时间热应激对Penaeus vannamei的影响:生长性能和生理可塑性
Diana R Barajas-Sandoval1, Cristina Escobedo-Fregoso2, Eduardo Quiroz-Guzmán1
1Centro de Investigaciones Biológicas del Noroeste, S.C. Av. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur., La Paz, B.C.S 23096, Mexico.
概括
太平洋白 (Penaeus vannamei) 具有生理性可塑性,短期的热应激促进了生长,短期的寒冷应激导致恢复后的补偿生长. 长时间的热应力显著影响的生理和能量储备.
科学领域:
- 水产养殖是水产养殖的一种方式.
- 海洋生物学 海洋生物学
- 环境生理学环境生理学
背景情况:
- 在全球范围内,Penaeus vannamei的水产养殖非常重要.
- 热应激显著影响的生长,生存和生理学.
- 了解对温度波动的反应对于可持续的水产养殖至关重要.
研究的目的:
- 评估短期 (7天) 和长期 (14天) 低温和高温对Penaeus vannamei生长,生存和生理反应的影响.
- 在最佳温度条件下,评估Penaeus vannamei在热应激后的恢复能力.
- 为了研究不同的热应力持续时间后的生化和酶调整.
主要方法:
- Penaeus vannamei后幼虫在7天和14天内接受了不同的温度处理 (22°C和32°C),随后进行了28°C的恢复阶段.
- 每周监测生长参数 (体重增加,特定生长率,料摄入量,料转换率) 和生存率.
- 生物化学成分,抗氧化酶活性 (SOD,CAT,GPx) 和消化酶活性 (脂酶,基米素) 在肌肉,肝和血淋巴中进行了分析.
主要成果:
- 短期高温 (32°C7天) 增强了生长速度和料摄入量,而低温 (22°C7天) 导致康复后的补偿生长.
- 长期高温 (14天) 增加了能源消耗和耗尽储备,而低温 (14天) 在恢复期间显示出有限的能量调动.
- 抗氧化酶活动不受短期压力的影响,但在长时间的热应激 (14天) 后显著改变.
结论:
- 潘尼乌斯·瓦纳梅 (Penaeus vannamei) 在应对热应激和恢复时表现出显著的生理可塑性.
- 短期的热应激可以管理,但长期暴露会对生理和能量储备产生负面影响.
- 这些发现为优化水产养殖实践提供了关键的见解,以减轻气候变化引起的温度变化的不利影响.
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