Sperm traits dependent on body size in masu salmon Oncorhynchus masou.
Sperm traits dependent on body size in masu salmon Oncorhynchus masou.
复制标题
马苏鲑鱼 Oncorhynchus masou 的精子性状取决于体型大小。
DOI：
10.1007/s12562-015-0899-y
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发表时间：
2015
影响因子：
1.9
通讯作者：
S.
中科院分区：
文献类型：
--
作者：
Yamamoto;T.;Maruta;H.;Suzuki;T. and Kitanishi;S.
大多数关于鲑鱼精子特征（精子浓度、游泳速度和寿命）的比较研究涉及具有不同生活史的雄性（溯河与留河），它们表现出不同的生殖策略。然而，在同一生活史中，雄性表现出一种统治等级，在这种等级中，体型较小的雄性往往地位较低。这一现象促使我们对masu oncorhynchus masou的大雄性和小雄性的精子特征进行比较，并确定这两个生活史群体中大小依赖的精子特征。我们检测到两组之间的精子浓度有显著差异，居住雄性的精子浓度高于雄性。对于居住的男性，我们发现身体大小和精子游泳速度之间存在显著的负相关，即精子速度越快，身体大小越小。这些发现支持了早期的数据，并表明较小或较年轻的雄性利用更多的能量来产生高浓度和高速的精子。
Most comparative studies on the sperm traits (sperm concentration, swimming speed, and longevity) of salmonid fish involve males with alternative life histories (anadromous versus resident forms) that exhibit different reproductive strategies. However, males exhibit a dominance hierarchy within the same life history, in which smaller males have a tendency to be lower rank. This phenomenon prompted us to compare the sperm traits of large anadromous and small resident males in masu salmonOncorhynchus masou, and to identify the size-dependent sperm traits within these two life history groups. We detected a significant difference in sperm concentration between the two groups, with resident males having higher sperm concentrations than anadromous males. For resident males, we detected a significantly negative correlation between body size and sperm swimming speed, i.e., faster sperm speed was associated with smaller body size. These findings support earlier data and suggest that smaller or younger males utilize more energy to produce high concentration and high speed sperms.