Abstract

Analysis of fish waste silage with formic acid and dietary applications on aquatic organisms are presented. We analyzed the chemical composition and physicochemical transformation during ensiling as well as the nourishing effect on juveniles of two species of shrimp (Litopenaeus vannamei and Farfantepenaeus durorarum) and octopus Octopus maya. Values between 52 - 59% and 14 - 32% proteins and lipids, respectively, are observed in fish waste silage. There was a loss of tryptophan by 24% during ensiling. A pH between 3.6 and 4.0 after 48 h there is a high degree of protein hydrolysis. The addition of BHT reduces oxidation. The combination of silage and vegetable protein (soy) in a 1:1 and 1:3 in diets for L. vannamei and F. duorarum resulted in higher growth and proteolytic activity compared to responses in organisms without soy protein. For juveniles of octopus O. maya, the inclusion of silage in the diet, allow growth similar to those obtained with fresh food in the first 30 days. The combination of solubilized protein from ensiled with vegetable protein from soy is beneficial when incorporated in diets for shrimp and only for the early development of the octopus O. maya