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Dietary phosphorus requirement of juvenile black seabream, Sparus macrocephalus
Shao, Qingjun1; Ma, Jingjing1; Xu, Zirong1; Hu, Wanglong2; Xu, Junzhuo3; Xie, Shouqi4; Shao, QJ, Zhejiang Univ, Dept Anim Sci, Hangzhou 310029, Peoples R China
2008-05-12
Source PublicationAQUACULTURE
ISSN0044-8486
Volume277Issue:1-2Pages:92-100
AbstractA growth trial was conducted to estimate the optimum requirement of dietary available phosphorus (P) for black seabream (Sparus macrocephalus) in indoor net cages (1.5x1.0x1.0 m). Triplicate groups of black seabream (11.45 +/- 0.02 g) were fed diets containing graded levels (0.18, 0.36, 0.54, 0.72, 0.89 and 1.07%) of available P to satiation for 8 weeks. The basal diet (diet 1), containing 0.18% available P, was supplemented with graded levels of monosodium phosphate (NaH2PO4 2H(2)O) to formulate five experimental diets. The fish were fed twice daily (08:00 h and 16:00 h) and reared in seawater (salinity, 26-29 g l(-1)) at a temperature of 28 +/- 1 degrees C. Dissolved oxygen during the experiment was above 5 mg l(-1). The specific growth rate (SGR), weight gain (WG), feed efficiency (FE) and protein efficiency ratio (PER) were all significantly improved by dietary phosphorus up to 0.54% (P<0.05) and then leveled off beyond this level. Hepatosomatic index (HSI) was inversely correlated with dietary phosphorus levels (P< 0.05). Efficiency of P utilization stabled in fish fed diets containing 0.18%-0.54% available P and then decreased dramatically with further supplementation of dietary phosphorus. Body composition analysis showed that the whole-body lipid, ash, calcium and phosphorus contents were all significantly affected by dietary available P concentration (P<0.05), however, no significance were found in whole-body calcium/phosphorus (Ca/P) ratios among all the treatments (P>0.05). Dietary phosphorus levels also affected the mineralization of vertebrae, skin and scale (P<0.05). Ca/P ratios in vertebrae and scale were not influenced by dietary P supplementation, while skin Ca/P ratio increased statistically with dietary available P levels (quadratic effect, P<0.001). The blood chemistry analysis showed that dietary available P had distinct effects on enzyme activities of alkaline phosphatase (ALP) and plasma lysozyme (LSZ), as well as contents of triacyglycerol (TG) and total cholesterol (T-CHO) (P<0.05). Broken-line analysis showed maximum weight gain (WG) was obtained at dietary available P concentrations of 0.55%. Quadratic analysis based on P contents in whole fish, vertebrae or scale indicated that the requirements were 0.81, 0.87 and 0.88%, respectively. Signs of phosphorus deficiency were characterized by poor growth, slightly reduced mineralization and an increase in body lipid content. (C) 2008 Published by Elsevier B.V.; A growth trial was conducted to estimate the optimum requirement of dietary available phosphorus (P) for black seabream (Sparus macrocephalus) in indoor net cages (1.5x1.0x1.0 m). Triplicate groups of black seabream (11.45 +/- 0.02 g) were fed diets containing graded levels (0.18, 0.36, 0.54, 0.72, 0.89 and 1.07%) of available P to satiation for 8 weeks. The basal diet (diet 1), containing 0.18% available P, was supplemented with graded levels of monosodium phosphate (NaH2PO4 2H(2)O) to formulate five experimental diets. The fish were fed twice daily (08:00 h and 16:00 h) and reared in seawater (salinity, 26-29 g l(-1)) at a temperature of 28 +/- 1 degrees C. Dissolved oxygen during the experiment was above 5 mg l(-1). The specific growth rate (SGR), weight gain (WG), feed efficiency (FE) and protein efficiency ratio (PER) were all significantly