Marine Resources Research Institute, South Carolina Department of Natural Resources, Hollings Marine Lab, 331 Fort Johnson Road, Charleston, SC 29412, U.S.A.
J Fish Biol. 2014 Aug;85(2):374-93. doi: 10.1111/jfb.12419. Epub 2014 May 28.
Analyses of the genetic population structure of spotted seatrout Cynoscion nebulosus along the south-eastern U.S. coast using 13 microsatellites suggest significant population differentiation between fish in North Carolina (NC) compared with South Carolina (SC) and Georgia (GA), with New River, NC, serving as an area of integration between northern and southern C. nebulosus. Although there is a significant break in gene flow between these areas, the overall pattern throughout the sampling range represents a gradient in genetic diversification with the degree of geographic separation. Latitudinal distance and estuarine density appear to be main drivers in the genetic differentiation of C. nebulosus along the south-eastern U.S. coast. The isolation-by-distance gene-flow pattern creates fine-scale differences in the genetic composition of proximal estuaries and dictates that stocking must be confined to within 100 km of the location of broodstock collection in order to maintain the natural gradient of genetic variation along the south-eastern U.S. coast.
利用 13 个微卫星对美国东南沿海斑点石首鱼的遗传种群结构进行分析，结果表明，北卡罗来纳州（NC）的鱼与南卡罗来纳州（SC）和佐治亚州（GA）的鱼存在显著的种群分化，北卡罗来纳州的新河是北方和南方斑点石首鱼融合的区域。尽管这些地区之间的基因流动存在显著的中断，但整个采样范围内的总体模式代表了遗传多样化程度与地理分离程度的梯度。纬度距离和河口密度似乎是东南美国沿海斑点石首鱼遗传分化的主要驱动因素。距离隔离导致基因流动的模式造成了近岸河口遗传组成的细微差异，并决定了为了保持东南美国沿海的遗传变异自然梯度，放流必须局限在亲鱼采集地点的 100 公里以内。
