Geographic variation in the molecular, morphological and reproductive characters of the ayuPlecoglossus altivelis (plecoglossidae) in the Japan-Ryukyu Archipelago
Geographic variation in the molecular, morphological and reproductive characters of the ayuPlecoglossus altivelis (plecoglossidae) in the Japan-Ryukyu Archipelago
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日本-琉球群岛香鱼Plecoglossus altivelis (plecoglossidae)分子、形态和繁殖特征的地理变异
DOI：
10.1007/bf02904160
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发表时间：
1986
期刊：
影响因子：
--
通讯作者：
M. Nishida
中科院分区：
文献类型：
--
作者：
M. Nishida
为了阐明香鱼的地理变异，研究了日本-琉球群岛不同地区香鱼种群的分子、形态和生殖特征。对18-28个位点编码的酶进行电泳分析，并对12个体节性状和17个形态性状进行单变量和多变量分析，结果表明，该群岛的香鱼有两个不同的类群：日本群岛的香鱼和琉球群岛的香鱼。在日本群岛组，内陆人口的琵琶湖被发现偏离一些从其他amphirromous人口的遗传和形态。琵琶湖人口被认为是迄今为止最多产的，从北南渐变的繁殖力观察到的amphidromous人口。虽然没有虚拟的分歧，观察在日本群岛的amphirmous种群的分子数据，这些种群之间的分歧是相当大的形态和生殖力数据。地理变异模式的差异归因于分子和生物特征固有的质的差异：生物特征对选择做出反应，并且部分地直接受到环境影响的改变，但分子特征几乎不是这样。不同香鱼地理种群的不同性状的进化可能以不同的速度进行。
In an attempt to clarify geographic variation in the ayuPlecoglossus altivelis, the molecular, morphological and reproductive characters of populations from various localities in the Japan-Ryukyu Archipelago were examined. An electrophoretic analysis of enzymes encoded by 18–28 loci and univariate and multivariate analyses of 12 meristic and 17 morphometric characters indicated that there are two distinct groups of ayu in the archipelago: that of the Japan Islands and that of the Ryukyu Islands. Within the Japan Islands group, a landlocked population of Lake Biwa was found to diverge somewhat from other amphidromous populations genetically and morphologically. The Lake Biwa population was noted as being by far the most fecund, departing from a north-south cline of fecundity observed in amphidromous populations. Though no virtual divergence was observed among amphidromous populations in the Japan Islands in molecular data, divergence among these populations was considerable in morphological and fecundity data. Differences in geographic variation patterns are attributed to qualitative differences inherent in molecular and organismal characters: organismal characters are responsive to selection and also directly altered by environmental influences in part but molecular characters are hardly so. The evolution of different characters may have proceeded at different rates among geographic populations of ayu.