Effects of dietary levels of protein on growth, feed utilization and physiological parameters for juvenile Dabry's sturgeon,<i>Acipenser dabryanus</i>

Li, Qingfei; Lu, Xuebao; Liang, Huamin; Ai, Qinghui; Mai, Kangsen

doi:10.1111/are.13656

Cited by 8 publications

(6 citation statements)

References 51 publications

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“…The results of this study showed that the 100% survival of C. mongolicus fingerlings, indicating an adaptation to a wide range of dietary protein levels. These findings are similar to these of previous studies on Brazilian sardine [8], Rhamdia quelen [13], Nibea diacanthus juveniles [17], Dabry's sturgeon juveniles [54], bluegill sunfish juveniles [55], and juvenile marbled spinefoot rabbit fish [56]. These results suggest that dietary protein levels may not be a determinant factor of the mortality.…”

Section: Growth Performancesupporting

confidence: 90%

“…All data were subjected to one-way analysis of variance (ANOVA) using SPSS 22.0 (SPSS, IL, USA), after checking for the normality and homogeneity, followed by Duncan's multiple comparison analysis to conduct pairwise comparisons. The optimum dietary protein requirement based on the total length and weight-specific growth rate was estimated using broken-line regression analysis (y = L − U × (R − x), y means specific growth rate, x means protein content) [17,54] in Excel 2016. The data were expressed as mean ± SE (standard error).…”

Section: Discussionmentioning

confidence: 99%

“…In a recent study, found that serum lysozyme activity in juvenile sturgeon increased with the increasing dietary protein levels but declined when fish were fed excessive protein [54]. In a similar study on grass carp, the optimal dietary protein levels increased the lysozyme activity, but decreased the MDA concentration [72].…”

Section: Immunological Effects Of Dietary Protein Levelsmentioning

confidence: 93%

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Effect of dietary protein levels on the growth, enzyme activity, and immunological status of Culter mongolicus fingerlings

et al. 2022

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A 65-day growth trial was conducted to investigate the dietary protein requirements for Culter mongolicus fingerlings. Isolipidic and isoenergetic diets were formulated with five dietary protein levels (32%, 37%, 42%, 47%, and 52%). Each diet was assigned to triplicate groups of 70 C. mongolicus fingerlings (0.99±0.08 g). The results indicated that weight gain and specific growth rate (SGR) increased with increasing dietary protein levels up to 47%. The activities of intestinal trypsin and lipase were the lowest in the 32% protein and 52% protein groups, while amylase activity reduced markedly in the 47% protein group. These results suggest that different dietary protein levels may cause different transformations of nutrients. The activities of superoxide dismutase (SOD) and lysozyme were not affected by varying dietary protein levels, except for those in the 32% protein group. In contrast, the content of malondialdehyde (MDA) increased with increasing dietary protein levels and reaching a maximum in the 52% protein group, suggesting that MDA accumulation depends on the protein concentration and the potential oxidative stress. Taken together, based on the broken-line analysis of SGR, we recommended the optimum dietary protein for C. mongolicus fingerlings to be 48.97%~49.31%.

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Section: Growth Performancesupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Section: Immunological Effects Of Dietary Protein Levelsmentioning

confidence: 93%

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Effect of dietary protein levels on the growth, enzyme activity, and immunological status of Culter mongolicus fingerlings

et al. 2022

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“…Much effort has been carried out to support the recovery of this endangered species, including the legislation of fishing ban, construction of natural reserve, controlled reproduction and restocking of cultured juveniles (Fan et al, 2006; Zhang et al, 2011). In particular, artificial propagation and release have been recommended as an effective approach to recruit wild populations (Li et al, 2018). However, the immature technology of large‐scale seedling cultivation of Dabry's sturgeon results in a small number of fish that can be released and a low speed of establishment of the artificial population echelon, which limits the scale of release and increases the difficulties in their protection.…”

Section: Introductionmentioning

confidence: 99%

Effect of feeding frequency on growth performance, feed transit and digestive enzyme activity of Acipenser dabryanus juveniles

