Effects of the relation energy/protein in the larvas of Coporo (Prochidolus mariae).

In order to determine the effect of the energy relation/protein in Copore larvae ( Prochidolus mariae ), 6 diets formulated with increasing crude protein levels (30, 35 and 40%) and energy were used (2.500 and 3.000 Kcal/ kg). The gain of weight, length overall was registered weekly in the larvae and mortality, through a design completely randomized with a factorial adjustment 2X3 (levels of energy x protein levels) to a meaning level α= 0,05. The weight average and length overall of the units, to the 15 days of culture, was superior (P <0,05) in the protein diet/energy 40/2.500 (17,42 mg and 2,44 cm, respectively). The results of sobreexperience of the copore larvae during the phase of rise did not differ between different diets (P >0,05), varying from 94 to 99%. The chemical parameters physical of quality of water stayed constants. When the energy relation is analyzed/protein of 2.500Kcal/kg/40% and 3.000Kcal/kg/40% is observed better answers the lowest value of energy, possibly due to the smaller requirement of energy of the species, nevertheless can be due to the contribution of energy by the protein. In the case of the lower power level, part of the protein, can be turned aside to the catabolic metabolism instead of being used for the growth, the results show that the copore larvae require high exigencies, equal or greater of 40% of crude protein in the diet and apparently they do not require more than 2.500 Kcal to make its initial metabolism.