Efecto de dos dietas protéicas en el crecimiento y sobrevivencia de prejuveniles de Atractosteus tropicus Gill 1863 (Pejelagarto)

Abstract

Were evaluated the effect of two protein diets (meat and pork flour) on growth (weight and height) and survival in 300 “pejelagarto” (Atractosteus tropicus) pre-juveniles during 90 days. Control diet was a trout commercial pellet food. The weight, total length, survival, TCA, TCR, ICT, KM, GP and GT, were determined at the end of experiment to determine the effectiveness of two experimental diets with control diet. Organisms feed with meat flour diet obtained the better values of weight (7,325 + 0.384 g) and total length (13.419 + 0.703 cm); as well as better TCA (0.064 weight; 0.063 length), TCR (1.46 weight; 0.59 length), TIC (0.017 weight and 0.006 length). Although control and pork flour diets obtained a better KM values (360 and 365 respectively), these tow diets do not allow to maintain the elongated characteristic of this fish species. The meat flour diet, obtained the highest values of GP (390.29 %) and GT (72.76 %). The lowest values obtained in growth rates and weight and length gains, were shown in pork flour diet. The importance to obtain this information in rural communities, which are intended to make aquaculture projects, with endemic species, consequently they can find local materials to produce diets, not only to obtain a good physiological state in organisms, but length, weight and survival better gain too.