Department of Biological Sciences, University of Windsor, Windsor, Ontario N9B 3P4 Canada.
J Fish Biol. 2009 May;74(7):1450-61. doi: 10.1111/j.1095-8649.2009.02210.x.
A study was undertaken to examine secondary sexual characters (spawning colouration and overall body size) in relation to sperm metrics in one alternative reproductive tactic of coho salmon Oncorhynchus kisutch: large hooknose males that spawn in dominance-based hierarchies. Males with less intense red spawning colouration had higher sperm velocities than males with darker red spawning colouration. There was no relationship between male body size and sperm metrics. These results suggest that within an alternative reproductive tactic, variation in sperm competition intensity may select for a trade-off between investment in sexual colouration and sperm quality.
一项研究考察了银鲑 Oncorhynchus kisutch 中一种替代繁殖策略（繁殖颜色和整体体型）与精子指标的关系：在基于优势的等级制度中产卵的大型钩鼻雄鱼。红色繁殖色较弱的雄性的精子速度比红色繁殖色较深的雄性高。雄性体型与精子指标之间没有关系。这些结果表明，在替代繁殖策略中，精子竞争强度的变化可能会选择在性颜色投资和精子质量之间进行权衡。
