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在塑造两种的发育表现方面,温度超过了饮食,通过增长延迟和生理限制来决定其发育表现
Émile Vadboncoeur1, Marie-Hélène Deschamps2, Susan M Bertram1
1Department of Biology, Carleton University, Ottawa, ON, Canada, K1S 5B6.
The Journal of experimental biology
|November 7, 2025
概括
温度显著影响的发展,而不是饮食. 最佳性能发生在35°C,极端会对生长和生存产生负面影响,突出温度.
科学领域:
- 发育生物学是发展生物学.
- 环境科学环境科学
- 生态生态学 生态生态学
背景情况:
- 慢性环境压力因素极大地影响动物的发育,影响生态预测和人工养系统.
- 虽然已知温度和营养会影响生命史的特征,但它们对发育表现的相对贡献仍然不清楚.
- 短期耐受性测试无法捕捉累积压力对发育的影响.
研究的目的:
- 调查恒温和食蛋白与碳水化合物 (P:C) 比率对发展的独立和联合影响.
- 量化温度与饮食对两种的发育表现的相对影响.
- 建立一个综合性框架,用于评估动物发育过程中的环境敏感性和性能极限.
主要方法:
- 两种,Acheta domesticus和Gryllodes sigillatus,在恒定的温度 (26-41°C) 和不同的食P:C比率 (0.15-2.18) 下养.
- 增长轨迹是使用统一的后勤方程来建模的,以估计非对称质量和最大增长率.
- 使用综合度量来评估发育表现,该度量包括非对称质量,发育速率和生存率.
主要成果:
- 发育性能在35°C达到顶峰,在极端的热量下降,这是由于发育延迟 (寒冷) 或减少质量/生存 (热量) 的原因.
- 饮食P:C比率的影响较小,表现在大多数比率上保持稳定,只有在极端失衡时才会下降.
- 极端饮食失衡的性能成本相当于4-5°C偏离热最佳值.
结论:
- 温度是发育表现的更重要的驱动因素,而不是在任意养条件下的饮食.
- 该研究为量化环境敏感性和确定发展中生物体的性能极限提供了一个强大的框架.
- 结果提供了对环境限制和动物发展潜在的性能权衡背后的机制的见解.
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