The requirement of digestible energy for females of Rhamdia quelen fed with ration based on vegetal ingredients

Robie Allan Bombardelli, Eduardo Antônio Sanches, Lucélia Tessaro, Alexandre Henrique Buzzi, Cleide Viviane Buzanello Martins, Fábio Meurer


DOI: https://doi.org/10.3856/vol43-issue3-fulltext-18

Abstract


The present experiment was carried out to analyze the growth, the reproduction and the vigor of the offspring from females silver catfish (Rhamdia quelen) fed with ration pelleted containing different levels of digestible energy. The breeders were allocated in tanks under conditions of photoperiod and natural temperature. The fishes were fed for 255 days with isoproteic rations pelleted containing 35% of crude protein (CP) and rising levels of the digestible energy (DE) (2,700; 2,950; 3,200; 3,450; 3,700 kcal of DE.kg of ration-1). The fishes were distributed in a randomized experimental design compounded by five treatments and three repetitions. It was considered as one experimental unity a 16 m2 tank containing six females and three males. The weight and the weight gain were evaluated. During the reproductive season the females were induced to breeding by hormonal manipulation and were evaluated the percentage of spawning females, the total fecundity, relative fecundity (number of oocytes per gram of spawning females), the fertilization ratio, the time to hatching and the vigor of larvae. The growth and reproductive parameters were not influenced (p>0.05) by the increasing levels of digestible energy of the rations. The feeding of females of Rhamdia quelen in breeding fit can be carried out with pelletized ration with 2,700 DE.kg of ration-1 based on vegetal ingredients, without damage to reproductive performance.


Bombardelli R, Sanches E, Tessaro L, Buzzi A, Martins C, Meurer F. The requirement of digestible energy for females of Rhamdia quelen fed with ration based on vegetal ingredients. Lat. Am. J. Aquat. Res.. 2017;43(3). Available from: doi:10.3856/vol43-issue3-fulltext-18 [Accessed 22 Jan. 2019].
Bombardelli, R., Sanches, E., Tessaro, L., Buzzi, A., Martins, C., & Meurer, F. (2017). The requirement of digestible energy for females of Rhamdia quelen fed with ration based on vegetal ingredients. Latin American Journal of Aquatic Research, 43(3). doi:http://dx.doi.org/10.3856/vol43-issue3-fulltext-18