement of Silver Sea Bream (<i>Rhabdosargus</i> <i>sarba</i>) in Taiwan |
| title_full_unstemmed | Population Genetic Analysis for Stock Enhancement of Silver Sea Bream (<i>Rhabdosargus</i> <i>sarba</i>) in Taiwan |
| title_short | Population Genetic Analysis for Stock Enhancement of Silver Sea Bream (<i>Rhabdosargus</i> <i>sarba</i>) in Taiwan |
| title_sort | population genetic analysis for stock enhancement of silver sea bream i rhabdosargus i i sarba i in taiwan |
| topic | stock enhancement microsatellites genetic diversity genetic effect aquaculture |
| url | https://www.mdpi.com/2410-3888/5/2/19 |
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