improved by dietary phosphorus up to 0.54% (P<0.05) and then leveled off beyond this level. Hepatosomatic index (HSI) was inversely correlated with dietary phosphorus levels (P< 0.05). Efficiency of P utilization stabled in fish fed diets containing 0.18%-0.54% available P and then decreased dramatically with further supplementation of dietary phosphorus. Body composition analysis showed that the whole-body lipid, ash, calcium and phosphorus contents were all significantly affected by dietary available P concentration (P<0.05), however, no significance were found in whole-body calcium/phosphorus (Ca/P) ratios among all the treatments (P>0.05). Dietary phosphorus levels also affected the mineralization of vertebrae, skin and scale (P<0.05). Ca/P ratios in vertebrae and scale were not influenced by dietary P supplementation, while skin Ca/P ratio increased statistically with dietary available P levels (quadratic effect, P<0.001). The blood chemistry analysis showed that dietary available P had distinct effects on enzyme activities of alkaline phosphatase (ALP) and plasma lysozyme (LSZ), as well as contents of triacyglycerol (TG) and total cholesterol (T-CHO) (P<0.05). Broken-line analysis showed maximum weight gain (WG) was obtained at dietary available P concentrations of 0.55%. Quadratic analysis based on P contents in whole fish, vertebrae or scale indicated that the requirements were 0.81, 0.87 and 0.88%, respectively. Signs of phosphorus deficiency were characterized by poor growth, slightly reduced mineralization and an increase in body lipid content. (C) 2008 Published by Elsevier B.V.
SubtypeArticle
KeywordDiet Black Seabream Sparus Macrocephalus Phosphorus Requirement Feeding And Nutrition Mineralization
Department[Shao, Qingjun; Ma, Jingjing; Xu, Zirong] Zhejiang Univ, Dept Anim Sci, Hangzhou 310029, Peoples R China; [Hu, Wanglong] Zhejiang Univ, Dept Life Sci, Hangzhou 310029, Peoples R China; [Xu, Junzhuo] Marine Fisheries Res Inst Zhejiang Prov, Zhoushan 316100, Peoples R China; [Xie, Shouqi] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
Subject AreaFisheries ; Marine & Freshwater Biology
DOI10.1016/j.aquaculture.2008.01.029
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Indexed BySCI
Language英语
WOS Research AreaFisheries ; Marine & Freshwater Biology
WOS SubjectFisheries ; Marine & Freshwater Biology
WOS IDWOS:000255802100013
WOS KeywordTROUT ONCORHYNCHUS-MYKISS ; SALMO-GAIRDNERI RICHARDSON ; COREGONUS-LAVARETUS L. ; RED-SEA BREAM ; RAINBOW-TROUT ; MINERAL REQUIREMENTS ; ATLANTIC SALMON ; ALKALINE-PHOSPHATASE ; ENZYME-ACTIVITIES ; MORONE-SAXATILIS
Citation statistics
Cited Times:92[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/8144
Collection期刊论文
Corresponding AuthorShao, QJ, Zhejiang Univ, Dept Anim Sci, Hangzhou 310029, Peoples R China
Affiliation1.Zhejiang Univ, Dept Anim Sci, Hangzhou 310029, Peoples R China
2.Zhejiang Univ, Dept Life Sci, Hangzhou 310029, Peoples R China
3.Marine Fisheries Res Inst Zhejiang Prov, Zhoushan 316100, Peoples R China
4.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
Shao, Qingjun,Ma, Jingjing,Xu, Zirong,et al. Dietary phosphorus requirement of juvenile black seabream, Sparus macrocephalus[J]. AQUACULTURE,2008,277(1-2):92-100.
APA Shao, Qingjun.,Ma, Jingjing.,Xu, Zirong.,Hu, Wanglong.,Xu, Junzhuo.,...&Shao, QJ, Zhejiang Univ, Dept Anim Sci, Hangzhou 310029, Peoples R China.(2008).Dietary phosphorus requirement of juvenile black seabream, Sparus macrocephalus.AQUACULTURE,277(1-2),92-100.
MLA Shao, Qingjun,et al."Dietary phosphorus requirement of juvenile black seabream, Sparus macrocephalus".AQUACULTURE 277.1-2(2008):92-100.
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