Population dynamics of meta-population and ineraction among local population

混合种群的种群动态和当地种群的不作用

• 批准号: 10640606
• 负责人: MAEKAWA Koji
• 金额: $ 2.18万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10640606/
• 关键词: meta-population; local population; genetic flow; extinction probability; Salmonidae; Dolly Varden charr; マイクロサテライトDNA; 遺伝的距離; 母川回帰; 局所個体群; 個体群動態

The concepts of extinction-(re) colonization dynamics applies to naturally or artificially fragmented populations. We investigated the effects of habitat size and isolation (distance to nearest occupied habitat) on the patterns of presence or absence (occurrence) of patchily distributed stream-dwelling Dolly Varden in individual tributaries. We predicted that the probability of occurrence would 1) increase with habitat size because of low extinction rates in large habitats and 2) decrease with increasing distance among habitats because of low recolonization rates in isolated habitats. Our first prediction was supported by a logistic regression of Dolly Varden occurrence on habitat size, indicating that small populations may be especially prone to extinction. Oppositely, distance to nearest population did not affect Dolly Varden occurrence. This suggests that colonization of unoccupied habitats was rare and independent of geographic distance, and that extinction rates may exceed recolonization rates. However, a previous genetic study revealed isolation by distance, a pattern inconsistent with the present results. This discrepancy may result from the limited available information on temporal fluctuations of occurrence and deserves further attention.

灭绝-（再）殖民动态的概念适用于自然或人工破碎的种群。我们调查了栖息地的大小和隔离（距离最近的居住栖息地）的存在或不存在（发生）的模式，在个别支流的斑块分布的流居住多莉瓦登的影响。我们预测，发生的概率将1）增加与栖息地的大小，因为在大的栖息地低灭绝率和2）减少与栖息地之间的距离增加，因为在孤立的栖息地低灭绝率。我们的第一个预测是支持的逻辑回归多莉瓦登发生栖息地的大小，表明小种群可能特别容易灭绝。相反，距离最近的人口没有影响多莉瓦登发生。这表明，无人居住的栖息地的殖民化是罕见的，独立的地理距离，灭绝率可能超过殖民化率。然而，以前的遗传研究显示，隔离的距离，模式与目前的结果不一致。这种差异可能是由于关于发生率时间波动的现有资料有限造成的，值得进一步注意。

项目成果

Koseki, Y, K.Takata, K.Maekawa: "The role of the male anal fin in the fertilization success in Medaka"Fisheries Science. 66. 633-635 (2000)

Koseki, Y, K.Takata, K.Maekawa：“雄性臀鳍在青鳉成功受精中的作用”渔业科学。

Katano, O, K.Maekawa and K.Iguchi: "An experimental study of interaction and feeding behaviour of ayu, Plecoglossus altivelis and Japanese dace, Tribolodon hakonensis"Fisheries Science. 65(1). 42-47 (1999)

Katano, O, K.Maekawa 和 K.Iguchi：“香鱼、Plecoglossus altivelis 和日本鲮鱼、Tribolodon hakonensis 相互作用和摄食行为的实验研究”渔业科学。

Katano,O,K.Maekawa,K,Iguchi: "An experimental study of interaction and feeding behaviour of ayu, and Japanese dase."Fisheries Science. 65(1). 42-47 (1999)

Katano,O,K.Maekawa,K,Iguchi：“香鱼和日本鲫鱼相互作用和摄食行为的实验研究。”渔业科学。

Tamate, T., K.Maekawa: "Interpopulation variation in reproductive traits of female masu salmon."Oikos. 90. 209-218 (2000)

Tamate, T., K.Maekawa：“雌性马苏鲑鱼生殖特征的种群间变异。”Oikos。

前川光司,中野繁,井口恵一朗: "環境変動と生物群集、温暖化による淡水魚類の分布変化、河野・井村編"海ゆう社. 280 (1999)

Koji Maekawa、Shigeru Nakano、Keiichiro Iguchi：“全球变暖导致的环境变化、生物群落和淡水鱼类分布的变化，河野和井村编辑”Umiyusha 280 (1999)。