Guan

Zhang

Sun

et al. 2022

Aquaculture Research

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Dabry's sturgeon (Acipenser dabryanus) is critically endangered in China. However, the lack of research on the feeding strategy of this species is detrimental to its conservation management. The present study evaluated the effects of feeding frequency (1, 2, 3, 4 and 5 times per day) on the growth performance, feed transit and digestive enzyme activity of juvenile Dabry's sturgeons (initial weight 0.42 ± 0.09 g) in a continuous flow culture system at a water temperature of 18.2–18.5°C. Single‐meal and normal‐feeding (1, 2, 3, 4 and 5 times per day) experimental methods were adopted to assess the effect of different feeding frequencies on feed transit. The fish in each treatment of the normal‐feeding experiment were fed normally according to the original feeding frequency (1, 2, 3, 4 and 5 times per day). The optimum feeding frequency for juvenile Dabry's sturgeons was determined to be 4 times per day based on the growth performance, feed conversion rate and digestive enzyme activity. The results of the single‐meal experiment demonstrated that changes in daily feeding frequency modified residence time in the stomach (S1–S5: 27.2–10.4 h) and intestine (S2–S5: range from 14 to 29.85 h). However, the obtained gastric emptying time varied significantly depending on the experimental approach. The single‐meal experiment approach resulted in a longer gastric emptying time of fish fed 1 and 2 times per day (S1: >35 h; S2: 35 h) than those in the normal‐feeding experiment (N1: 16 h; N2: 24 h), demonstrating that the single‐meal method might change the gastrointestinal emptying strategy of fish. Furthermore, the digestive enzyme activity had daily rhythmic changes and the average digestive enzyme activity was affected by feeding frequency. The average digestive enzyme activity of the fish in N3 or N4 was higher than those of fish in other groups (p < 0.05). In summary, this study provides much useful information for the healthy farming of juvenile Dabry's sturgeons and towards the understanding of digestive physiology, which is of great significance for the protection of Dabry's sturgeon.

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“…As a result, Acipenser dabryanus are nowadays commonly fed on commercial pellets designed for farmed sturgeon species, for example, hybrid sturgeon. Our previous study has determined the optimum dietary protein level for the Yangtze sturgeon with reported values of 44.6% for juveniles up to 300 g (Li et al, 2018). As with protein, the lipid is another important macronutrient in the diet, which provides essential fatty acids, phospholipids, sterols, fat‐soluble vitamins and carotenoids for maintaining not only rapid somatic growth but also normal cell structure and function (Opstvedt, 1997).…”

Section: Introductionmentioning

confidence: 99%

Dietary lipid affects growth, feed utilization, liver histology and physiological biochemistry of juvenile Yangtze sturgeon, Acipenser dabryanus , an endangered sturgeon in the Yangtze River

et al. 2022

Aquaculture Research

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The supply of a balanced portion of nutrition is vital for the success of the restocking program of the Yangtze sturgeon, an endangered sturgeon in the Yangtze River, however, knowledge of the nutritional requirement of this endangered species is scarce. The present study was performed to investigate the optimum dietary lipid requirement of the Yangtze sturgeon juveniles (initial weight, 184.24 ± 6.79 g). Five isonitrogenous diets containing a mixture of fish oil and soybean oil (1:1 ratio) at five different levels (35, 63, 90, 124 and 168 g/kg) were prepared and each prescribed diet was hand‐fed to triplicate groups of fish for 50 days. Results showed that feed intake of fish was not affected, but growth and feed utilization rate increased and then declined with the increment of dietary lipid content. Similar trends were observed for the activities of enzymes involved in lipid digestion and metabolism. The lipid content of fish dorsal muscle and liver together with serum triglyceride content was linearly elevated with increasing inclusion of dietary lipid. The inclusion of 12.4% dietary lipid significantly reduced the content of deamination product ammonia in serum. Excessive lipid intake caused noticeable hepatocellular vacuolation as shown by histological staining. Based on the regression analysis between growth response and dietary lipid levels, the optimum dietary lipid level of juvenile Yangtze sturgeon was estimated to be 141.67 g/kg diet.

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Effects of dietary levels of protein on growth, feed utilization and physiological parameters for juvenile Dabry's sturgeon,Acipenser dabryanus

Cited by 8 publications

References 51 publications

Effect of dietary protein levels on the growth, enzyme activity, and immunological status of Culter mongolicus fingerlings

Effect of dietary protein levels on the growth, enzyme activity, and immunological status of Culter mongolicus fingerlings

Effect of feeding frequency on growth performance, feed transit and digestive enzyme activity of Acipenser dabryanus juveniles

Dietary lipid affects growth, feed utilization, liver histology and physiological biochemistry of juvenile Yangtze sturgeon, Acipenser dabryanus , an endangered sturgeon in the Yangtze River

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