頁籤選單縮合
| 題 名 | Spatial Genetic Structure of the Surf Clam Paphia undulata in Thailand Waters |
|---|---|
| 作 者 | Donrung, Patipon; Tunkijjanukij, Suriyan; Jarayabhand, Padermsak; Poompuang, Supawadee; | 書刊名 | Zoological Studies |
| 卷 期 | 50:2 2011.03[民100.03] |
| 頁 次 | 頁211-219 |
| 分類號 | 386.793 |
| 關鍵詞 | Paphia undulata; Genetic diversity; ISSR; Population genetics; Population structure; |
| 語 文 | 英文(English) |
| 英文摘要 | The surf clam Paphia undulata has supported an offshore fishery in Thailand since the 1970s. However, most fishing sites have experienced declines in production over the past 2 decades. Overexploitation and low levels of genetic variation of surf clam populations may be responsible for the low productivity of the species. Inter-simple sequence repeat (ISSR) markers were used to assess the genetic diversity of surf clams sampled from 4 fishing areas in the Gulf of Thailand and 1 location in the Andaman Sea. In total, 300 ISSR loci were analyzed in 500 individuals. Three neighboring populations (SG, SS, and SP) in the upper Gulf of Thailand exhibited moderate genetic variation and similar Nei's gene diversity (H(subscript j)) values of 0.12-0.14, while populations from the lower Gulf of Thailand (SR) and the Andaman Sea (ST) had relatively low genetic variability with respective H(subscript j) values of 0.053 and 0.047. Different analyses, including F(subscript ST), AMOVA, phylogenetic networks, and an assignment test revealed high levels of population substructuring, implying that gene flow may occur between stocks in the upper Gulf of Thailand, whereas the SR and ST populations were more geographically isolated. The relatively low amount of genetic diversity of the SR and ST stocks may reduce their ability to survive in a changing environment. Reductions of fishing efforts, and initiation of restocking programs and aquaculture development of this species should be considered to maintain the sustainability of the surf clam fishery. |
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