紫红笛鲷幼鱼环境耐受能力研究  

Study on the environmental tolerance of juvenile Lutjanus argentimaculatus

作　　者：余志德 黄小林 庄杰贵[4] 陈怡飚 李涛 杨育凯[2,3] 黄忠 舒琥[1] YU Zhide;HUANG Xiaolin;ZHUANG Jiegui;CHEN Yibiao;LI Tao;YANG Yukai;HUANG Zhong;SHU Hu(School of Life Sciences,Guangzhou University,Guangzhou 510006,China;Shenzhen Base of South China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Shenzhen 518121,China;South China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences/Key Laboratory of South China Sea Fishery Resources Exploitation&Utilization,Ministry of Agriculture and Rural Affairs/Guangdong Provincial Key Laboratory of Fishery Ecology and Environment,Guangzhou 510300,China;Shenzhen Longqizhuang Industrial Development Co.,Ltd,Shenzhen 518121,China)

机构地区：[1]广州大学生命科学学院,广东广州510006 [2]中国水产科学研究院南海水产研究所深圳试验基地,广东深圳518121 [3]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试验室/广东省渔业生态环境重点试验室,广东广州510300 [4]深圳市龙岐庄实业发展有限公司,广东深圳518121

出　　处：《水产科技情报》2024年第6期354-361,共8页Fisheries Science & Technology Information

基　　金：广东省重点领域研发计划项目(2020B1111030002);广东省渔业生态环境重点实验室开放基金(FEEL-2021-4);广东省现代农业产业技术体系海水鱼产业创新项目(2019KJ143)。

摘　　要：为研究紫红笛鲷(Lutjanus argentimaculatus)对水温、盐度、溶解氧、氨氮和亚硝酸盐等环境因子的耐受能力,选取平均体质量(9.7±1.5)g、体长(7.3±0.3)cm的紫红笛鲷幼鱼,采用渐变式方法探索紫红笛鲷对温度、盐度及低溶解氧的耐受能力,并设置不同浓度梯度,以探究紫红笛鲷对氨氮及亚硝酸盐的半致死浓度。结果显示,紫红笛鲷适宜的水温范围为16.0~35.0℃,临界下限水温为13.5℃、临界上限水温为40.6℃;当盐度在12.00~67.68时,紫红笛鲷活动正常,其极限耐受盐度为73.13±0.18;紫红笛鲷幼鱼的窒息临界点为(1.88±0.08)mg/L,DO_(50)为(0.60±0.03)mg/L,DO 100为(0.34±0.03)mg/L;在氨氮胁迫和亚硝酸盐胁迫下,紫红笛鲷幼鱼24、48、72、96 h的半致死浓度分别为170.30、126.62、95.05、64.90 mg/L和289.92、214.22、132.02、77.78 mg/L,氨氮安全浓度为6.49 mg/L,亚硝酸盐安全浓度为7.78 mg/L。To investigate the environmental tolerance of Lutjanus argentimaculatus to environmental factors,juvenile L.argentimaculatus with an average weight of(9.7±1.5)g and a body length of(7.3±0.3)cm was used to explore their tolerance to temperature,salinity,and low dissolved oxygen with the gradual method.Different concentration gradients were set to determine the median lethal concentration(LC 50)for ammonia nitrogen and nitrite.The results showed that the suitable water temperature range for L.argentimaculatus was(16~35)℃,with a critical lower water temperature of 13.5℃,and a critical upper water temperature of 40.6℃.Normal activity was observed when salinity ranged from 12.00 to 67.68,with an extreme salinity tolerance of(73.13±0.18).The critical point of asphyxiation for juvenile L.argentimaculatus was(1.88±0.08)mg/L,with DO 50 at(0.60±0.03)mg/L,and DO 100 at(0.34±0.03)mg/L.Under ammonia nitrogen stress,the LC 50 at 24,48,72,and 96 h were 170.30,126.62,95.05,and 64.90 mg/L,respectively.Under nitrite stress,the LC 50 at 24,48,72,and 96 h were 289.92,214.22,132.02,and 77.78 mg/L,respectively.The safe concentration for ammonia nitrogen is 6.49 mg/L,and the safe concentration for nitrite is 7.78 mg/L.

关 键 词：紫红笛鲷 环境耐受 氨氮胁迫 亚硝酸盐胁迫 温度 溶解氧 盐度 

分 类 号：S965.231[农业科学—水产养殖]