Profit maximization in the substitution of protein sources in the diet of juvenile golden dorado

Fernando Yamamoto, Daniel Yokoyama Sonoda and José Eurico Possebon Cyrino

Revista IPecege, 2017, vol. 3, issue 1

Abstract: Fish-eating fish have high dietary protein requirements and, consequently, diets for these species are among the most expensive on the animal feed market. The objective of this work was to determine the point of maximum profit in replacing fishmeal with soybean meal in diets for the production of juvenile dourado Salminus brasiliensis . Groups of 12 juvenile fish of the species (8.97±0.33g) were stocked in 500 L tanks in a closed-circuit water circulation system in a randomized experimental design (n=4), and fed to apparent satiation in two daily meals for 100 days with extruded isoproteic (39% digestible protein) and isoenergetic (3900 kcal digestible energy) diets, containing gradual levels of fishmeal [FM] replacement with soybean meal [SM] (100% FM, 80% FM, 60% FM, 40% FM, 20% FM, 0% FM). Fish performance indices were analyzed using the profit maximization method, considering the selling prices per kg of dorado (R$ 20.00), SM (R$ 1.14) and FM (R$ 3.50). The percentage of fishmeal in the diets that maximizes profit was 83.51%.

Keywords: Resource/Energy; Economics; and; Policy (search for similar items in EconPapers)
Date: 2017
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