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引用本文:杨斯琪,郑洪武,孙颖,朱爱意.氨氮、温度和体重对大口黑鲈(Micropterus salmoides)幼鱼耗氧率和窒息点的影响.海洋与湖沼,2019,50(6):1328-1333.
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氨氮、温度和体重对大口黑鲈(Micropterus salmoides)幼鱼耗氧率和窒息点的影响
杨斯琪, 郑洪武, 孙颖, 朱爱意
浙江海洋大学 国家海洋设施养殖工程技术研究中心 舟山 316022
摘要:
采用封闭流水式实验方法,研究了氨氮、温度和体重对大口黑鲈(Micropterus salmoides)耗氧率、窒息点的影响。结果表明:在设定的总氨氮浓度0-8.61mg/L范围,随着氨氮浓度增加,大口黑鲈幼鱼耗氧率呈现先增加后降低的趋势,峰值为0.338mg/(g·h),窒息点随着氨氮浓度的增加而递增,影响显著(P<0.05);在13-33℃的实验温度范围,随着温度升高,耗氧率先增加,在29℃时达到峰值0.392mg/(g·h),随后出现下降。在体重6.66-15.87g范围,耗氧率随着体重的增加而下降,最低值为0.112mg/(g·h);耗氧率存在明显的昼夜节律变化,夜均0.214mg/(g·h)>日均0.199mg/(g·h),二者差异显著(P<0.05),并在2:00-6:00和18:00-20:00时间段出现两个峰值。
关键词:  氨氮  温度  体重  耗氧率  窒息点  昼夜变化
DOI:10.11693/hyhz20190600115
分类号:S965.1
基金项目:国家海洋公益性项目,201505025号。
EFFECTS OF AMMONIA EXPOSURE, TEMPERATURE, AND BODY WEIGHT ON OXYGEN CONSUMPTION RATE AND ASPHYXIATION POINT OF JUVENILE LARGEMOUTH BASS MICROPTERUS SALMOIDES
YANG Si-Qi, ZHENG Hong-Wu, SUN Ying, ZHU Ai-Yi
Zhejiang Ocean University, National Engineering Research Center for Marine Aquaculture, Zhoushan 316022, China
Abstract:
The effects of ammonia, temperature, and body weight on oxygen consumption rate and asphyxiation point of Micropterus salmoides were studied in a closed-recirculation experiment. Results show that within the range of ammonia concentration from 0 to 8.61mg/L, the oxygen consumption rate increased first and then decreased with a peak value of 0.338mg/(g·h). The asphyxiation point increased with the increase of ammonia concentration, and showed significant difference (P<0.05). Within the experimental temperature range of 13-33℃, the oxygen consumption rate increased first, reached a peak of 0.392mg/(g·h) at 29℃, and then declined. The oxygen consumption rate decreased with the body weight increase with the lowest value of 0.112mg/(g·h). The oxygen consumption rate showed an obvious change of circadian rhythm with significant difference (P<0.05). The night average and daytime average of the oxygen consumption rate was 0.214 and 0.199mg/(g·h), respectively. The average oxygen consumption rate at night was much higher than that in the daytime, and two peaks appeared at 2:00-6:00 and 18:00-20:00.
Key words:  ammonia nitrogen  temperature  body weight  oxygen consumption rate  asphyxiation point  circadian rhythm change
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