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甲维盐对安氏伪镖水蚤(Pseudodiaptomus annandalei)摄食、呼吸、发育和生殖的影响
潘洁红,刘光兴
1.中国海洋大学环境科学与工程学院 青岛 266100;2.中国海洋大学海洋环境与生态教育部重点实验室 青岛 266100
摘要:
甲氨基阿维菌素苯甲酸盐(Emamectin benzoate,EMB)(简称甲维盐)作为一种新型高效安全的农药,近年来得到了广泛的使用。为探讨甲维盐对海洋桡足类的影响,本文以安氏伪镖水蚤为研究对象,通过急慢性暴露实验研究了不同甲维盐浓度对安氏伪镖水蚤摄食、呼吸、发育、生殖的影响。结果表明,甲维盐对安氏伪镖水蚤的48h LC50和96h LC50分别为4.13和1.98μg/L;随着甲维盐浓度的升高,安氏伪镖水蚤的摄食率呈现降低趋势;在甲维盐浓度0.25μg/L时,安氏伪镖水蚤呼吸率显著升高,而甲维盐浓度超过0.50μg/L时,呼吸率呈现降低的趋势;在甲维盐高浓度组(0.2000μg/L),第二世代的发育时间显著延长,存活率与生殖力均显著降低。以上结果说明,安氏伪镖水蚤对甲维盐较为敏感,高浓度甲维盐会影响安氏伪镖水蚤的摄食、呼吸、发育和生殖,进而可能影响到其种群动态。本研究为进一步判定甲维盐的生态风险以及我国海洋渔业环境保护提供了科学依据。
关键词:  甲维盐  安氏伪镖水蚤  摄食  发育  生殖
DOI:10.11693/hyhz20180400098
分类号:X171.5
基金项目:国家自然科学基金项目,31372509号。
THE IMPACT OF EMAMECTIN BENZOATE ON THE FEEDING, RESPIRATION, SURVIVAL, DEVELOPMENT, AND REPRODUCTION OF PSEUDODIAPTOMUS ANNANDALEI
PAN Jie-Hong1, LIU Guang-Xing1,2,3
1.College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;2.Key Laboratory of Marine Environment & amp;3.Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China
Abstract:
Emamectin benzoate (EMB), as a new pesticide with high efficiency and low toxicity, has been widely used for pest and disease control in aquaculture and agriculture in recent years. After EMB enters the environment, it could pose a threat to other non-target organisms, which would be harmful to the ecological stability. To explore the potential impact of EMB on the marine ecosystem, we investigated the effects of EMB on the feeding, respiration, development, and reproduction of copepod Pseudodiaptomus annandalei, a small-sized crustacean. The results show that the 48h LC50 and 96h LC50 of EMB were 4.13μg/L and 1.98μg/L, respectively. With the increase of the EMB concentration, the feeding rate of P. annandalei decreased, the respiration rate increased first and then decreased, the development time was prolonged significantly, and the survival rate and fecundity decreased. The above findings indicate that P. annandalei is sensitive to EMB, which may be harmful to the feeding, respiration, development, and reproduction of P. annandalei. EMB may affect the population dynamics of the copepod. Therefore, the concentration of EMB should be controlled strictly in the aquaculture practice.
Key words:  emamectin benzoate  Pseudodiaptomus annandalei  feeding  development  reproduction
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