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Wen-bin Liu - One of the best experts on this subject based on the ideXlab platform.
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Optimum Feeding Frequency of juvenile blunt snout bream Megalobrama amblycephala
Aquaculture, 2015Co-Authors: Hong-yan Tian, Ding-dong Zhang, Chun-nuan Zhang, Yu Qian, Wen-bin LiuAbstract:Abstract An 8-week experiment was conducted to determine the optimal Feeding Frequency of juvenile blunt snout bream Megalobrama amblycephala. Fish (8.87 ± 0.03 g) were randomly assigned to one of six Feeding frequencies (1, 2, 3, 4, 5 and 6 times daily) and hand-fed at 8% of the biomass per day for the first 4 weeks and 6% for the remaining 4 weeks. The results showed that maximum final weight (29.75 ± 0.73 g) and weight gain (20.86 ± 0.77 g) was observed in fish fed 3 times daily. Whole-body lipid content increased significantly (P
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Feeding Frequency affects stress innate immunity and disease resistance of juvenile blunt snout bream megalobrama amblycephala
Fish & Shellfish Immunology, 2014Co-Authors: Hong-yan Tian, Ding-dong Zhang, Guangzhen Jiang, Wen-bin LiuAbstract:This study aimed to evaluate the effects of Feeding Frequency on stress, innate immunity and disease resistance of juvenile blunt snout bream Megalobrama amblycephala (average weight: 9.92 ± 0.06 g). Fish were randomly assigned to one of six Feeding frequencies (1, 2, 3, 4, 5 and 6 times/day) following the same ration size for 8 weeks. After the Feeding trial, fish were challenged by Aeromonas hydrophila and cumulative mortality was recorded for the next 10 days. Daily gain index of fish fed 3–5 times/day was significantly higher than that of the other groups. High Feeding frequencies induced significantly elevated plasma levels of both cortisol and lactate. Fish fed 3–4 times/day exhibited relatively low liver catalase and glutathione peroxidase activities as well as malondialdehyde contents, but obtained significantly higher reduced glutathione levels and post-challenged haemato-immunological parameters (include blood leukocyte and erythrocyte counts as well as plasma lysozyme, alternative complement, acid phosphatase and myeloperoxidase activities) compared with that of the other groups. After challenge, the lowest mortality was observed in fish fed 4 times/day. It was significantly lower than that of fish fed 1–3 times/day, but exhibited no statistical difference with that of the other groups. In conclusion, both low and high Feeding frequencies could cause oxidative stress of juvenile M. amblycephala, as might consequently lead to the depressed immunity and reduced resistance to A. hydrophila infection. The optimal Feeding Frequency to enhance growth and boost immunity of this species at juvenile stage is 4 times/day.
Hong-yan Tian - One of the best experts on this subject based on the ideXlab platform.
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Optimum Feeding Frequency of juvenile blunt snout bream Megalobrama amblycephala
Aquaculture, 2015Co-Authors: Hong-yan Tian, Ding-dong Zhang, Chun-nuan Zhang, Yu Qian, Wen-bin LiuAbstract:Abstract An 8-week experiment was conducted to determine the optimal Feeding Frequency of juvenile blunt snout bream Megalobrama amblycephala. Fish (8.87 ± 0.03 g) were randomly assigned to one of six Feeding frequencies (1, 2, 3, 4, 5 and 6 times daily) and hand-fed at 8% of the biomass per day for the first 4 weeks and 6% for the remaining 4 weeks. The results showed that maximum final weight (29.75 ± 0.73 g) and weight gain (20.86 ± 0.77 g) was observed in fish fed 3 times daily. Whole-body lipid content increased significantly (P
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Feeding Frequency affects stress innate immunity and disease resistance of juvenile blunt snout bream megalobrama amblycephala
Fish & Shellfish Immunology, 2014Co-Authors: Hong-yan Tian, Ding-dong Zhang, Guangzhen Jiang, Wen-bin LiuAbstract:This study aimed to evaluate the effects of Feeding Frequency on stress, innate immunity and disease resistance of juvenile blunt snout bream Megalobrama amblycephala (average weight: 9.92 ± 0.06 g). Fish were randomly assigned to one of six Feeding frequencies (1, 2, 3, 4, 5 and 6 times/day) following the same ration size for 8 weeks. After the Feeding trial, fish were challenged by Aeromonas hydrophila and cumulative mortality was recorded for the next 10 days. Daily gain index of fish fed 3–5 times/day was significantly higher than that of the other groups. High Feeding frequencies induced significantly elevated plasma levels of both cortisol and lactate. Fish fed 3–4 times/day exhibited relatively low liver catalase and glutathione peroxidase activities as well as malondialdehyde contents, but obtained significantly higher reduced glutathione levels and post-challenged haemato-immunological parameters (include blood leukocyte and erythrocyte counts as well as plasma lysozyme, alternative complement, acid phosphatase and myeloperoxidase activities) compared with that of the other groups. After challenge, the lowest mortality was observed in fish fed 4 times/day. It was significantly lower than that of fish fed 1–3 times/day, but exhibited no statistical difference with that of the other groups. In conclusion, both low and high Feeding frequencies could cause oxidative stress of juvenile M. amblycephala, as might consequently lead to the depressed immunity and reduced resistance to A. hydrophila infection. The optimal Feeding Frequency to enhance growth and boost immunity of this species at juvenile stage is 4 times/day.
