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Effect of body size on growth and energy budget of Nile tilapia, Oreochromis niloticus
Shouqi Xie; Yibo Cui; Yunxia Yang; Jiankang Liu; Xie, SQ, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China
1997
Source PublicationAQUACULTURE
Volume157Issue:1-2Pages:25-34
AbstractA growth trial was conducted at 30 degrees C to investigate the effect of body size on growth and energy budget of Nile tilapia. The average initial body weights of the four size groups tested were 9.3, 34.1, 80.3 and 172.4 g, respectively. Fish were fed to satiation twice a day with a diet containing 35.6% crude protein. Food consumption (C-max: kJ/day) increased with body size (W: g) according to the relationship: Ln C-max = 1.45 + 0.42 LnW. The final body contents of dry matter, crude protein and ash per unit body weight increased with increasing body size while contents of fat and energy were independent of body size. Specific growth rates of wet weight, dry weight, protein and energy decreased as the fish increased in size. Feed efficiencies in wet weigh, dry weight and crude protein decreased with increasing body size, while that of energy remained unchanged. The proportions of energy intake allocated to the various components (faecal energy, excretory energy, heat production and recovered energy) of the energy budget were not significantly affected by body size, and the average budget was: 100IE-18.5(+/- 1.33)FE + 5.9 (+/- 3.09)(ZE + UE) + 49.3(+/- 3.77)HE + 26.3(+/- 6.23)RE, where IE, FE, (ZE + UE), HE and RE represent gross energy intake, faecal energy, excretory (non-faecal) energy loss, heat production and recovered energy (growth), respectively. It is suggested that the decrease in growth rate in larger fish is mainly due to the decrease in relative food intake. (C) 1997 Elsevier Science B.V.
KeywordGrowth Energy Budget Oreochromis Niloticus Body Size
DepartmentChinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China
Subject AreaFisheries ; Marine & Freshwater Biology
Indexed BySCI
WOS IDWOS:000071073000003
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/10244
Collection期刊论文
Corresponding AuthorXie, SQ, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China
Recommended Citation
GB/T 7714
Shouqi Xie,Yibo Cui,Yunxia Yang,et al. Effect of body size on growth and energy budget of Nile tilapia, Oreochromis niloticus[J]. AQUACULTURE,1997,157(1-2):25-34.
APA Shouqi Xie,Yibo Cui,Yunxia Yang,Jiankang Liu,&Xie, SQ, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China.(1997).Effect of body size on growth and energy budget of Nile tilapia, Oreochromis niloticus.AQUACULTURE,157(1-2),25-34.
MLA Shouqi Xie,et al."Effect of body size on growth and energy budget of Nile tilapia, Oreochromis niloticus".AQUACULTURE 157.1-2(1997):25-34.
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