Influence of dietary nutrient balance on aggression and signalling in male field crickets
Influence of dietary nutrient balance on aggression and signalling in male field crickets
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膳食营养平衡对雄性蟋蟀攻击性和信号传导的影响
DOI：
10.1016/j.anbehav.2017.10.006
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发表时间：
2017
期刊：
影响因子：
2.5
通讯作者：
S. Bertram
中科院分区：
文献类型：
--
作者：
S. J. Harrison;J. Godin;S. Bertram
性选择指标模型预测，性选择特征的阐述应与条件呈正相关。然而，营养可能会影响多种性状的表达，其中高质量饮食可能会导致性状正相关，而低质量饮食则可能导致权衡。尽管之前的研究已经研究了饮食数量或单一营养素（例如蛋白质、碳水化合物和磷）如何影响性特征，但很少有人研究饮食营养平衡如何影响性特征表达。因此，我们研究了膳食蛋白质：碳水化合物的比例和磷的百分比如何影响对配偶吸引信号的投入与攻击性之间的关系。我们与六只成年雄性蟋蟀进行了战斗，每只都吃着独特的饮食，同时记录了它们战斗前和战斗后的信号参数。我们没有发现任何证据表明饮食会影响攻击性或战前信号，但高磷饮食对几个信号努力参数有负面影响。体型是攻击行为和大多数信号参数的重要预测因素，这表明发育饮食可能对这些性特征有更大的影响。一些战前信号参数与攻击性关系较弱，这表明信号可能会宣传竞争能力。摄入高碳水化合物和等量蛋白质：碳水化合物饮食的男性信号参数发生了变化，与摄入高蛋白饮食的男性相比，这表明在激烈的比赛后信号传导努力总体增加，这表明饮食对信号传导的影响可能只有在高强度活动后才变得明显。攻击性竞赛后信号的变化也与饮食中磷含量调节的攻击性水平有关，因此只有食用低磷饮食的雄性在大量攻击性行为后才能够在信号传导上大量投入。我们的研究结果强调了研究多种性选择特征之间相互作用的重要性，以及饮食营养平衡如何影响这些关系。
Indicator models of sexual selection predict that sexually selected trait elaboration should covary positively with condition. However, nutrition might influence the expression of multiple traits, where high-quality diets may result in positive trait correlations and low-quality diets in trade-offs. Although previous studies have examined how diet quantity or single nutrients, such as protein, carbohydrate and phosphorus, influence sexual traits, few have examined how dietary nutrient balance affects sexual trait expression. We therefore investigated how dietary protein:carbohydrate ratio and percentage of phosphorus influence the relationship between investment in mate attraction signalling and aggression. We fought groups of six adult maleGryllusveletiscrickets, each consuming a unique diet, while recording their prefight and postfight signalling parameters. We found no evidence that diet influenced aggression or prefight signalling, with the exception that high-phosphorus diets had a negative influence on several signalling effort parameters. Body size was an important predictor of aggressive behaviour and most signalling parameters, suggesting that developmental diet may have a greater influence on these sexual traits. Several prefight signalling parameters were weakly related to aggression, suggesting that signalling may advertise competitive abilities. Males consuming high-carbohydrate and equal protein:carbohydrate diets experienced changes in signalling parameters that represented an overall increase in signalling effort following aggressive contests compared to males consuming high-protein diets, suggesting that dietary effects on signalling may only become apparent following periods of highly energetic activity. Changes in signalling following aggressive contests were also related to aggression levels modulated by dietary phosphorus content, such that only males consuming low-phosphorus diets were able to invest heavily in signalling after investing heavily in aggression. Our findings highlight the importance of research on the interplay between multiple sexually selected traits, and how dietary nutrient balance influences these relationships.
影响因子：
6.6
作者：
Nakagawa, Shinichi;Schielzeth, Holger
通讯作者：
Schielzeth, Holger