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ウォレス線周辺における海洋生物4種の集団遺伝構造の比較研究
http://hdl.handle.net/20.500.12000/0002019588
http://hdl.handle.net/20.500.12000/00020195882345ef4d-9896-45bf-a005-59cf108ba7e9
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rikoken425abstract.pdf (1.3 MB)
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rikoken425review.pdf (2.8 MB)
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rikoken425dijest.pdf (1.7 MB)
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Item type | 琉球大学リポジトリ登録用アイテムタイプ(1) | |||||||
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公開日 | 2023-01-10 | |||||||
タイトル | ||||||||
タイトル | ウォレス線周辺における海洋生物4種の集団遺伝構造の比較研究 | |||||||
言語 | ja | |||||||
タイトル | ||||||||
タイトル | Studies on comparative genetic population structure of four marine or ganisms across the biogeographical barrier, the Wallace Line | |||||||
言語 | en | |||||||
作成者 |
Hardianto, Eko
× Hardianto, Eko
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アクセス権 | ||||||||
アクセス権 | open access | |||||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||
内容記述 | ||||||||
内容記述タイプ | Abstract | |||||||
内容記述 | The targeted species in this study are the fiddler crab Austruca perplexa, the shallow water shrimp Acetes sibogae sibogae, the Javanese ricefish Oryziasjavanicus, and the Asian monsoon scallops Amusium pleuronectes has long been of interest to evolutionary biologist because of the high level of species diversity, its wide geographic distribution, and its economic and ecologically importance. Many of these pressures, including increasing sea-surface temperatures, ocean acidification, pollution, legal and illegal overfishing, destructive fishing methods, water diversions, and other environmental shifts have the potential to result in significant loss of specific biodiversity stock, necessitating careful management wherever possible. Genetic approaches are one tool that can help inform the conservation and management objectives unique to marine systems. Population genetic tools offer an opportunity to elucidate the genetic level (speciation and diversification), patterns of dispersal (connectivity and migration), and demographics (past and present), to better understand species' responses to ecological changes, anthropogenic stressors, and biogeographical We compare the patterns of genetic diversity and natural population structure in the target species were investigated to gain a better understanding.of its evolutionary history. Samples were collected from Western Pacific Region, especially across the biogeographical barrier, the Wallace line. We characterized sequence variation in an mtDNA control region fragment for all targeted species and microsatellite loci for O. javanicus. The genetic diversity result showed the height haplotype diversity and low nucleotide diversity (for Au. perplexa and Am. pleuronectes), intermediate haplotype diversity and low nucleotide diversity (for Ac. s. sibogae), and both low haplotype and nucleotide diversity (for O. javanicus). Analysis of molecular variance revealed significant genetic differentiation (P < 0.0001) among all sampled sites for both genetic markers accept Am. pleuronectes. Furthermore, the mean fixation indices for both genetic markers were relatively high, indicating that dispersal potential among sites was low and that gene flow had been restricted in the past. This pattern of population structure likely reflects a short pelagic larval life and is associated with very limited dispersal potential, leading to isolation by distance, potentially allowing local adaptation to sites that augment any oceanographic, geographic, or biological barriers to gene flow. The patterns of genetic differentiation resulting from this combination of factors represent a source of evolutionary novelty. |
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言語 | en | |||||||
出版者 | ||||||||
言語 | ja | |||||||
出版者 | 琉球大学 | |||||||
出版者 | ||||||||
言語 | en | |||||||
出版者 | University of the Ryukyus | |||||||
言語 | ||||||||
言語 | eng | |||||||
資源タイプ | ||||||||
資源タイプ | doctoral thesis | |||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_db06 | |||||||
出版タイプ | ||||||||
出版タイプ | VoR | |||||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||
学位授与番号 | ||||||||
学位授与番号 | 甲第425号 | |||||||
学位名 | ||||||||
学位名 | 博士(学術) | |||||||
言語 | ja | |||||||
学位授与年月日 | ||||||||
学位授与年月日 | 2022-09-22 | |||||||
学位授与機関 | ||||||||
学位授与機関識別子 | 18001 | |||||||
学位授与機関識別子Scheme | kakenhi | |||||||
学位授与機関名 | 琉球大学 | |||||||
言語 | ja | |||||||
学位授与機関名 | University of the Ryukyus | |||||||
言語 | en |