Banca de QUALIFICAÇÃO: MARIANA ARAUJO ANDRADE

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : MARIANA ARAUJO ANDRADE
DATE: 28/06/2022
TIME: 14:30
LOCAL: Sala virtual- Google meet
TITLE:

LIPID SUPPLEMENTATION WITH CALCIUM SALTS OF SOYBEAN OIL DURING THE SECOND GESTATIONAL HALF IN DORPER x SANTA INÊS EWES

KEY WORDS:

Maternal nutrition. Carcass characteristics. Performance of pregnant ewes. Production and quality of sheep milk.

PAGES: 37
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUBÁREA: Produção Animal
SPECIALTY: Criação de Animais
SUMMARY:

Maternal nutrition provides the offspring with metabolic, structural and physiological changes that can have repercussions throughout the life of the animal, about the performance characteristics and finishing of carcass.  Thus, the aim of this study was to evaluate the effects of supplementation of calcium salts of soybean oil in the maternal diet of crossed breeds Dorper x Santa Inês ewes during the second gestational  half on the productive performance of the pair (sheep and lamb) as well as the quantitative carcass characteristics of the offspring. The experiment was carried out in the small ruminant sector of the Federal Rural University of The Amazon (UFRA/Campus Parauapebas). 60 mixed-race ewes were used, these were kept on pasture until  half of the gestation in a grazing system formed by Tifton 85,  at 75 days of gestation, 43 ewes were allocated and kept in confinement of individual stalls to receive the treatments:   (1) Control (CON; n= 21) – basal diet formulated to meet the basic nutritional requirements of single-lamb pregnant ewes, or (2) Supplementation (CSSO; n= 22) – basal diet  plus supplementation with soybean oil calcium salts (rumen protected fat), 1.5g/kg body weight (5% based on DM).  After delivery, sheep and lamb form kept in confinement together. Upon reaching the weight of ±20kg the lambs were weaned and confined where they received a baseline diet formulated with estimates of daily weight gain (DGM) of 250 g.animal-1 until  slaughter with ±34kg.  Data on ewe performance were evaluated for intake, digestibility, production and quality of milk; and  lamb's performance from birth to slaughter, morphometric characteristics, quantitative characteristics and carcass yield and non-carcass components.  The supplemented matrices  presented higher weight (P<0.05) and GMD during pregnancy,  the MS, kg/day showed a tendency to interact with maternal food treatment and week of gestation (P = 0.06), there was  an effect of food treatment for intake (P= 0.03) and organic matter digestibility (P =  0.001). No treatment effect was observed on milk production and quality.  A treatment effect was observed for the variable birth weight  of lambs (P = 0.01), and there was no significance in the DGM in any of the evaluated times. There was a difference (P = 0.05) between treatments for the variables of lumbar width, internal length and carcass depth.   There was a treatment effect onweight loss by cooling (P= 0.01).  There was a difference between the sexes for the weight of the palette, ham and loin and in the yield of the true rib. There was a difference (P>0.01) between food treatment for the spleen and esophagus components, and sex effect (P < 0.05) for small intestine, bladder, head, paws, kidneys and liver.  In view of this, supplementation with calcium salts of soybean oil during the gestational phase provided positive changes during pregnancy and in the development of offspring resulting from fetal programming. 

BANKING MEMBERS:
Presidente - 1354679 - KALIANDRA SOUZA ALVES
Interna - 1839209 - DAIANY IRIS GOMES
Interno - 1632663 - LUIS RENNAN SAMPAIO OLIVEIRA
Externo ao Programa - 1487106 - CRISTIAN FATURI
Externo à Instituição - JOÃO PAULO ISMÉRIO DOS SANTOS MONNERAT - UFRPE