| 摘要: |
| 采用实验生态学方法，研究了不同盐度和氨氮浓度变化对方斑东风螺存活以及能量收支的影响。结果显示，方斑东风螺的存活率随着盐度上升呈现先上升后下降的趋势，当盐度为25和30时，方斑东风螺的存活率为100%，低盐96 h LC50为10.14，高盐为44.36；方斑东风螺存活率随氨氮浓度上升逐渐下降，当氨氮浓度为0-20mg/L时，存活率均为100%；氨氮96 h LC50为253.83 mg/L。盐度和氨氮对方斑东风螺的摄食率、排粪率、耗氧率和排氨率均具有显著影响(P﹤0.05)。盐度实验中，方斑东风螺的摄食率、排粪率和排氨率在盐度30时达到最大值，分别为20.50、8.62和0.07 mg/(g?h)，耗氧率在盐度35时达到最大值，为1.84 mg/(g?h)。氨氮实验中，摄食率和排粪率在10 mg/L时达到最大值，分别为23.58和10.42 mg/(g?h)，耗氧率和排氨率在20 mg/L时达到最大值，分别为2.49和0.13 mg/(g?h)。通过能量收支方程发现，随着盐度和氨氮浓度的上升，方斑东风螺生长能占比均呈现先上升后下降的趋势，其在盐度30和氨氮浓度5mg/L时达到最大值。 |
| 关键词: 方斑东风螺，盐度，氨氮，存活率，能量收支 |
| DOI： |
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| Effects of salinity and ammonia nitrogen on the survival and energy budget of snail Babylonia areolate |
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Zhou Jiancong, Gu Zhifeng, Ye Bingcong, Liu Chuang, Yang Yumei, Liu Chunsheng, Wang Aimin, Shi Yaohua
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Hainan University
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| Abstract: |
| The effects of different salinity and ammonia nitrogen levels on the survival rate and energy budget of Babylonia areolata were studied using experimental ecology methods. Results showed that the survival rate of B. areolata increased and then decreased with the increase of salinity. When B. areolata were reared in sea water with salinity 25 and 30, the survival rates were 100%, and the low and high-salt 96 h LC50 were 10.14 and 44.36, respectively. When the ammonia nitrogen concentration was 0-20mg/L, the survival rate of B. areolata was 100%, and then decreased with the increase of ammonia nitrogen concentration; the 96 h LC50 of ammonia nitrogen was 253.83mg/L. Salinity and ammonia nitrogen had significant effects on the ingestion rate, feces production rate, oxygen consumption rate and ammonia excretion rate of snails(P﹤0.05). The feeding rate, feces production rate, and ammonia excretion rate of B. areolata reached maximum at the salinity of 30, which were 20.50, 8.62 and 0.07 mg/(g?h), respectively; the oxygen consumption rate reached its maximum at a salinity of 35, which is 1.84 mg/(g?h). In ammonia nitrogen experiment, the feeding rate and feces production rate reached maximum at 10 mg/L, which were 23.58 and 10.42 mg/(g?h), respectively. The oxygen consumption rate and the ammonia excretion rate reached maximum at 20 mg/L, which were 2.49 and 0.13 mg/(g?h) respectively. According to the energy budget equation, the growth energy ratio of B. areolata increased first and decreased afterwards with increase of salinity and ammonia nitrogen concentration, and reached maximum at the salinity of 30 and the ammonia nitrogen concentration of 5 mg/L, respectively. |
| Key words: Babylonia areolata salinity ammonia nitrogen survival rate energy budget |