Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Ave, Windsor, Ontario N9B 3P4, Canada.
J Fish Biol. 2009 May;74(8):1804-15. doi: 10.1111/j.1095-8649.2009.02256.x.
Genetic divergence, assortative courtship and intermale aggression were assessed between sympatric colour morphs of the sailfin silverside Telmatherina antoniae, endemic to Lake Matano, Indonesia. Genetic analysis using microsatellite markers showed no barriers to gene flow among T. antoniae primary colour morphs (blue and yellow) within sampling sites, sympatric populations or at the lake-wide level. Low but significant genetic differentiation was found between yellow morphs and mixed (blue-yellow) morphs. Behavioural surveys indicated assortative courtship does occur along primary colour lines; however, intermale aggression among paired and intruding male morphs appeared equal with respect to male colour. These observations support the hypothesis that males view other males as threats to their courtship regardless of their colour. This study supports recent work suggesting that assortative mating is present in T. antoniae despite a lack of reproductive isolation among colour morphs.
遗传分歧、选配交配和雄性间攻击在印度尼西亚马塔诺湖特有的帆鳍银汉鱼的同域色型之间进行了评估。使用微卫星标记的遗传分析表明，在采样地点、同域种群或整个湖泊水平上，T. antoniae 主要色型（蓝色和黄色）之间没有基因流动的障碍。黄色色型和混合（蓝-黄）色型之间存在低但显著的遗传分化。行为调查表明，选配交配确实沿着主要颜色线发生；然而，配对和入侵雄性色型之间的雄性间攻击似乎与雄性颜色无关。这些观察结果支持这样的假设，即雄性将其他雄性视为对其求偶的威胁，而不管它们的颜色如何。这项研究支持了最近的研究结果，表明尽管 T. antoniae 不同色型之间没有生殖隔离，但仍存在选配交配。
