Compared to fish oil alone, a corn and fish oil mixture decreases the lipid requirement of a freshwater fish species, Carassius auratus gibelio

Zhou, Junyu; Han, Dong; Jin, Junyan; Xie, Shouqi; Yang, Yunxia; Zhu, Xiaoming

doi:10.1016/j.aquaculture.2014.03.029

Cited by 24 publications

(19 citation statements)

References 37 publications

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“…We also speculate that loach have a low capacity to utilize lipid. The finding is consistent with several previous studies (Ghanawi, Roy, Davis & Saoud, ; Zhou et al., ) working on freshwater fish, where excessive dietary lipid levels would result in deposition in tissues. Generally, fatty acid compositions of viscera loach were reflected by dietary fatty acid compositions.…”

Section: Discussionsupporting

confidence: 93%

Effects of dietary protein and lipid levels on growth performance, fatty acid composition and antioxidant-related gene expressions in juvenile loachMisgurnus anguillicaudatus

Yan

Liang

et al. 2017

Aquac Res

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Dojo loach (Misgurnus anguillicaudatus) is one of the most important cultured freshwater fish in several East Asian countries. However, a little information is available in its nutritional requirements. Thus, this study was conducted to evaluate the effects of feeding varying levels of dietary protein and lipid on growth, fatty acid composition and antioxidant‐related gene expressions in juvenile loach. Six practical diets at three levels of protein (30%, 40% and 50%) and two levels of lipid (6% and 12%) were fed to loach juveniles (initial weight 0.40 g) in triplicated groups (20 fish per replicated) for a period of 8 weeks. Results showed that regardless of lipid level, body weight gain of fish was significantly increased with incremental dietary protein level. Meanwhile, feed conversion ratio was significantly decreased by dietary protein levels, and the lowest value was observed in fish fed dietary protein levels of 50%, regardless of dietary lipid level. Moreover, the percentage of 22:6n‐3 in viscera was significantly increased by different protein levels. The expression level of catalase was significantly increased with incremental dietary protein level with both lipid levels. Meanwhile, the expression level of hepatic nuclear factor erythroid 2‐related factor 2 (Nrf2) was downregulated with incremental dietary protein level with 6% of lipid level, but the expression was upregulated with incremental dietary protein level with 12% of lipid level. In conclusion, these data suggested that 6% lipid and 50% protein in diet was optimal for loach during early development stage.

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Section: Discussionsupporting

confidence: 93%

Effects of dietary protein and lipid levels on growth performance, fatty acid composition and antioxidant-related gene expressions in juvenile loachMisgurnus anguillicaudatus

Yan

Liang

et al. 2017

Aquac Res

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“…Perhaps the effect of dietary phosphorus on lipid metabolism could explain the reductions in triglyceride contents in the present study (Shao et al., ). When dietary phosphorus was low, gibel carp cannot utilize lipid as energy, so after intake of lipid, it was transferred in blood and stored in viscera and muscle (Zhou et al., ), when phosphorus was enough it was oxidized instead of being transferred in blood.…”

Section: Discussionmentioning

confidence: 99%

Dietary available phosphorus requirement for juvenile gibel carp (Carassius auratus gibeliovar. CASIII)

et al. 2017

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A 57-day growth experiment was conducted with juvenile gibel carp (13.48 AE 0.10 g) in a flow-through system to study the effect of dietary phosphorus on growth performance, body composition, nutrition utilization, phosphorus loading and enzymes activities. Seven semipurifed diets were formulated to contain 0.07 (the basal), 2. 27, 5.32, 8.10, 12.06, 15.24 and 19.48 g available phosphorus/kg diet.The results showed that specific growth rate, body length and feed efficiency significantly increased in the fish fed diets containing 0.07 to 15.24 g available P/kg diet (p < .05). Ash and P content increased in fish fed diets containing 0.07-12.06 P g/kg (p < .05) and then levelled off, while moisture, crude protein and lipid had no significant difference (p > .05). The protein retention efficiency increased in the fish fed with diets 0.07-5.32 g/kg P (p < .05) and then reached a plateau. The P content in faeces was higher in fish fed diets containing 15.24 and 19.48 g available P/kg. Total P concentration in tank water increased in fish fed 0.07-12.06 g available P per kg diet (p < .05). The plasma P was higher in the fish fed with 15.24 g available P/kg diet (p < .05), triglycerides was lower in the fish fed diet containing 15.24 and 19.48 g available P/kg (p < .05), no significant differences were observed in plasma Ca, plasma glucose and calcitonin (p > .05). Based on SGR, whole body P content and FE, dietary available P requirement for juvenile gibel carp were 13.37, 13.97 g/kg and 15.06 respectively. K E Y W O R D S growth performance, juvenile gibel carp, nutrition utilization, P loading, phosphorus wileyonlinelibrary.com/journal/are Aquaculture Research. 2018;49:1284-1292.

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“…Quantitative real‐time PCR was applied to evaluate the mRNA levels of FAS and ACC in the hepatopancreas using β‐actin as a reference gene. The primers used were those previously described (Zhou et al., ). Quantitative real‐time PCR was performed according to the instructions provided in the fluorescence quantitative PCR kit for the ABI PRISM 7500 HT sequence detection system (Applied Biosystems, Carlsbad, California) and reactions were performed using the SYBR Green PCR Master Mix (Takara, Dalian, China).…”

Section: Methodsmentioning

confidence: 99%

Effects of dietary betaine in allogynogenetic gibel carp (Carassius auratus gibelio): Enhanced growth, reduced lipid deposition and depressed lipogenic gene expression

et al. 2018

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A 10‐week feeding experiment was conducted to evaluate the effects of supplemental betaine on growth performance, body composition and lipid deposition in allogynogenetic gibel carp. Four isoproteic (37% crude protein) and isolipidic (5% crude lipid) artificial diets with 0%, 0.08%, 0.4% and 2% betaine supplementation were formulated, and named VB0, VB0.08, VB0.4 and VB2, respectively. Each diet was fed in triplicate to fish about 10 g in weight. The results showed that 0.4% betaine supplementation significantly improved growth performance and reduced lipid content in the hepatopancreas, muscle and the whole body compared with the control group. Moreover, both fatty acid synthase and acetyl‐CoA carboxylase, two important lipogenic genes, showed significantly lower expression in the VB0.4 group than in the control group, and a strong correlation was detected between lipid content and mRNA expression levels for FAS and ACC in the hepatopancreas. Taken together, appropriate (0.4%) betaine supplementation in the diet not only improved growth, but also reduced lipid deposition in allogynogenetic gibel carp, probably by diminishing lipogenic gene expression.

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Compared to fish oil alone, a corn and fish oil mixture decreases the lipid requirement of a freshwater fish species, Carassius auratus gibelio

Cited by 24 publications

References 37 publications

Effects of dietary protein and lipid levels on growth performance, fatty acid composition and antioxidant-related gene expressions in juvenile loachMisgurnus anguillicaudatus

Effects of dietary protein and lipid levels on growth performance, fatty acid composition and antioxidant-related gene expressions in juvenile loachMisgurnus anguillicaudatus

Dietary available phosphorus requirement for juvenile gibel carp (Carassius auratus gibeliovar. CASIII)

Effects of dietary betaine in allogynogenetic gibel carp (Carassius auratus gibelio): Enhanced growth, reduced lipid deposition and depressed lipogenic gene expression

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