Samuel K Baidoo - One of the best experts on this subject based on the ideXlab platform.
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effect of Feeding Frequency and sow parity based on isocaloric intake during gestation on sow performance
Journal of Animal Science, 2019Co-Authors: Hayford Manu, Suhyup Lee, P Ren, D Pangeni, X Yang, Samuel K BaidooAbstract:The aim of this study was to investigate the effect of Feeding Frequency and sow parity based on same rate of maintenance energy intake during gestation on sow performance. One hundred and seventy-seven sows [Topigs Norsvin 70, Landrace × Large White, Topigs Norsvin USA, Burnsville, MN; parity 3.80 ± 0.16; initial BW = 211.34 ± 3.37 kg; backfat (BF) 13.57 ± 0.54 mm] were blocked by parity, balanced for BW, and randomly assigned to 1 of 3 treatments in a randomized complete block design. Treatments included sows fed corn-soybean meal-based diet 1× daily at 0730 h (control, T1), 2× daily [half ration at 0730 and 1530 h (T2)], or 3× daily [a third portion at 0730, 1130, and 1530 h (T3)], with daily feed quantity kept at 1.25 × maintenance energy intake [100 × (BW)0.75] kcal ME/d. Treatments were imposed from day 30 of gestation. Sows received on average 6,921, 7,129, and 7,399 kcal ME/d from days 30 to 60, days 61 to 90, days 91 to 109 of gestation, respectively. Feeding Frequency during gestation had no effect on lactation ADFI (P > 0.10). Sows fed 3× daily during gestation had improved lactation G:F (P = 0.040) compared with sows fed 2× but similar to control sows (P = 0.338). Treatment did not alter BW or BW variations during gestation, lactation, or from days 30 to wean (P > 0.10). Sows fed 2× daily had tendency to gain BF from day 30 to day 109 of gestation (P = 0.053) but tended to lose BF during lactation (P = 0.091) relative to the control sows. Feeding Frequency (2× and 3× daily) tended to increase the number of piglets weaned by 0.40 (P = 0.056) and 0.53 (P = 0.098) piglets, respectively, compared with control sows. Sows fed 2× daily during gestation had reduced number of stillborn relative to control sows (P = 0.035). From day 30 to wean, gilts had propensity to lose BF relative to P1+ (P = 0.094), but lost BF compared with P3+ and P6+ sows (P = 0.003). Parity P6+ sows had highest percentage of both 72 h and preweaning piglet mortality than P0, P1+, and P3+ sows (P < 0.05). In conclusion, parity (P6+) had greater lactation BW gain but higher mortalities relative to lower parity sows. Sows fed 2× daily tended to gain BF from days 30 to 109 of gestation and had reduced number of stillborn relative to control sows. It appears that increasing gestation sow Feeding Frequency from 1× daily to 2× and 3× daily may reduce the number of stillborn and increase litter size at weaning although most of the reproductive traits were not affected.
Ding-dong Zhang - One of the best experts on this subject based on the ideXlab platform.
