Effects of dietary β-carotene levels on growth and liver vitamin A concentrations of the soft-shelled turtle, Pelodiscus sinensis (Wiegmann)

Chen, Li‐Pin; Huang, Chen‐Huei

doi:10.1111/j.1365-2109.2010.02788.x

Cited by 13 publications

(11 citation statements)

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“…Carotenoids might have a positive effect on growth of most of shrimp species and some of fish species mainly during the first developmental stages. In our knowledge, there are few reports published for the effect of carotenoid on aquatic reptile except for recent study of Chen & Huang (), in which β‐carotene has increased the growth of juvenile soft‐shelled turtles. The results of the present study also showed the growth promotion of lutein on hatchling soft‐shelled turtles.…”

Section: Discussionmentioning

confidence: 99%

“…Almost all animals are able to enzymatically convert carotenoids into vitamin A (Gross 1991). Soft-shelled turtles are also capable of converting b-carotene to vitamin A (Chen & Huang 2011). It has been also reported that lutein can be converted to vitamin A in several freshwater fish (Li et al 2011), while the ability of converting lutein into vitamin A in turtles is still undiscovered.…”

Section: )mentioning

confidence: 99%

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Efficacy and tolerance of lutein as colourant in diet of juvenile soft-shelled turtlePelodiscus sinensis

et al. 2013

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The effects of dietary supplementation of lutein on the growth, haematological profile and pigmentation in target tissues of the soft-shelled turtles were investigated. Five experimental diets were prepared with lutein levels at 1.16 (D1, control), 70.3 (D2), 132 (D3) and 239 (D4) mg kg À1 , and one more high inclusion level of 3410 mg kg À1 (D5) was included for tolerance test. Each diet was fed to 24 juvenile turtles for 8w. Specific growth rate (SGR) in D2, D3 and D4 was significantly higher than that of group D1 and D5. Skin yellowness (b*) and chroma (C*) of both carapace and plastron skin were all significantly increased with higher dietary lutein levels. Dietary lutein supplementation turned the H°values of skins into yellowness. The accumulation of lutein in skin and muscle also augmented significantly with increasing lutein levels and fit a logarithmic correlation with dietary lutein levels. There were almost no differences in haematological parameters of all turtles. Lutein is an efficient and safe colourant in diet of soft-shelled turtle. The optimal inclusion levels for the highest SGR and desired skin colour in carapace and plastron of soft-shelled turtle were 162, 142 and 143 mg kg À1 , respectively.

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Section: Discussionmentioning

confidence: 99%

Section: )mentioning

confidence: 99%

Efficacy and tolerance of lutein as colourant in diet of juvenile soft-shelled turtlePelodiscus sinensis

et al. 2013

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“…Estimating dietary requirements based on the dose-response growth is normally performed with a regression modelling (Shearer 2000). Therefore, the WG in soft-shelled turtles did not always show significant differences among treatment levels (Wu & Huang 2008;Chen & Huang 2011). Moreover, There was no significant difference among means AE SE of treatments (n = 17 or 20, P ≥ 0.05).…”

Section: Discussionmentioning

confidence: 99%

“…; Wu & Huang ; Huang et al . ; Chen & Huang ; Huang & Huang ) for eight weeks. Mg sulphate (MgSO 4 ) obtained from Mallinckrodt Baker (Phillipsburg, NJ, USA) was premixed with cellulose and then mixed with regular food ingredients to create a control and six treatment levels with supplementary Mg of 0, 150, 300, 600, 900, 1200 or 1500 mg Mg kg −1 .…”

Section: Methodsmentioning

confidence: 99%

“…Juvenile Chinese soft-shelled turtles were fed a basal diet (Table 1) that meets the dietary requirements for soft-shelled turtles (Chu et al 2007;Wu & Huang 2008;Huang et al 2010;Chen & Huang 2011;Huang & Huang 2012) for eight weeks. Mg sulphate (MgSO 4 ) obtained from Mallinckrodt Baker (Phillipsburg, NJ, USA) was premixed with cellulose and then mixed with regular food ingredients to create a control and six treatment levels with supplementary Mg of 0, 150, 300, 600, 900, 1200 or 1500 mg Mg kg À1 .…”

Section: Methodsmentioning

confidence: 99%

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Effects of dietary magnesium on the growth, carapace strength and tissue magnesium concentrations of soft-shelled turtle,Pelodiscus sinensis(Wiegmann)

