Banca de QUALIFICAÇÃO: URIAS FAGNER SANTOS NASCIMENTO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : URIAS FAGNER SANTOS NASCIMENTO
DATE: 27/06/2022
TIME: 14:00
LOCAL: Google Meet (https://meet.google.com/opa-tdro-inb)
TITLE:

Evaluation of morphometric, morphological characteristics and mineral composition of Dorper and Santa Inês sheep hoods

KEY WORDS:

horny case, minerals, morphology, mineral supplementation

PAGES: 60
BIG AREA: Ciências Agrárias
AREA: Medicina Veterinária
SUBÁREA: Clínica e Cirurgia Animal
SPECIALTY: Clínica Veterinária
SUMMARY:

Among the main health problems that affect sheep farming, foot injuries are often reported as causes of economic losses, being the third leading cause of complaints from producers, such as diseases that affect the herds, behind only endoparasitosis and reproductive diseases. Knowledge about the dimensions of the hooves and their functional aspects has been increasingly necessary, since the conformation of the hooves can interfere with the longevity, lameness and production of the animals. Because they are the only means of contact between animals and the ground, they function as shock absorbers and guarantee the stability and transmission of the locomotion impulse, the hooves are subject to several external factors that can lead to their early wear, abnormal growth and the installation of infectious agents. Among the foot diseases, mineral deficiencies are common in herds and can be corrected with herd supplementation, however, there may be differences in mineral concentrations depending on breeds, management adopted in the properties, physiological state and age of the animals. Twenty sheep were used, ten of the Dorper breed and ten of the Santa Inês breed, belonging to two herds. The animals came from known farms, raised in a semi-intensive regime, grazed during the day on Panicum maximum cv Massai pastures. The forelimbs and hindlimbs of the right side of the animals were selected for the measurements of the measures of the hooves. The nails were disarticulated after being immersed in water at 60ºC for 10 minutes and with the aid of a Zaaz precision electronic caliper (Amatools®) the measurements of the wall height of the abaxial and axial face of the hooves, height of the periople, length and width were measured. of the sole and length and width of the hoof bulb. To obtain the wall thickness of the hoof, sole and bulb, an incision will be made along the coronal edge of the hooves with the aid of a hand saw, in order to remove adjacent and fixative structures to the bones of the corresponding distal phalanges. In addition, with the aid of a protractor, the angle of the hooves of each limb was measured. The determination of mineral composition was performed using a Shimadzu Ray Ny EDX-720 energy dispersive X-ray fluorescence spectrometer. The voltage applied to the X-ray tube was 15 keV and 50 keV, current of 100 μA with detector dead time of 40% and collimator of 10 mm. Spectra were obtained sequentially from 0 to 40 keV. It was concluded that there are morphological differences between the hooves of Dorper and Santa Inês sheep and that the levels of potassium, calcium, phosphorus, magnesium, sulfur, iron, zinc, copper and manganese were higher in Dorper animals when compared with the animals Santa Inês.

BANKING MEMBERS:
Presidente - 2073025 - HUBER RIZZO
Externo à Instituição - EDUARDO LUIZ CAVALCANTI CALDAS - UFS
Externa à Instituição - TATIANE RODRIGUES DA SILVA - UFCG