在变化的环境下进行繁殖的资源分配的驱动因素在投注对冲交易中
Daniel Oro1, Cassidy Waldrep1,2,3, Albert Bertolero4
1Centre d'Estudis Avançats de Blanes - CEAB (CSIC) Blanes Spain.
Ecology and evolution
|September 11, 2023
概括
奥杜安海根据食物的可用性和年龄来调整蛋大小和离合组合. 这种投注对冲策略优化了能源分配,以提高在可变环境中的适应性.
科学领域:
- 进化生物学是进化的生物学.
- 行为生态学 行为生态学
- 鸟类学 鸟类学是一门学科.
背景情况:
- 生命史理论预测了生存-繁殖的权衡,长寿物种的成年生存率更高,导致可变的育种投资.
- 了解生物如何在波动的环境中适应繁殖策略,如离合组合,对于进化成功至关重要.
研究的目的:
- 为了研究奥德温海 (Larus audouinii) 如何通过对应环境变化的离合器和蛋大小调整来分配能量.
- 分析食物供应和育种者年龄对离合体大小,卵体积和离合体内卵体积变化的影响.
主要方法:
- 分析了27年的数据,其中包括2847只已知年龄的奥杜安海.
- 统计检查离合体大小,总卵体积,以及与食物可用性和育种年龄有关的卵子大小不对称性.
主要成果:
- 食物的可用性和育种者的年龄都显著影响了离合体大小和总蛋量.
- 观察到一种相互作用效应:年轻的育种者的两卵离合体与食物的尺寸变化较小,离合体尺寸模式在恶劣条件下随年龄而变化.
- 雌性通过产放更大的第一蛋,增加了更多食物的投资,同时为后续的蛋节约了资源;年长的雌性表现出卵子大小不对称性增加,食物可用性更高.
结论:
- 阿杜温海采用灵活的投注对冲策略,根据食物和年龄调整蛋分配,以优化在可变环境中的适应性.
- 食物的可用性会影响整体的能量分配,而年龄会影响投资的资源量,但不会影响离合器内的分配模式.
- 蛋大小概况表明,可能会从三蛋转变为两蛋,并逐渐减少第三个蛋的大小.
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