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研究了饥饿(20 d)和再投喂(5 d)条件下泥鳅M isgurnus anguillicaudatus的耗氧率、CO2排出率及排氨率的变化。结果表明:随着饥饿时间的延长,泥鳅的耗氧率呈下降趋势,即从饥饿开始时的200μg/(g.h)降至饥饿结束时的138μg/(g.h),下降了31%;CO2排出率呈先上升后下降的趋势,从饥饿开始时的200μg/(g.h)降至饥饿结束时的120μg/(g.h),下降了40%;排氨率则呈先下降后上升的趋势,从饥饿开始时的6.049μg/(g.h)升至饥饿结束时的7.808μg/(g.h),增加了29.1%;氧氮比(O/N)表现出下降趋势,表明泥鳅在饥饿状态下,首先动用脂肪和蛋白质作为主要能源,而后主要利用蛋白质;呼吸熵(RQ)则表现为先上升后下降。恢复投喂后5 d,耗氧率和CO2排出率明显上升,均达到饥饿初始值(180μg/(g.h))的90%;排氨率继续上升,达到9.208μg/(g.h),比饥饿初始值提高了52.2%;O/N和呼吸熵均呈上升趋势。
The oxygen consumption rate, CO2 emission rate and ammonia excretion rate of M isgurnus anguillicaudatus were studied under starvation (20 d) and re-feeding (5 d) conditions. The results showed that the oxygen consumption rate of loach declined with the increase of starvation time, from 200μg / (gh) at the beginning of starvation to 138μg / (gh) at the end of starvation, and the CO2 emission rate The trend of first increasing and then decreasing from 200μg / (gh) at the beginning of starvation to 120μg / (gh) at the end of starvation decreased by 40%. The ammonia excretion rate first decreased and then increased. From the beginning of starvation (6.049μg / (gh)) increased to 7.808μg / (gh) at the end of starvation, an increase of 29.1%. Oxygen to nitrogen ratio (O / N) showed a downward trend, indicating that the loach in the starvation state, the first use of fat and Protein as the main source of energy, and then the main use of protein; respiratory entropy (RQ) showed the first increase and then decline. The oxygen consumption rate and CO2 emission rate increased significantly after 5 d of feeding, reaching 90% of the initial value of starvation (180 μg / (gh)). The ammonia excretion rate continued to increase to 9.208 μg / (gh) Value increased 52.2%; O / N and respiratory entropy showed an upward trend.