สำนักราชบัณฑิตยสภา

The Journal of the Royal Institute of Thailand Volume II - 2010 Improved Palatability of High Plant Protein Shrimp Feed by the Addition of Betaine/ Amino Acid Mixture 82 feed is formulated in such a way that it would be very low in shrimp natural attractants, and also cheaper to formulate. Three levels of finnstim, i.e. 0%, 0.75%, and 1.5%, were added to the basal diets. This made a total of 6 treatment diets. Each treatment had 3 replications. This amounted to 18 test units in the feeding trials. The test unit for the feeding trials was a circular fiber glass tank with a capacity of 150 liters and a cross–sectional area of 0.3 m 2 . Seawater salinity in these tanks was adjusted to 20 ppt during the first 3 weeks, increased to 30 ppt at the end of the 3 rd week, with a recirculating water system. The test units were located in a hatchery of the Department of Marine Science, Chulalongkorn University, main Bangkok campus. Ten shrimps of 3-4 grams in size were initially stocked in each tank. Table 1. Composition of the two control (basal ) diets. Ingredients Animal Protein* Plant Protein Fish Meal (65 % protein) 27 20 Soybean Meal (45 % protein) 20 40 Shrimp Head (40% protein) 10 - Squid Meal (65% protein) 5 - Soy Lecithin 1 1 Fish Oil 3 3 Wheat Flour 20.3 17.3 Wheat gluten 5 10 Cholesterol 0.2 0.2 Zeolite 1.5 1.5 Di.Ca.P. 1.5 1.5 Potassium phosphate 1 1 Na-hexametaphosphate 1 1 Vitamin Premix 2 2 Na-alginate 1.5 1.5 100% 100% * Generalized Thai shrimp feed.