Effect of Altering Linoleic Acid and Linolenic Acid Dietary Ratios on the Performance and Tissue Fatty Acid Profiles of Prawn, Macrobrachium rosenbergii （de Man 1879） Post Larvae  

作　　者：A. M. A. S. Goda M. M. Habashy M. A. Hanafy R. A. Mohamed H. A. Mabrouk T. M. El-Afifi S. A.Nada K. A. Mohamed 

机构地区：[1]Fish Nutrition Laboratory, National Institute of Oceanography and Fisheries （NIOF）, Cairo 23544, Egypt [2]Invertebrate Laboratory, National Institute of Oceanography and Fisheries （NIOF）, Cairo 23544, Egypt [3]Food and Feed Technology Center, Agriculture Research Center, Ministry of Agriculture, Cairo 24135, Egypt [4]Animal Production and Fish Resources Department, Faculty of Agriculture, Suez Canal University, Ismailia 41522, Egypt

出　　处：《Journal of Agricultural Science and Technology(B)》2011年第7期1032-1044,共13页农业科学与技术（B）

摘　　要：A 90-day experiment was conducted to investigate the effects of different dietary linoleic acid （LA; 18：2n-6） and linolenic acid ratios （LNA; 18：3n-3） on growth induces, feed utilization and tissue fatty acid profile of freshwater prawn, Macrobrachium rosenbergii post-larvae （PL）. The experiment was conducted in cubic indoor fiberglass tanks, each holding 700 L in triplicate. Post-larvae with an average weight of 20.8 ± 0.20 mg were stocked at 80 PL m2. Five experimental isocaloric （15.06 MJ kgl digestible energy）, and isonitrogenous （30.45% digestible protein） diets were formulated by blending of soybean oil and linseed oil to containing five dietary LA/LNA ratios （7.80, 2.75, 1.28, 0.65 and 0.30）. The highest survival values were recorded for prawn PL fed diet containing 0.65 LA/LAN ratios. Growth indices of PL significantly increased （P 〈 0.05） with decreased dietary LA/LAN ratios to 0.65. The same trend was observed for the highest （P ≤ 0.05） protein efficiency ratio, protein productive value, fat retention, energy retention and best feed conversion ratio. The total whole tissue polyunsaturated fatty acid composition of M. rosenbergii PL was dominated by LA followed by LAN. Post larvae fed the diets containing higher LA/LNA ratios showed a higher tissue LA/LNA ratio. The obtained findings revealed that fatty acid patterns ofM. rosenbergii PL were influenced by fatty acid profiles of diets. The diet containing 0.65 LA/LNA ratio is recommended to obtaining optimum growth performance and feed utilization for M. rosenbergii PL.

关 键 词：Fatty acids linoleic linolenic Macrobrachium rosenbergii dietary ratio. 

分 类 号：S966.121[农业科学—水产养殖] TS221[农业科学—水产科学]