Banca de DEFESA: CAIO CÉSAR CARNEIRO DOS SANTOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : CAIO CÉSAR CARNEIRO DOS SANTOS
DATE: 24/02/2022
TIME: 14:00
LOCAL: ON-LINE
TITLE:

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KEY WORDS:

Residual food intake; lambs; performance; milk production; Santa Inês.

PAGES: 32
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUMMARY:

To expand the consumption of sheep meat in the Brazilian market, it is necessary to invest in factors that improve the efficiency of the sheep meat production process, such as the search for ways to select more efficient animals within the herd. In this context, the residual food intake (CAR) proposed by KOCH et al. (1963) and an alternative. However, for sheep, there are few studies that address feed efficiency from the CAR perspective, especially for lactating ewes, so that the objective was to evaluate the productive performance of primiparous Santa Inês ewes classified through residual food consumption (CAR). The experiment was carried out using 14 primiparous Santa Inês ewes with an average body weight of 50.65 kg ± 5.50. The animals were
evaluated until the lambs were weaned (90 days after birth). The amount of concentrate offered was fixed at 600g daily (based on natural matter) and tifton hay 85 ad libitum for each animal. The diet was formulated to simulate medium quality forage with protein and energy supplementation. Digestibility assays, quantification of milk production and estimation of the physicochemical composition of milk from primiparous Santa Inês females of different feed efficiency classes were carried out. The average CAR was 0.019 ± 0.998 kg DM/day, ranging
from -1.779 to 2.141 kg DM/day. Fourteen ewes were used, 7 of which were classified as CAR negative (CAR-) (-0.774 ± 0.502 Kg/day) and 7 as CAR positive (CAR+) (0.8117 ± 0.664 Kg/day). There was a significant effect for CAR class effect on CMS, CPB and CFDNcp during the experimental period, no significant differences were observed for both CAR classes in PL and PLG. The selection of lactating ewes based on CAR is indicated, as it provides animals with lower intakes than their contemporaries, however, producing the same amount without
changing performance.

BANKING MEMBERS:
Externo à Instituição - MOZART ALVES FONSECA
Presidente - 2198749 - JOAO PAULO ISMERIO DOS SANTOS MONNERAT
Interno - 1226425 - MARCELO DE ANDRADE FERREIRA