Growth, faecal production, nitrogenous excretion and energy budget of juvenile cobia (Rachycentron canadum) relative to feed type and ration level

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 广东省海洋药物重点实验室

	Growth, faecal production, nitrogenous excretion and energy budget of juvenile cobia (Rachycentron canadum) relative to feed type and ration level
	Sun, LH; Chen, HR; Huang, LM; Wang, ZD; waa-to@163.com
刊名	AQUACULTURE
	2006
卷号	259 期号:40547 页码:211-221
关键词	Juvenile Cobia (Rachycentron Canadum) Feed Type Ration Level Growth Faecal Production Nitrogenous Excretion Energy Budget
ISSN号	0044-8486
英文摘要	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.
学科主题	Fisheries ; Marine & Freshwater Biology
URL标识	查看原文
资助项目	广东省海洋药物重点实验室
WOS记录号	WOS:000240559500025
公开日期	2011-07-03
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/5184]
专题	南海海洋研究所_广东省海洋药物重点实验室
通讯作者	waa-to@163.com
推荐引用方式 GB/T 7714	Sun, LH,Chen, HR,Huang, LM,et al. Growth, faecal production, nitrogenous excretion and energy budget of juvenile cobia (Rachycentron canadum) relative to feed type and ration level[J]. AQUACULTURE,2006,259(40547):211-221.
APA	Sun, LH,Chen, HR,Huang, LM,Wang, ZD,&waa-to@163.com.(2006).Growth, faecal production, nitrogenous excretion and energy budget of juvenile cobia (Rachycentron canadum) relative to feed type and ration level.AQUACULTURE,259(40547),211-221.
MLA	Sun, LH,et al."Growth, faecal production, nitrogenous excretion and energy budget of juvenile cobia (Rachycentron canadum) relative to feed type and ration level".AQUACULTURE 259.40547(2006):211-221.