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渔业研究 ›› 2024, Vol. 46 ›› Issue (2): 121-128.DOI: 10.14012/j.cnki.fjsc.2024.02.002

• 论文与报告 • 上一篇    下一篇

不同温度下四指马鲅幼鱼耗氧率及其窒息点研究

林欣1,2(), 谢希尧1,2, 区又君1,*(), 李加儿1, 吴水清3   

  1. 1.中国水产科学研究院南海水产研究所,农业农村部南海渔业资源开发利用重点实验室,广东 广州 510300
    2.大连海洋大学水产与生命学院,辽宁 大连 116000
    3.福建省水产研究所,福建 厦门 361013
  • 收稿日期:2023-07-03 出版日期:2024-04-25 发布日期:2024-04-25
  • 通讯作者: 区又君(1964—),女,研究员,从事鱼类生物学、发育生物学与水产增养殖技术研究。E-mail:ouyoujun@126.com
  • 作者简介:林 欣(1998—),女,硕士研究生,研究方向为鱼类生物学、分子生物学。E-mail:1600662461@qq.com
  • 基金资助:
    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);中国水产科学研究院基本科研业务费资助项目(2023TD58);福建省海洋服务与渔业高质量发展专项(FJHY-YYKJ-2024-1-16)

The study of the oxygen consumption rate and asphyxiation point of juvenile Eleutheronema tetradactylum under different temperatures

LIN Xin1,2(), XIE Xiyao1,2, OU Youjun1,*(), LI Jia’er1, WU Shuiqing3   

  1. 1. Key Laboratory of Fisheries Resources Development and Utilization in the South China Sea, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, China Academy of Fisheries Science,Guangzhou 510300, China
    2. College of Fisheries and Life Sciences, Dalian Ocean University, Dalian 116000, China
    3. Fisheries Research Institute of Fujian, Xiamen 361013, China
  • Received:2023-07-03 Online:2024-04-25 Published:2024-04-25

摘要:

为探讨四指马鲅幼鱼(Eleutheronema tetradactylum)在不同水温条件下耗氧率和窒息点的变化规律,试验比较了不同温度(22、27、32 ℃)对平均全长(4.5±0.5)cm、平均体质量(1.5±0.5)g四指马鲅幼鱼耗氧的影响。试验结果表明:1)在本试验条件下,水体温度越高,幼鱼全部死亡的时间越短,水体中所含溶解氧(DO)的质量浓度越高,22 ℃窒息点为1.39 mg/L,27 ℃窒息点为1.54 mg/L,32 ℃窒息点为1.76 mg/L;2)各温度组中幼鱼的耗氧率随试验时间的延长呈下降趋势,且温度越高,其耗氧率下降速度越快,当耗氧率从试验之初的1.418、2.346、4.243 mg/(g·h) 下降到0.4~0.5 mg/(g·h) 时,幼鱼全部死亡,不同温度组变化减慢,相邻观测时间点浓度差异不显著(P>0.05),对照组幼鱼存活率为100%;3) 试验过程中,当22、27、32 ℃温度组的DO含量分别为2.53、2.90、3.10 mg/L时,幼鱼开始出现乱窜、焦躁不安、偶尔跃出水面以及咧鳃等现象,随着试验持续进行,幼鱼跃出水面的频次增加,鳃盖振动幅度随之增加;其剧烈应激后静卧于水底、咧鳃、抽搐,然后窒息死亡。

关键词: 四指马鲅, 温度, 耗氧率, 窒息点

Abstract:

To investigate the changes in oxygen consumption rate and suffocation point of Eleutheronema tetradactylum under different water temperature conditions, the experiment compared the effects of different temperatures (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 conditions 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 ℃ is 1.54 mg/L, and the suffocation point at 32 ℃ is 1.76 mg/L; 2) The oxygen consumption rate of juvenile fish in each temperature group showed a decreasing trend with the extension of experimental time, and the higher the temperature, the faster the decrease rate of oxygen consumption rate. When the oxygen consumption rate decreased from 1.418, 2.346, and 4.243 mg/(g·h) at the beginning of the experiment to 0.4-0.5 mg/(g·h), all juvenile fish died, and the changes in different temperature groups slowed down. The concentration difference between adjacent observation points was not significant (P>0.05), while the survival rate of juvenile fish in the control group was 100%; 3) During the experiment, 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 amplitude of gill cover vibration increased accordingly. After intense stress, they lay still at the bottom of the water, twitching and suffocating to death.

Key words: Eleutheronema tetradactylum, temperature, oxygen consumption rate, asphyxiation point

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