Chen

Huang

2013

Aquac Res

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A feeding trial was conducted to evaluate the effects of dietary magnesium on the growth, carapace strength, tissue and serum Mg concentration of soft‐shelled turtles, Pelodiscus sinensis (Wiegmann). Juvenile soft‐shelled turtles of approximate 5.4 g body weight were fed diets with seven levels of Mg (48, 206, 369, 670, 955, 1195 and 1500 mg Mg kg−1) for eight weeks. No significant difference (P ≥ 0.05) was found in weight gain (WG), feed conversion ratio or protein efficiency ratio among treatments. However, the WG of turtles continued to increase with increasing dietary Mg levels up to 670 mg kg−1, beyond which the WG levelled off. The plasma alkaline phosphatase activity and the muscle, bone Mg concentrations of the turtles increased with the increasing dietary Mg levels between 48 and 955 mg kg−1, beyond which the tissue Mg concentrations remained relatively constant. Furthermore, the carapace strengths of turtles fed with the control diet of 48 mg Mg kg−1 were significantly weaker (P < 0.05) than that of turtles fed with diets containing higher Mg levels. Based on a broken‐line modelling analysis, the required dietary Mg level for the optimal WG of juvenile soft‐shelled turtles was estimated to be approximately 650 mg kg−1. By contrast, the required dietary Mg levels for turtles to reach the optimal muscle and bone Mg concentrations were 1050 and 1000 mg kg−1 respectively. The required dietary Mg level for maximal alkaline phosphatase activity was approximately 980 mg kg−1.

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Effects of Dietary Xanthophyll Supplementation on Growth Performance, Body Color, Carotenoids, and Blood Chemistry Indices of Chinese Soft‐Shelled Turtle Pelodiscus sinensis

Wang

et al. 2020

N American J Aquac

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A 12-week experiment was conducted to investigate the effects of diets containing 0 (CD), 40 (X1), 80 (X2), and 120 mg/kg (X3) xanthophyll on the growth, body color, and blood chemistry of the Chinese soft-shelled turtle Pelodiscus sinensis. Four hundred and eighty turtles with initial weight of 37.90 AE 0.26 g were randomly stocked equally in 12 cement ponds (4.0 × 5.0 × 0.8 m) to form four groups in triplicate. The turtles were fed one of the four diets (crude protein 48%, crude lipid 6%) twice daily, with the feed amount set at 3% of their total body weight. The results indicated that the supplement of 80 mg/kg xanthophyll in the diet had the most significant effect on growth, feed conversion ratio, and amino acid content in muscle tissue. The yellowness of the carapace and the plastron skin increased with higher xanthophyll levels. Moreover, the final yellowness in the plastron skin was higher than the initial yellowness. The carotenoid content in the liver and carapace was significantly enhanced with increasing xanthophyll levels and showed a significant linear correlation with the dietary xanthophyll supplement levels. The liver carotenoid content in the X2 and X3 groups and carapace skin carotenoid content in the X3 group were markedly higher than were those in turtles that were fed the control diet (P < 0.05). Compared with the control diet, adding xanthophyll significantly increased acid phosphatase activity in serum while obviously lowering the alanine aminotransferase activity. The triglyceride and total cholesterol content decreased with increases in xanthophyll. There were no significant differences in the serum superoxide dismutase and glutathione peroxidase activity in animals that received the xanthophyll-supplemented and control diets. The current study results suggest that the growth performance and skin coloration of Chinese soft-shelled turtle can be improved by including 80-120 mg/kg xanthophyll in the diet.

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Effects of dietary β-carotene levels on growth and liver vitamin A concentrations of the soft-shelled turtle, Pelodiscus sinensis (Wiegmann)

Cited by 13 publications

References 35 publications

Efficacy and tolerance of lutein as colourant in diet of juvenile soft-shelled turtlePelodiscus sinensis

Efficacy and tolerance of lutein as colourant in diet of juvenile soft-shelled turtlePelodiscus sinensis

Effects of dietary magnesium on the growth, carapace strength and tissue magnesium concentrations of soft-shelled turtle,Pelodiscus sinensis(Wiegmann)

Effects of Dietary Xanthophyll Supplementation on Growth Performance, Body Color, Carotenoids, and Blood Chemistry Indices of Chinese Soft‐Shelled Turtle Pelodiscus sinensis

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