霍文鱼 (Leptobarbus hoevenii) 的战略代谢需要应对不断变化的环境
Suhaini Mohamad1, Sharifah Rahmah1,2, Rabiatul Adawiyyah Zainuddin1
1Higher Institution Center of Excellence (HICOE), Institute of Tropical Aquaculture and Fisheries, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Malaysia.
Heliyon
|February 26, 2024
概括
霍芬的鱼在酸性水中减少了食. 高温和低pH值会增加新陈代谢率和氨分泌量,这表明这种鱼类的生理压力.
科学领域:
- 水生物质毒理学研究
- 环境生理学环境生理学
- 鱼类生物学 鱼类生物学
背景情况:
- 水生动物,特别是氨类远星生物,在生理上受到水温上升和淡水酸化的影响.
- 了解这些影响对于预测气候变化对淡水生态系统的生态后果至关重要.
研究的目的:
- 研究温度升高和pH值降低对霍芬鱼 (Leptobarbus hoevenii) 的代谢策略的影响.
- 评估霍文鱼如何调整其生理反应以应对温暖和酸化的综合压力因素.
主要方法:
- 霍芬的鱼被暴露在四个实验条件下:28°C/pH 7,32°C/pH 7,28°C/pH 5,和32°C/pH 5 20天.
- 进行了一种呼吸试验,以测量代谢反应,包括氧气消耗和氨分泌.
- 分析了食性能,能量调动 (肝脏和肌肉蛋白质) 以及能量储备.
主要成果:
- 在低pH条件下 (pH5) 霍芬鱼的养性能显著下降.
- 与对照组相比,暴露于高温 (32°C) 和低pH (pH5) 的情况导致氧气摄入量和氨分泌量增加了两倍.
- 在低pH (pH5) 条件下,鱼能调动肝脏和肌肉蛋白质,而高温则能使肝脏和肌肉节能.
结论:
- 霍芬的鱼对低水pH值和高温都表现出敏感性.
- 该物种采用不同的生理策略,包括改变的代谢率和能量调动,以适应这些环境变化.
- 这些发现凸显了霍文鱼对气候变化引起的水生环境变化的脆弱性.
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