Macronutrients and micronutrients drive trade-offs between male pre- and postmating sexual traits
Macronutrients and micronutrients drive trade-offs between male pre- and postmating sexual traits
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DOI：
10.1111/1365-2435.13190
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发表时间：
2018-10-01
影响因子：
5.2
通讯作者：
Simmons, Leigh W.
中科院分区：
文献类型：
--
作者：
Ng, Soon Hwee;Simpson, Stephen J.;Simmons, Leigh W.
1.营养从根本上影响寿命和繁殖，并确定营养摄入量如何与这些生活史特征的表达可以促进对生活史权衡机制的理解。男性被认为面临着资源分配之间的权衡，以交配前的第二性征获得女性和分配交配后的特征，如射精质量，影响他们的生育能力。我们使用营养的几何框架来研究大量营养素和微量营养素消耗对雄性大田蟋蟀寿命以及交配前后性特征表达的影响.我们发现，寿命最大化的饮食与低蛋白质-碳水化合物（P：C）的比例，而交配前的性特征（求偶歌和表皮碳氢化合物）最大化的高P：C的比例。相比之下，精子活力，交配后的性状，是最低的高磷：碳比的饮食。微量营养素（矿物质和维生素）的高消耗与寿命缩短和较低的长链CHC相对丰度相关，但提高了精子活力和求偶歌曲的表现.我们发现，不同的常量营养素不仅仅是分配给不同性状的卡路里，而是直接决定不同生活史性状的表达，并调解它们的权衡。在这项研究中，我们还提供了证据表明，微量营养素影响的生活史性状的表达，强调包括微量营养素在实验中使用营养几何的价值。
1. Nutrition fundamentally affects life span and reproduction, and identifying how nutrient intakes are linked to the expression of these life-history traits can advance understanding of the mechanisms underlying life-history trade-offs. Males are thought to face trade-offs between the allocation of resources to premating secondary sexual traits for gaining access to females and allocation to postmating traits such as ejaculate quality that affects their fertility.2. We used the Geometric Framework for nutrition to examine the effects of macronutrient and micronutrient consumption on life span and the expression of pre- and postmating sexual traits in male field crickets Teleogryllus oceanicus.3. We found that life span was maximized on diets with a low protein-to-carbohydrate (P:C) ratio, whereas premating sexual traits (courtship song and cuticular hydrocarbons) were maximized on high P:C ratios. In contrast, sperm viability, a postmating trait, was lowest on high-P:C-ratio diets.4. Higher consumption of micronutrients (minerals and vitamins) was associated with decreased life span and lower relative abundances of longer chained CHCs, but improved the performance of sperm viability and courtship song.5. We show that different macronutrients are not simply calories to be allocated to different traits, but directly determine the expression of different life-history traits and mediate their trade-offs. In this study, we also provide evidence that micronutrients influenced the expression of life-history traits, emphasizing the value of including micronutrients in experiments using nutritional geometry.