热性能曲线的有氧范围和特定的动态动作在一个性二形鱼类动物:影响气候变暖的气候的影响
Christian J Bihun1, Erin M C Stewart1, Emily R Lechner1
1Environmental and Life Sciences Graduate Program, Trent University, Peterborough, ON, Canada, K9L 0G2.
The Journal of experimental biology
|June 17, 2024
概括
鱼的特定动态作用 (SDA) 受温度,食量和体重的影响,而不是性别. 由于新陈代谢的限制,较温暖的水域可能使较大的鱼类处于不利地位.
科学领域:
- 生理生态生态学 生理生态学
- 鱼类生物学 鱼类生物学
- 代谢缩放的代谢缩放
背景情况:
- 消化对动物的能量预算有很大影响,但性别,体重和食量差异的理解很少.
- 气候变暖可能会改变动物的生长和养动态,影响能量同化.
- 像鱼这样的物种的性大小变异 (SSD) 表明在能量获取或消耗方面存在基于性别的差异.
研究的目的:
- 量化成年鱼 (Sander vitreus) 的特定动态作用 (SDA) 在不同温度,配给大小和性别之间.
- 为了研究温度,体重和饮食量对SDA的影响.
- 为了确定SDA是否有助于Walleye的性大小变异 (SSD).
主要方法:
- 使用间歇性流量呼吸计测量SDA在雄性和雌性 walleye.
- 在2°C至20°C的温度下,服用两种配方大小 (2%和4%的体重).
- 分析了SDA持续时间,峰值氧气消耗率和SDA系数.
主要成果:
- 随着温度的上升,SDA持续时间减少,峰值氧气消耗增加.
- 峰值SDA与食量大小正相关,与体重负相关.
- 不论温度,体重,性别或食量大小,SDA系数始终保持在6%的水平.
- 标准和最大代谢率在性别之间没有差异,但最大代谢率随着体重增加而显著下降.
结论:
- 性在塑造SDA中起到最小的作用,并且似乎没有对Walleye的SSD做出贡献.
- 在温暖的水域,较大的鱼可能会面临生物能量挑战,因为其最大代谢率与身体质量一起降低.
- 这些发现突出了水生环境变暖对大型个体的潜在代谢缺点,影响了人口动态.
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