Níveis de folha de castanheira como aditivo em rações para Tambaqui

Abstract

The objective of this research was to verify the influence of the use of dehydrated leaves of chestnut in the feeding on the productive performance and haematological parameters of tambaquis. A total of 100 tambaquis, with a mean initial weight of 231g, were distributed in 20 polyethylene tanks, forming a completely randomized design with five treatments and four replicates. The animals were fed a commercial feed containing 32% crude protein, plus the chestnut leaf, forming the following treatments: control; 0.50; 0.75; 1.00 and 1.25% of the dehydrated sheet. At the end of the experimental period, the fish were counted for survival evaluation and weighed to determine the performance parameters, as well as the blood collection to analyze hematological parameters. Data were submitted to analysis of variance at 5% of probability and, when significant, were submitted to regression analysis at the 5% level of significance. There was a quadratic behavior of the levels of the chestnut leaf in the feed on the final weight, weight gain and fish feed conversion. There was no difference between treatments for feed consumption, survival rate and haematological parameters of tambaquis. It was concluded that the inclusion of 0.58% of dehydrated cashew leaf in the rations improves tambaqui performance.