Iteroparity in complex mating systems of steelhead Oncorhynchus mykiss (Walbaum)
Iteroparity in complex mating systems of steelhead Oncorhynchus mykiss (Walbaum)
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硬头虹鳟 (Walbaum) 复杂交配系统中的迭代性
DOI：
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
M. Powell
中科院分区：
文献类型：
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作者：
S. Narum;D. Hatch;A. Talbot;P. Moran;M. Powell
研究了虹鳟复杂交配系统中不同的繁殖类型。产卵后steelhead（kelts）进行了采样，试图在下游迁移的花岗岩大坝下蛇河，美国多位点微卫星基因型（14个位点）被用来分配未知的起源，kelt个体上游种群的起源。结果表明，iteroparity是一个生活史特征，仍然在蛇河流域的几个支流，尽管强大的选择对下游成人通道，因为水电大坝。然而，蛇河中最大的虹鳟种群在凯尔特虹鳟混合物中的代表性较弱（清水河和鲑鱼河分别为7.5%和9.4%），相对于大龙德河（18.2%）、伊姆纳哈河（17.4%）、帕西梅罗伊孵化场（25.2%）和阿索廷河（22.2%）。群体逃逸大小与幼仔比例之间缺乏相关性（P > 0.05），表明群体间的产次差异不一致，但与个体大小呈显著负相关（P <0.05）。Iteroparity可能是一个有价值的来源，遗传变异和保护的优先事项，特别是在几年与穷人的招聘或在最近adecked人口。
This study investigated diverse reproductive types in complex mating systems of steelhead Oncorhynchus mykiss. Postspawned steelhead (kelts) were sampled during attempted downstream migration over Lower Granite Dam on the Snake River, U.S.A. Multilocus microsatellite genotypes (14 loci) were used to assign unknown origin, kelt individuals to upstream populations of origin. Results indicated that iteroparity is a life-history trait that remains in several tributaries of the Snake River basin despite strong selection against downstream adult passage because of hydroelectric dams. The largest populations of steelhead in the Snake River, however, were only weakly represented (Clearwater River = 7·5% and Salmon River = 9·4%, respectively) in the kelt steelhead mixture relative to the Grande Ronde River (18·2%), Imnaha River (17·4%), Pahsimeroi Hatchery (25·2%) and Asotin Creek (22·2%). A lack of correlation between population escapement size and kelt proportions (P > 0·05) suggests that iteroparity was not uniformly expressed across populations, but was significantly negatively correlated with body size (P < 0·05). Iteroparity may be a valuable source of genetic variability and a conservation priority, especially in years with poor recruitment or in recently bottlenecked populations.
银鲑鱼 (Oncorhynchus kisutch) 胰岛素的表征。
影响因子：
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作者：
Plisetskaya,E;Pollock,HG;Rouse,JB;Hamilton,JW;Kimmel,JR;Gorbman,A
通讯作者：
Gorbman,A
DOI：
10.1073/pnas.94.17.9197
发表时间：
1997-08-19
影响因子：
11.1
作者：
Rannala, B;Mountain, JL
通讯作者：
Mountain, JL