Population Structure and Phylogenetic Study of Common Dolphin（Delpinus sp.）in Taiwan Waters Based on Mitochondrial and Microsatellite DNA Markers

• Main Authors: Shuyi Yeh, 葉書宜
• Other Authors: Dr. Guo-Jing Weng
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/59177600601127154688

碩士 === 國立屏東科技大學 === 野生動物保育研究所 === 101 === Taiwan Waters are located between the tropical and subtropical Northwestern Pacific Ocean, containing shallow continental shelf and deep ocean. Upwelling and intersection of Kuroshio Current and China Coastal Current bring abundant fishes. Thus, both short-beaked common dolphin（Delphinus delphis）and long-beaked common dolphin Delphinus canpensis）likely coexist in Taiwan Waters. This research analyzed 703bp section of the mitochondrial DNA control region from 31 common dolphin from Taiwan Waters and found 27 short-beaked common dolphin, 3 long-beaked common dolphin and 1 spinner dolphin（Stenella longirostris）. The short-beaked common dolphins in Taiwan Waters are composed of a single population. The high haplotype diversity（h=0.994±0.012）and radiation of the haplotype minimum-spanning network imply large effective population size and population expansion. The FST values and minimum-spanning networks showed that genetic relationship between short-beaked common dolphin populations of Taiwan Waters and East Tropical Pacific Ocean was closer than the relationship between populations of the Taiwan Waters and Australian Waters. This result implied the genetic differentiation among short-beaked common dolphin populations was not correlated with geographic distance. The shortage of food caused by El Nino-Southern Oscillation and the favor by short-beaked common dolphin to migrate in cool waters in the North Pacific could possibly explain the results.