| 引用本文: | 何家菀,何振荣,郭琼林.有毒铜绿微囊藻对鱼和溞的毒性.湖泊科学,1997,9(1):49-56. DOI:10.18307/1997.0108 |
| He Jiawan,He Zhenrong,Guo Qionglin.The toxicity of Microcystis aeruginosa to fishes and daphnia. J. Lake Sci.1997,9(1):49-56. DOI:10.18307/1997.0108 |
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| 摘要: |
| 用有毒铜绿微囊藻细胞及其从毒细胞中提取的毒素喂养和腹腔注射鱼类,结果表明:(1)微囊藻毒素MCYST-LR对所有实验过的鱼有毒害作用(LD50为110-500μg/kg).注射毒素24h后,鱼肝电镜超微结构观察均表现出肝损伤.(2)在受控条件下,当用有毒铜绿微囊藻作为食物喂养日鲢和罗非鱼时,鱼类能在以毒藻为唯一食物的环境中生活20d以上.白鲢和罗非鱼粪便的毒性比喂食藻类的毒性分别降低约2-4.5倍,其肝的超微结构现察仍有轻度损伤.(3)在培养液中加入15μg/mLMCYST-LR和用实验室纯培养的铜绿微囊藻作为食物培养枝角类时,均可使它们在48h死亡.以无毒微囊藻培养时则生长不良亦不怀卵,表明它不是枝角类合适的食物. |
| 关键词: 铜绿微囊藻 鱼类 溞 毒性 |
| DOI：10.18307/1997.0108 |
| 分类号: |
| 基金项目:国家自然科学基金39370151 |
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| The toxicity of Microcystis aeruginosa to fishes and daphnia |
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He Jiawan, He Zhenrong, Guo Qionglin
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Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 1430072
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| Abstract: |
| This study is dealt with the effects of toxic Microcystis aeruginosa and Microcystin (MCYST) on fishes and Daphnia magna by feeding and intraperitoneal injection. The results suggested were as follows:1. MCYST-LR was pernicious to all of the tested fishes. 1) Grass Carp:mean weight was about 10-12 g. The dosage of injection was about 65-300 μg/kg, LD50 110 μg/kg; 2) Silver Carp:mean weight 18-20 g, dosage of injection 150-400 μg/kg, LD50 350 Hg/kg; 3) Tilapia:mean weight 32-35 g, dosage of injection 400-800 μg/kg, LD50 500 μg/mg. Liver injury was discovered by observing fish liver altrastructure 24hrs after the injection with Microcystins. The liver damage of Grass Carp was more serious than that of the other two fishes. 2. When Silver Carp and Tilapia fed on toxic M. aeruginosa as the only diet, they can be alive for more than 20 days. The toxicity of feces decreased 2-4.5 times respectively compared with that of M. aeruginosa. The absorption spectra and microscope observation of the feces of both fishes reflected that the ability of digesting and absorbing of toxic algae cell and toxin for Tilapia was greater than that of Silver Carp; both fishes had little liver damage by observing their liver ultrastructure, 3. Fed on Micnx'ystis ueruginosa or added with 15 μg/mL MCYST-LR to the medium, Daphnia magna may die 48hrs later. Daphnia magna grew slowly and did not carry eggs when fed on nontoxic M. aeruginosa 8508, showing that Microcystis was not a suitable food for Daph-nia. |
| Key words: Microcystis aeruginosa fishes Daphnia toxicity |
