查詢結果分析
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頁籤選單縮合
題 名 | Spatial and Temporal Population Genetic Structure of the Giant Mottled Eel Anguilla marmorata in the Northwestern Pacific=西北太平洋鱸鰻族群遺傳結構之時空分析 |
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作 者 | 鄭志成; 沈康寧; 曾萬年; | 書刊名 | 臺灣水產學會刊 |
卷 期 | 39:4 2012.12[民101.12] |
頁 次 | 頁269-282 |
分類號 | 387.1015 |
關鍵詞 | 鰻線; 呂宋鰻; 微衛星DNA; 遺傳多樣性; 黑潮; Elver; Anguilla luzonensis; Microsatellite DNA; Genetic variability; Kuroshio; |
語 文 | 英文(English) |
中文摘要 | 鱸鰻為河海洄游性魚類,在淡水中成長,卻在海中產卵,廣泛分佈於印度太平洋及太平洋地區。生活於西北太平洋的日本鰻族群已發現並無時空上的遺傳分化,但在同一洋流系統輸送下的鱸鰻族群是否會有空間或時間上的遺傳分化情形則不清楚。本研究以五個微衛星DNA基因座分析了柳葉鰻漂送過程中必經的菲律賓、臺灣及日本三地的223條鱸鰻鰻線的遺傳變異性及族群遺傳結構。為了必免鰻線階段會有和鱸鰻外型相似的呂宋鰻混入,所有的樣本都經過種專一性粒線體DNA細胞色素b基因的聚合酉每 擴增篩撿。結果顯示所有樣本均為鱸鰻,而且西北太平洋的鱸鰻並無族群分化的現象,(FST = 0.002, P > 0.05)。即使是已經相隔10年的日本樣本。以Hierarchical AMOVA分析結果也顯示台灣秀姑巒溪不同季節間鱸鰻族群的分化程度也不顯著 (FST = 0.003, P > 0.05)。此結果顯示西北太平洋的鱸鰻族群遺傳結構不論是在空間或時間上都相對的穩定。鱸鰻柳葉鰻漂游期間的逢機擴散及熱帶鰻終年產卵的特性可能是抑制鱸鰻族群分化的主因。 |
英文摘要 | The giant mottled eel Anguilla marmorata is a diadromous fish that grows in the freshwater and spawns in the ocean. This freshwater eel species is widely distributed in the Indo-Pacific and western Pacific Oceans. The population of A. japonica in the northwestern Pacific has shown no spatial and temporal genetic structure while that of A. marmorata, which is also transported by the same current system, is still unclear. In this study, 5 microsatellite loci were used to analyze the genetic variability and the population genetic structure of 223 A. marmorata elvers collected from the Philippines, Taiwan and Japan. In order to eliminate the probability of species admixture with A. luzonensis in the samples due to their morphological resemblance during elver stage, all of the specimens were screened using species-specific mtDNA cytochrome b PCR. The results showed that our samples was comprised of just a single species, A. marmorata and its population in the western Pacific do not have any significant genetic differentiation (FST = 0.002; P > 0.05), even if the Japanese specimens were collected 10 years ago. Hierarchical AMOVA also suggested that the population genetic structure among seasons in Taiwan was not significant (FST = 0.003; P > 0.05). This study indicated that the population genetic structure of A. marmorata in the western Pacific is stable in both spatial and temporal scales. The random dispersal of their leptocephalus and their year round spawning behavior might inhibit the population differentiation. |
本系統中英文摘要資訊取自各篇刊載內容。