Rahman Md Moshiur, Gasparini Clelia, Turchini Giovanni M, Evans Jonathan P
Centre for Evolutionary Biology, School of Animal Biology, University of Western Australia, Crawley, 6009 Western Australia, Australia.
School of Life and Environmental Sciences, Faculty of Science, Engineering and Built Environment, Deakin University, Warrnambool, Victoria 3280, Australia.
Biol Lett. 2014 Sep;10(9). doi: 10.1098/rsbl.2014.0623.
The health benefits of diets containing rich sources of long-chain omega-3 polyunsaturated fatty acids (n-3 LC-PUFA) are well documented and include reductions in the risk of several diseases typical of Western societies. The dietary intake of n-3 LC-PUFA has also been linked to fertility, and there is abundant evidence that a range of ejaculate traits linked to fertility in humans, livestock and other animals depend on an adequate intake of n-3 LC-PUFA from dietary sources. However, relatively few studies have explored how n-3 LC-PUFA influence reproductive fitness, particularly in the context of sexual selection. Here, we show that experimental reduction in the level of n-3 LC-PUFA in the diet of guppies (Poecilia reticulata) depresses a male's share of paternity when sperm compete for fertilization, confirming that the currently observed trend for reduced n-3 LC-PUFA in western diets has important implications for individual reproductive fitness.
富含长链ω-3多不饱和脂肪酸（n-3 LC-PUFA）的饮食对健康有益，这已得到充分证明，其益处包括降低西方社会常见的几种疾病的风险。n-3 LC-PUFA的饮食摄入量也与生育能力有关，并且有大量证据表明，人类、家畜和其他动物中一系列与生育能力相关的射精特征取决于从饮食中充分摄入n-3 LC-PUFA。然而，相对较少的研究探讨了n-3 LC-PUFA如何影响生殖适应性，特别是在性选择的背景下。在这里，我们表明，在孔雀鱼（Poecilia reticulata）的饮食中实验性降低n-3 LC-PUFA的水平，会在精子竞争受精时压低雄性的父权份额，这证实了目前西方饮食中n-3 LC-PUFA减少的趋势对个体生殖适应性具有重要影响。
