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Effects of dietary ratio of n-6 to n-3 polyunsaturated fatty acids on immunoglobulins, cytokines, fatty acid composition, and performance of lactating sows and suckling piglets

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Journal of Animal Science and Biotechnology 2013年第2期4卷 137-144页

作者： Wei Yao Jie Li Jun jun Wang Weiliang Zhou Qingbo Wang Rongchang Zhu Fenglai Wang Phil Thacker Ministry of Agriculture Feed Industry Centre State Key Laboratory of Animal Nutrition China Agricultural University Tianjin National Breeding Pig Farm ninghe livestock & fisheries bureau Department of Science University of Saskatchewan

This experiment was conducted to investigate the effects of dietary ratios of n-6：n-3 polyunsaturated fatty acids （PUFA） on the performance of lactating sows and their piglets. Thirty pregnant Landrace sows were assigned to one of three treatments from d 108 of gestation until weaning （26-29 d） and were fed diets containing different ratios of n-6：n-3 PUFA including 3：1,9：1 and 13：1. The effects on sow and litter production traits were examined together with an assessment of sow body condition. No differences were detected among the treatments for the daily feed intake of sows or changes in sow weight and back-fat levels during lactation （P 〉 0.05）. Litter size at d 14 and d 21 were tended to increase in 3：1 treatment compared with 9：1 and 13：1 treatments （P 〈 0.10）. Litter weight gain （1.77 kg/d） from d 0 to d 14 was tended to increase in 9：1 groups compared with the other two treatments （P 〈 0.10）. A significant difference was observed for the content of a -linolenic acid, total n-3 PUFA, and the ratio of n-6：n-3 PUFA in the colostrum, milk, and piglets plasma （P 〈 0.01）. The effects of different ratios of n-6：n-3 PUFA in sow diets on colostrum, milk and piglet plasma immunoglobulin concentrations are studied. No difference was observed among treatments in the concentrations of IgM, and IgA in colostrum （P 〉 0.05）. A great significant difference for IgG concentration was observed among 3 group in colostrum. A great significant difference for IgA, and IgM （P〈 0.01） concentrations in piglet plasma at d14 and a significant difference for IgG（P 〈 0.05） was observed at d14. Furthermore, at d 21 of lactation, piglet plasma IgG and IgA concentration were greater in 3：1 compared with 13：1 group （P 〈 0.01）. In summary, the current study demonstrated that altering the ratio of n-6：n-3 PUFA in lactating sow diet had an effect on the immune component including immunoglobulin and cytokines, and it tended to increase the litter average daily gain and improve the immune status o

关键词： n-6:n-3 polyunsaturated fatty acids Performance Fatty acid composition Immunoglobulin Cytokines

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Effects of hydroxyproline supplementation in low fish meal diets on collagen synthesis, myofiber development and muscular texture of juvenile Pacific white shrimp(Litopenaeus vannamei)

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Animal Nutrition 2024年第2期17卷 428-437页

作者： Menglin Shi Haoming Li Tianyu Chen Bocheng Huang Xiaoyue Li Xiaohui Dong Shuyan Chi Qihui Yang Hongyu Liu Junming Deng Beiping Tan Shuang Zhang Shiwei Xie Laboratory of Aquatic Nutrition and Feed College of Fisheries Guangdong Ocean University Aquatic Animals Precision Nutrition and High-Efficiency Feed Engineering Research Centre of Guangdong Province Key Laboratory of Aquatic Livestock and Poultry Feed Science and Technology in South China Ministry of Agriculture Guangdong Provincial Key Lab of Aquatic Animals Disease Control and Healthy Culture

This experiment aimed to evaluate the impact of dietary hydroxyproline(Hyp) supplementation on the muscle quality of juvenile Pacific white shrimp(Litopenaeus vannamei) fed a low fishmeal diet. Six formulated diets included one high fishmeal(HF; 25% fishmeal content) and five low fishmeal diets(10%fishmeal content) with 0%, 0.2%, 0.4%, 0.6% and 0.8% Hyp(LF0, LF2, LF4, LF6 and LF8, respectively). Each diet was assigned to four replicates, and 40 shrimp(0.32 ± 0.00 g) per replicate were fed four times a day for 8 weeks. Dietary Hyp supplementation had little effects on growth performance, but increased the contents of Hyp, prolyl 4-hydroxylases(P4Hs), and collagen. The meat yield, springiness, hardness,chewiness, and cohesiveness of muscle were the highest in the LF4 group among the low fishmeal groups(P < 0.05). Cooking loss and freezing loss of muscle were the lowest in the LF4 group(P < 0.05). Dietary supplementation with 0.4% Hyp increased the myofiber density and decreased the myofiber diameter of muscle(P < 0.05). Supplementation of Hyp in the diet up-regulated the mRNA expression of smyhc5,smyhc15, col1a1, col1a2, igf-1f, tgf-β and tor and down-regulated the mRNA expression of smyhc1, smyhc2,smyhc6a(P < 0.05). Supplementation of Hyp in the diet up-regulated the protein expression of P-4E-BP1,P-AKT, AKT and P-AKT/AKT(P < 0.05). These results suggested that the addition of 0.4% Hyp to low fishmeal diets improved the muscle quality of L. vannamei.

关键词： Hydroxyproline Collagen Muscle quality Litopenaeus vannamei

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The economic contribution of fish and fish trade in Bangladesh

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Aquaculture and fisheries 2020年第4期5卷 174-181页

作者： MdMostafa Shamsuzzaman Mohammad Mojibul Hoque Mozumder Sabrina Jannat Mitu Abu Faisal Ahamad Md.Sumon Bhyuian Department of Coastal and Marine fisheries Faculty of FisheriesSylhet Agricultural UniversitySylhet3100Bangladesh Helsinki Institute of Sustainability Science(HELSUS) Doctoral Programme in Interdisciplinary Environmental Science(DENVI)Faculty of Biological and Environmental SciencesUniversity of HelsinkiFinland

Bangladesh possesses a large wetland area comprising diversified fisheries *** and fisheries are an integral part of Bangladesh and have earned its importance due to immense export and revenue *** objective of this study was to investigate the trend of fish production,export and import of Bangladesh during the last two *** reviews of the literature were done,numerical data was obtained from the Ministry of fisheries and livestock(MoFL),Department of fisheries(DOF),Bangladesh bureau of Statistics(BBS).The results showed that fish production has increased in Bangladesh during the last two decades,starting from 17.81 lakh metric tons in 2000–01 and reaching up to 41.34 lakh metric tons in 2016–*** to the gradual decline in capture fishery,a significant percentage of total production comes from ***(Tenualosa ilisha)is the largest single-species fishery in Bangladesh which makes the highest contribution to the country's total fish *** of the fish commodity in terms of quantity and value has declined in recent years due to food quality and safety *** study has highlighted the contribution of fisheries production in Bangladesh and trade to the country's *** paying more attention to the fisheries sector,Bangladesh can boost up its economy.

关键词： fisheries resources Inland and marine fisheries Legal issues Export and import SDGs

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