Ammonia nitrogen excretion in Mandarin Fish (Siniperca chuatsi) and Grass Carp (Ctenopharyngodon idellus) fed practical diets: the effects of water temperature

详细信息    查看全文

• 作者：Liu Fang ; Xiao-Li Bai ; Xu-Fang Liang ; Shan He ; Xiao-Ze Guo ; Ling Li ; Bin Li ; Dan Shen and Ya-Xiong Tao
• 刊名：Aquaculture Research
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：48
• 期：3
• 页码：836-843
• 全文大小：444K
• ISSN：1365-2109

文摘

To understand the actual production of fish culture about the utilization of dietary protein and excreta impact on the environment between mandarin fish (Siniperca chuatsi) and grass carp (Ctenopharyngodon idellus), the study to investigate the effect of temperatures (19 ± 0.5°C, 24 ± 0.5°C and 29 ± 0.5°C) on ammonia-N excretion in mandarin fish and grass carp under fed and fasted states was conducted. These two species were fed a practical diet containing 325.2 g kg⁻¹ crude protein at 3% body weight per day. The ammonia-N excretion rate was significantly increased when temperature increased from 19 to 29°C, and a linear relationship between ammonia-N excretion rate and temperature. The maximum ammonia-N excretion levels of mandarin fish and grass carp were observed at 4–8 h and 2–4 h after feeding, respectively, and the minimum values for both species were observed at 24 h after feeding. Under the feeding condition, mandarin fish had a lower ammonia-N excretion level compared to grass carp at 24°C and 29°C. The average amount of ammonia-N excreted by mandarin fish at 24 h is significantly higher than grass carp under fasting conditions, except 19 ± 0.5°C. These results indicated that mandarin fish might make better use of protein at higher temperature than grass carp when fed practical diets in commercial production. These results of this study suggested that mandarin fish had a lower ammonia-N excretion level compared with grass carp, making a less contribution to environmental loading in an intensive fish culture.