渔业研究2024，Vol.46Issue(2)：121-128,8.DOI:10.14012/j.cnki.fjsc.2024.02.002
不同温度下四指马鲅幼鱼耗氧率及其窒息点研究
The study of the oxygen consumption rate and asphyxiation point of juvenile Eleutheronema tetradactylum under different temperatures
摘要
Abstract
To investigate the changes in oxygen consumption rate and suffocation point of Eleutheronema tetra-dactylum under different water temperature conditions,the experiment compared the effects of different temper-atures(22,27,32℃)on the oxygen consumption of E.etradactylum with an average length of(4.5±0.5)cm and an average body mass of(1.5±0.5)g.The experimental results show that:1)Under the con-ditions of this experiment,the higher the water temperature,the shorter the time for all juvenile fish to die,and the higher the mass concentration of dissolved oxygen(DO)in the water.The suffocation point at 22℃is 1.39 mg/L,the suffocation point at 27℃is1.54 mg/L,and the suffocation point at 32℃is1.76 mg/L;2)The oxygen consumption rate of juvenile fish in each temperature group showed a decreasing trend with the ex-tension of experimental time,and the higher the temperature,the faster the decrease rate of oxygen consump-tion rate.When the oxygen consumption rate decreased from 1.418,2.346,and 4.243 mg/(g·h)at the beginning of the experiment to0.4-0.5 mg/(g·h),all juvenile fish died,and the changes in different tem-perature groups slowed down.The concentration difference between adjacent observation points was not signifi-cant(P＞0.05),while the survival rate of juvenile fish in the control group was 100%;3)During the exper-iment,when the DO content of each temperature group was 2.53,2.90,and 3.10 mg/L,the juvenile fish began to exhibit disorderly movement,restlessness,occasional jumping out of the water,and gill opening.As the experiment continued,the frequency of the juvenile fish jumping out of the water increased,and the am-plitude of gill cover vibration increased accordingly.After intense stress,they lay still at the bottom of the wa-ter,twitching and suffocating to death.关键词
四指马鲅/温度/耗氧率/窒息点Key words
Eleutheronema tetradactylum/temperature/oxygen consumption rate/asphyxiation point分类
农业科技引用本文复制引用
林欣,谢希尧,区又君,李加儿,吴水清..不同温度下四指马鲅幼鱼耗氧率及其窒息点研究[J].渔业研究,2024,46(2):121-128,8.基金项目
广东省省级乡村振兴战略专项资金种业振兴项目(2022-SPY-00-013) （2022-SPY-00-013）
中国水产科学研究院基本科研业务费资助项目(2023TD58) （2023TD58）
福建省海洋服务与渔业高质量发展专项(FJHY-YYKJ-2024-1-16) （FJHY-YYKJ-2024-1-16）
