Banca de DEFESA: VAMIRÉ LUIZ SENS JÚNIOR

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : VAMIRÉ LUIZ SENS JÚNIOR
DATE: 07/08/2020
TIME: 14:30
LOCAL: Web Conferência via Google Meet - meet.google.com/sdk-eney-pjs.
TITLE:

Influence of different feeding forms and different mixing ages on group housing system for sows on reproductive parameters and animal welfare.

KEY WORDS:

Group Housing, loose housing, Stanchions reproduction, sows.

PAGES: 45
BIG AREA: Ciências Agrárias
AREA: Medicina Veterinária
SUMMARY:

The objective of this experiment is to evaluate the reproductive parameters and Animal Welfare of swine females submitted to different group housing systems and differnt feeding models during gestation. The experiment was carried out in a sows unitfarm located in southern Brazil. A total of 1.080 females distributed in a 2 x 2 factorial scheme were used, with 10 repetitions over time. The factorial model consisted of two different transfer times to the group housing barns (immediately after the insemination protocol or at 35 days of gestation) and two different feeding process (“Y” or minibox drops). During the repetitions the females were equally distributed among the treatments in order of parturition (40 cycle 1 females (P1); 16 cycle 5 females and 16 cycle 6 females (P5&6) and 36 gilts). Artificial inseminations (AI) were performed with 45 ml intrauterine doses at a concentration of 1,25 billion viable sperm. From pregnancy to delivery, reproductive parameters were evaluated: return to estrus, pregnancy checked at 28 d with ultrasound, total births and average litter weight. The analysis of Animal Welfare during pregnancy was based on the Welfare Quality® protocol, evaluating the behaviour and health of females at specific moments during gestation. Behaviour data was collected 16 different times (days 1, 8, 15, 22, 29, 36, 42, 49, 56, 63, 70, 77, 84, 91, 99 and 106 after AI). Health assessment was performed on all females on days 5, 31, 40 and 101 after AI. The behavior during feeding was evaluated in gilts and primiparous animals weekly during pregnancy. There was no difference in the birth rate and in the total number of births when comparing the method of accommodation, system and interaction (P> 0.05) or for gilts, OP1 and OP5 and 6). In the evaluation of the behavior of gilts and primiparous animals during feeding, no difference was found (P> 0.05) for agonistic and active behavior when comparing system, gestation week and interaction (P> 0.05) nor for gilts, OP1 and OP5 and 6). The behavior of the females was not influenced by the system-housing interaction (P> 0.05) in any of the categories. Swine females can be handled in small collective groups (9) without minibox division. The management of the formation of collective pens can occur immediately after coverage or at 35 days.

BANKING MEMBERS:
Externa à Instituição - AMANDA PIMENTA SIQUEIRA
Externo à Instituição - THOMAZ LUCIA JÚNIOR
Externa à Instituição - JULIA EUMIRA GOMES NEVES PERINI
Presidente - 2648941 - IVAN BIANCHI