世界上最大的半产卵哺乳动物(Dasyurus hallucatus)一生中的性别特异性表现、权衡和性状可重复性。

IF 2.8 2区 生物学 Q2 BIOLOGY
Journal of Experimental Biology Pub Date : 2025-04-01 Epub Date: 2025-04-07 DOI:10.1242/jeb.249969
Gabriella R Sparkes, Jaime Heiniger, Nicholas M A Smith, Vincent Careau, Ami F Amir Abdul Nasir, Skye F Cameron, Robbie S Wilson
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引用次数: 0

摘要

动物的生存和繁殖成功取决于它们的身体表现。然而,表现是一种复杂的特征,生物体每次进行一项活动时都必须平衡多种潜在因素的竞争需求。例如,增加咬合力(即增加头部大小)的形态——提高战斗能力——应该通过增加身体质量来限制短跑成绩。因此,在两性二态性存在的地方,或者在具有极端繁殖策略的动物中,战斗和逃跑行为之间的权衡可能是性别特有的。北袋鼬(Dasyurus hallucatus)是一种两性二态有袋类动物,具有性别特异性的生活史策略;雄性在一个同步繁殖季节后死亡,而雌性存活和繁殖2-3年。我们调查了性别和生活史对整个动物性能的影响,并评估了短跑速度和咬合力是否在雄性和雌性鼬个体之间或个体内相互权衡。我们使用了一个跨越三年的重复测量数据集。我们发现了显著的性别差异形态和性能,特别是在繁殖后,雄性冲刺速度下降,而雌性咬合力增加。体型和身体状况都是表现的有力预测指标。然而,我们没有发现冲刺速度和咬合力之间的权衡,这表明与生存和繁殖有关的生态任务——战斗能力和逃跑能力——可能在雄性和雌性北方袋鼬身上独立进化。最后,我们评估了形态和生产性能特征的可重复性,并证明了研究设计在量化动物生产性能差异时的重要性,特别是对于具有复杂生活史的动物。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Sex-specific performance, trade-offs and trait repeatability across the lifetime of the world's largest semelparous mammal (Dasyurus hallucatus).

The activities that define survival and reproductive success in animals depend on their physical performance. However, performance is a complex trait, and organisms must balance competing demands of multiple underlying factors every time they undertake an activity. For example, the morphology that increases bite force (i.e. increased head size) - improving fighting ability - should constrain sprinting performance by adding mass to the body. Consequently, trade-offs between fighting and escape performance might be sex specific where sexual dimorphism is present, or pronounced in animals with extreme breeding strategies. Northern quolls (Dasyurus hallucatus) are a sexually dimorphic marsupial, with sex-specific life history strategies; males die after a single synchronous breeding season, while females can live and breed for 2-3 years. We investigated the effects of sex and life history on whole-animal performance and assessed whether sprint speed and bite force trade off among or within individual male and female quolls. We used a repeated measures dataset spanning 3 years. We identified significant sex differences in morphology and performance, notably after breeding, where male sprint speed decreases but female bite force increases. Both body size and body condition were strong predictors of performance. However, we found no trade-off between sprint speed and bite force, suggesting that ecologically relevant tasks for survival and reproduction - fighting capacity and escape ability - may evolve independently in both male and female northern quolls. Finally, we assessed the repeatability of morphological and performance traits and demonstrated the importance of study design when quantifying variance in animal performance, especially for animals with complex life histories.

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来源期刊
CiteScore
5.50
自引率
10.70%
发文量
494
审稿时长
1 months
期刊介绍: Journal of Experimental Biology is the leading primary research journal in comparative physiology and publishes papers on the form and function of living organisms at all levels of biological organisation, from the molecular and subcellular to the integrated whole animal.
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