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学科主题: Fisheries; Marine & Freshwater Biology
题名: Growth, faecal production, nitrogenous excretion and energy budget of juvenile cobia (Rachycentron canadum) relative to feed type and ration level
作者: Sun, LH ; Chen, HR ; Huang, LM ; Wang, ZD
通讯作者: waa-to@163.com
关键词: juvenile cobia (Rachycentron canadum) ; feed type ; ration level ; growth ; faecal production ; nitrogenous excretion ; energy budget
刊名: AQUACULTURE
发表日期: 2006
卷: 259, 期:40547, 页:211-221
收录类别: sci
部门归属: Chinese Acad Sci, Marine Biol Res Stn Daya Bay, Shenzhen 518121, Guangdong, Peoples R China; Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China
项目归属: 广东省海洋药物重点实验室
摘要: Growth, faecal production, nitrogenous excretion and energy budget of juvenile cobia (initial body weight similar to 28 g) at different ration levels (RL, % per day) ranging from starvation to ad libitum for three feed types, i.e., natural sardine fish (NSF), commercial eel formulated feed (CEFF) and commercial marine-fish formulated feed (CMFF), were investigated in this study. Both feed type and ration level affected significantly faecal production (f, mg g(-1) day(-1)), and nitrogenous excretion (u, mg g-1 day-1). Feed type, not ration level, for the NSF-fed and CEFF-fed groups and both feed type and ration level for the CMFF-fed group affected significantly feed absorption efficiency (FAE, %). For each feed type group, faecal production and nitrogenous excretion increased whereas feed absorption efficiency in dry weight (FAE(d), %), protein (FAE(p),' %) and energy (FAE(e), %), with a small variation, tended to decrease as ration increased. Specific growth rate in wet weight (SGR(w), % per day), dry weight (SGR(d), % per day), protein (SGR(p), % per day) and energy (SGR(e), % per day) for the NSF-fed and CEFF-fed groups was much higher than that for the CMFF-fed group, and the growth-ration relationship was a decelerating curve described as a logarithmic equation for the NSF-fed and CEFF-fed group, and a linearity described as a simple equation for the CMF F-fed group. There was a significant difference of the slopes in the regression equations among three feed type groups by analysis of covariance. Multiple regression analysis showed that the relationships between specific growth rate (SGR, % per day) and ration level in dry weight (RLd, % per day) as well as feed type (D1 D2) were SGR(w)=-2.226+4.0221n(RLd+1)-0.895DI-2.705D2, SGR(dw)=-2.686+4.422ln(RLd+1)-1.014D1 -2.969D2, SGR(p)=-2.481+4.316ln(RLd+1)-1.122DI-2.943D2 and SGR,=-3.239+4.972ln(RLd+1)-0.954D1-3.053D2. Feed conversion efficiency, in wet weight (FCEw %), dry weight (FCEd, %), protein (FCEp, %) and energy (FCEe, %) for the NSF-fed and CEFF-fed groups was much higher than that for the CMFF-fed group, and with increased ration FCE increased or first increased then decreased for the NSF-fed and CEFF-fed groups and increased significantly for the CMFF-fed group. Energy budgets of juvenile cobia at satiation ration were 100A=59R+41G for NSF-fed group, 100A=67R+33G for CEFF-fed group and 100A=83R+17G for CMFF-fed group, where A is assimilated energy R is energy spent in metabolism and G is energy stored as growth. (c) 2006 Elsevier B.V. All rights reserved.
原文出处: 查看原文
WOS记录号: WOS:000240559500025
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/5184
Appears in Collections:广东省海洋药物重点实验室_期刊论文

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Recommended Citation:
Sun, LH; Chen, HR; Huang, LM; Wang, ZD.Growth, faecal production, nitrogenous excretion and energy budget of juvenile cobia (Rachycentron canadum) relative to feed type and ration level,AQUACULTURE,2006,259(40547):211-221
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