当地环境,非侵入性杂交,在急性热应激下影响本地鱼的心脏表现
Jeffrey T Strait1, Jared A Grummer1, Nicholas F Hoffman2
1Flathead Lake Biological Station, Wildlife Biology Program University of Montana Polson Montana USA.
Evolutionary applications
|February 23, 2024
概括
侵入性杂交并没有改善鱼在热应激下的心脏表现. 本地鱼种群表现出多样化的反应,突出了气候适应的基因型与环境相互作用. 保护多样化的息地是持续性的关键.
科学领域:
- 生态学和进化生物学.
- 气候变化生物学 气候变化生物学
- 保护遗传学 保护遗传学
背景情况:
- 气候变化正在增加水温,推动侵入性杂交,这威胁到本地物种.
- 在落基山脉,本地鱼和入侵的彩虹鱼之间的杂交正在增加.
- 彩虹鱼表现出更高的耐热性,这表明杂交可能会提高本地鱼的耐热性.
研究的目的:
- 评估侵入性杂交是否能改善面临急性热应激的本地鱼的心脏表现.
- 调查彩虹鱼添加剂在改变对水温升高的心脏反应中的作用.
主要方法:
- 从Flathead河上游排水的四条溪流中采集了鱼,各种混合物和热法.
- 在受控实验室温度升高 (10-28°C) 下测量个体心脏表现 (最大心率,心律失常时的温度).
主要成果:
- 在暴露于热应激的鱼中观察到心脏表现的显著变化.
- 本地杀鱼种群表现出明显的心脏反应热法,表明基因型-环境相互作用.
- 彩虹鱼添加剂在任何人群中都没有显著影响心脏表现 (最大心率,心律失常时的温度).
结论:
- 与适应更温暖的物种进行侵入性杂交在变暖条件下不会提高本地鱼的心脏性能.
- 原生鱼适应气候变化依赖于在各种河流环境中维持多样化的种群.
- 基因型与环境的相互作用对于理解本地鱼对热应激的生理反应至关重要.
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