| 摘要: |
| 为了研究温度对方斑东风螺(Babylonia areolata)能量收支的影响, 采用室内静水法, 分析了不同养殖水体温度条件下方斑东风螺幼螺的摄食率、排粪率、耗氧率、排氨率、黏液排泄率的变化规律。结果表明, 方斑东风螺摄食率、排粪率、耗氧率和排氨率均随温度升高均呈现先上升后下降趋势。其中各温度处理组摄食率差异显著(P < 0.05), 在23℃时最低为2.548±0.093 mg·g-1·h-1, 29℃时最高为4.958±0.150 mg·g-1·h-1; 排粪率为1.695±0.037~2.892±0.074 mg·g-1·h-1, 在29℃时达到最高; 耗氧率在29℃时最高为0.437±0.054 mg·g-1·h-1, 23℃时最低为0.202±0.027 mg·g-1·h-1; 在本实验条件下, 方斑东风螺排氨率为0.009±0.001~0.025±0.003 mg·g-1·h-1, 各温度处理组间均有显著差异(P < 0.05), 且在29℃时最高为0.025±0.003 mg·g-1·h-1。黏液排泄率在23℃时最高为0.030±0.001 mg·g-1·h-1, 显著高于其他各温度组(P < 0.05)。基于不同温度下能量收支方程, 得出26℃下方斑东风螺生长余能最多, 占摄入总能量的37.855%, 其次是29℃、32℃和23℃, 分别为37.850%、32.098%和30.438%。 |
| 关键词: 方斑东风螺 温度 生理代谢 黏液排泄率 能量收支 |
| DOI： |
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| 基金项目:国家重点研发计划项目(2018YFD0900704), 院士团队创新中心项目(HD-YSZX-202011) |
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| Effects of different temperatures on the physiological metabolism of Babylonia areolate |
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Sun Yunchao, Ma Qingxia, Wang Aimin, Yang Yi, Yu Feng, Gu Zhifeng, Liu Chunsheng
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Hainan University
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| Abstract: |
| The ivory shell Babylonia areolata belonging to class Gastropoda, order Stenoglossa, family Buccinidae, is widely cultured in the South-eastern coastal provinces, including Hainan, Guangdong and Fujian Provinces. During the daily rearing of B. areolata, the temperature fluctuation always happens, which caused by extreme weather, such as heat and cooling, etc., and lead to the reduction of growth rate, even death. In this study, in order to explore the effect of temperature on the energy metabolism of B. areolata, we analyzed the changes in feeding rate, fecal excretion rate, oxygen consumption rate, ammonia excretion rate, and mucus excretion rate of B. areolata under different water temperature levels by using the indoor hydrostatic method. The results showed that the feeding rate, fecal excretion rate, oxygen consumption rate, and ammonia excretion rate of the B. areolata showed a trend of increasing and then decreasing with the increase of temperature. There were significant differences in feeding rates among treatment groups (P < 0.05), with the lowest rate of 2.548±0.093 mg·g-1·h-1 at 23°C and the highest rate of 4.958±0.150 mg·g-1·h-1 at 29°C; the fecal discharge rates ranged from 1.695±0.037 to 2.892±0.074mg·g-1·h-1, and the highest rate were observed at 29°C. The highest and lowest oxygen consumption rates were 0.437±0.054 and 0.202±0.027 mg·g-1·h-1 at 29°C and 23°C, respectively; the ammonia excretion rates were 0.009±0.001~0.025±0.003 mg·g-1·h-1 under the experimental conditions, in which the highest rates were observed at 29°C (0.025±0.003 mg·g-1·h-1). Significant differences of ammonia excretion rates were observed among each temperature treatment groups (P < 0.05). The mucus excretion rate was 0.030±0.001 mg·g-1·h-1 at 23°C , which showed significantly higher than other groups (P < 0.05). Based on the energy balance equation at different temperatures, it can be concluded that the residual energy for growth of B. areolata was the highest at 26°C, accounting for 37.855% of the total energy intake, followed by 37.850%, 32.098%, and 30.438% at 29°C, 32°C and 23°C, respectively. In conclusion, the suitable cultured temperature levels for B. areolata were 26°C and 29°C according to the energy metabolism. |
| Key words: Babylonia areolata Temperature Physiological metabolism Mucus excretion rate Energy balance |