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Optimum Feeding Frequency of juvenile blunt snout bream Megalobrama amblycephala
Aquaculture, 2015Co-Authors: Hong-yan Tian, Ding-dong Zhang, Chun-nuan Zhang, Yu Qian, Wen-bin LiuAbstract:Abstract An 8-week experiment was conducted to determine the optimal Feeding Frequency of juvenile blunt snout bream Megalobrama amblycephala. Fish (8.87 ± 0.03 g) were randomly assigned to one of six Feeding frequencies (1, 2, 3, 4, 5 and 6 times daily) and hand-fed at 8% of the biomass per day for the first 4 weeks and 6% for the remaining 4 weeks. The results showed that maximum final weight (29.75 ± 0.73 g) and weight gain (20.86 ± 0.77 g) was observed in fish fed 3 times daily. Whole-body lipid content increased significantly (P
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Feeding Frequency affects stress innate immunity and disease resistance of juvenile blunt snout bream megalobrama amblycephala
Fish & Shellfish Immunology, 2014Co-Authors: Hong-yan Tian, Ding-dong Zhang, Guangzhen Jiang, Wen-bin LiuAbstract:This study aimed to evaluate the effects of Feeding Frequency on stress, innate immunity and disease resistance of juvenile blunt snout bream Megalobrama amblycephala (average weight: 9.92 ± 0.06 g). Fish were randomly assigned to one of six Feeding frequencies (1, 2, 3, 4, 5 and 6 times/day) following the same ration size for 8 weeks. After the Feeding trial, fish were challenged by Aeromonas hydrophila and cumulative mortality was recorded for the next 10 days. Daily gain index of fish fed 3–5 times/day was significantly higher than that of the other groups. High Feeding frequencies induced significantly elevated plasma levels of both cortisol and lactate. Fish fed 3–4 times/day exhibited relatively low liver catalase and glutathione peroxidase activities as well as malondialdehyde contents, but obtained significantly higher reduced glutathione levels and post-challenged haemato-immunological parameters (include blood leukocyte and erythrocyte counts as well as plasma lysozyme, alternative complement, acid phosphatase and myeloperoxidase activities) compared with that of the other groups. After challenge, the lowest mortality was observed in fish fed 4 times/day. It was significantly lower than that of fish fed 1–3 times/day, but exhibited no statistical difference with that of the other groups. In conclusion, both low and high Feeding frequencies could cause oxidative stress of juvenile M. amblycephala, as might consequently lead to the depressed immunity and reduced resistance to A. hydrophila infection. The optimal Feeding Frequency to enhance growth and boost immunity of this species at juvenile stage is 4 times/day.
Frank L Castille - One of the best experts on this subject based on the ideXlab platform.
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effect of variations in daily Feeding Frequency and ration size on growth of shrimp litopenaeus vannamei boone in zero water exchange culture tanks
Aquaculture, 1999Co-Authors: Mario Velasco, Addison L Lawrence, Frank L CastilleAbstract:It is generally believed that increasing Feeding Frequency has immediate benefits, including reduced nutrient leaching and increased shrimp growth. In this study, static-water ecoassays were conducted to determine the effect of Feeding Frequency and percentage of daily ration on growth of Litopenaeus vannamei and accumulation of inorganic nitrogen and phosphorus in the culture water. Shrimp were fed a semi-purified diet containing 19.5% crude protein. Experiment 1 tested five Feeding frequencies (3, 5, 8, 11 and 15 Feedings day -1 ) evenly spaced in time during 24 h. Daily ration was divided in similar amounts for each Feeding Frequency. Mean shrimp survival was 98.6% for all treatments. No significant differences were found either on shrimp growth or accumulation of total inorganic nitrogen (TIN) or total reactive phosphorus (TRP) regardless of Feeding Frequency. In experiment 2 daily rations were offered manually 1 (100% at 0800 h), 2 (50% each at 0800 and 2000 h), 3 (33% each at 0800, 1400 and 2000 h), 3 + (45, 20 and 35% at 0800, 1400 and 2000 h, respectively), 4 (25% each at 0800, 1200, 1600 and 2000 h), 4 + (40, 15, 15 and 30% at 0800, 1200, 1600 and 2000 h, respectively) and 6 (16.6% each at 0800, 1030, 1300, 1600, 1800 and 2000 h) times day -1 ; and with automatic feeders 15 times day 1 (every 96 min). Shrimp survival was 100% for all treatments. Although mean shrimp growth was highest at 2 Feedings day no significant differences were found among Feeding treatments. Accumulation of TIN in the culture water was significantly lower for tanks receiving feed 2 times day -1 compared to I and 3 times day -1 . Levels of TIN were not significantly different among the other Feeding treatments. Accumulation of TRP was not significantly different regardless of Feeding treatment. These data indicated that under these culture conditions increasing Feeding Frequency or manipulating ration size did not significantly improve shrimp survival or growth. The only significant environmental effect detected in the culture water was a reduction of TIN at a Feeding Frequency of 2 compared to 1 and 3 times day -1 in experiment 2. The authors suggest that multiple Feedings may not be advantageous for some static culture systems, and that the cost-effectiveness of multiple Feedings be evaluated for different feeds and culture systems.
