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在快速温度变化下,Hippocampus kuda和Oryzias melastigma的适应性和生长
Yongjian Xu1, Penghong Lin1, Wenxin Zhang1
1Key Laboratory of Aquacultural Biotechnology of MOE, School of Marine Science, Ningbo University, Ningbo, China.
Frontiers in physiology
|October 4, 2024
概括
温度变化的速度对水产养殖生物有重大影响. 海马 (Hippocampus kuda) 比Oryzias melatigma对快速温度变化更敏感,需要精确的环境控制才能生存.
科学领域:
- 水产养殖科学 水产养殖科学
- 环境生理学环境生理学
- 鱼类生物学 鱼类生物学
背景情况:
- 温度波动极大地影响了水产养殖生物的生长.
- 对温度变化的适应性涉及振幅和速度.
- 了解温度变化速度的影响对于人工农业至关重要.
研究的目的:
- 为了研究不同温度变化速度对Hippocampus kuda和Oryzias melatigma的影响.
- 为了比较这两种物种对不同温度变化幅度 (2°C和4°C) 和速度的反应.
- 分析养,新陈代谢,生理学,免疫力和生长中的相似之处和差异.
主要方法:
- 选择了两种具有广泛适应性的鱼类物种:Hippocampus kuda和Oryzias melatigma.
- 鱼类在不同速度 (0.5°C/h,1°C/h,2°C/h,直接输入) 和幅度 (2°C,4°C) 的控制温度变化.
- 分析了养,新陈代谢,生理学,免疫力和生长参数的反应,包括基因表达.
主要成果:
- 在2°C振幅下,Oryzias melatigma没有显示生长影响,而Hippocampus kuda在生长,食物摄入和酶/基因反应方面表现出显著差异.
- 在4°C振幅下,两种物种的影响更为明显;Hippocampus kuda的临界安全速度为~0.5°C/h,而Oryzias melatigma的生长仅在直接输入加热时才会下降.
- 基因表达模式有所不同:海马 kuda 基因被高速度抑制,而 Oryzias melatigma 基因 (压力,脂质代谢,免疫) 对高速度做出了有效的反应.
结论:
- 海马 (Hippocampus kuda) 有一个单一的,短暂的能量源来抵抗压力,导致长时间的温度压力下病态压力和疾病爆发.
- 与Hippocampus kuda相比,Oryzias melatigma对快速温度变化的弹性更强.
- 精确的环境温度控制对于Hippocampus kuda水产养殖至关重要,以防止快速温度波动对生长和生存产生负面影响.
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