高水压变化环境下鲫鱼的承受能力研究

以常见鱼种鲫鱼为研究对象,利用控制变量及统计分析方法开展鲫鱼在高水压条件下不同降压过程中承受能力的实验研究,分析了水压变化环境对鲫鱼的影响和不同大小的鲫鱼承压能力的差异。结果表明,压强和降压速率均对鲫鱼健康有重要影响,且两者关系密不可分。总体来讲,压强在3 MPa以内,鲫鱼均未受伤;压强在4~10 MPa范围内,压强和降压速率越大,鲫鱼受伤的几率越大;压强超过10 MPa后,鲫鱼会死亡,且压强越大,造成鲫鱼死亡的降压速率临界值越小。此外发现,鲫鱼对变压环境的承受能力似乎与其个体大小无明显的关系。该研究有望对未来高科技远洋渔业中所涉及的深水养殖及深水捕捞技术提供一定的理论依据和指导意义。

Research on the tolerance of crucian carp to high water pressure change

Taking the crucian carp as the research object, the tolerance to different depressurization rates under high water pressure conditions is explored by experimental investigation with the variable-controlling method and the statistical analysis method. The effects of water pressure changes on crucian carps and the pressure tolerance difference of individuals of various sizes are analyzed. The results show that two closely related factors, initial pressure and the depressurization rate, both have obvious effects on the health of crucian carp. Generally speaking, the crucian carps stay uninjured under the pressure within 3 MPa; when the pressure comes within the range of 4-10 MPa, the greater the pressure and the depressurization rate are, the more likely the carp gets injured; the crucian carp will die under the pressure exceeding 10 MPa, and the greater pressure results in the decline of the death depressurization rate threshold. In addition, it is found that the crucian carp tolerance to the pressure change does not seem to have any significant relationship with their individual size. The research is expected to provide some theoretical basis and guidance significance for deepwater aquaculture and deepwater fishing technology in the future high-tech oceanic fishery.