https://repositorio.ufu.br/handle/123456789/5157 2026-10-04T00:56:34Z 2026-10-04T00:56:34Z https://repositorio.ufu.br/handle/123456789/50481 2026-09-30T06:20:52Z 2026-09-13T00:00:00Z

Title: Comportamento de éguas e potras em pastagem diversificada no período seco Abstract: The objective of this study was to evaluate the effect of age on the ingestive behavior of female horses grazing on pasture with a diversity of forage species (Panicum spp., Urochloa decumbens, and Cynodon nlemfuensis) during the dry season. The study was conducted at the Experimental Farm of the Federal University of Uberlândia, Glória campus, located in the city of Uberlândia, Minas Gerais, Brazil, in a 4.5-hectare area containing different forage species (Panicum spp., Urochloa decumbens, and Cynodon nlemfuensis) and invasive plants (Leucaena leucocephala and others not identified). After a 7-day adaptation period, observations were carried out for three consecutive days. A continuous sampling methodology using focal animal observation with 10-minute intervals was applied, with observations conducted from 08:00 to 16:00, totaling eight hours per day. Twelve female horses were used: six fillies with an average age of 4.2 years and six mares with an average age of 8.7 years. The average body weight was 347.1 kg for the fillies and 450 kg for the mares. Data were analyzed descriptively through frequency analysis, considering the two groups (fillies and mares) and six replications. A greater amount of time spent moving (4.4%) and interacting (2.3%) was observed in the fillies group. For the mares, values of 2.9% of the time spent moving and 1% in interactions were found. Both groups showed a greater preference for grazing Cynodon nlemfuensis (purple star grass), with values of 74.3% and 81.5% for fillies and mares, respectively. In contrast, for Panicum spp., a lower grazing time was observed for mares (9.1%) compared to fillies (16.7%). Urochloa decumbens was the least grazed species, with values of 6.4% and 8.9% for fillies and mares, respectively. The consumption of invasive plants was low, with higher consumption by fillies (2.6%) compared to mares (0.5%). It can be concluded that, in pasture with diversified forage species during the dry season, age influences the ingestive behavior of the animals.

2026-09-13T00:00:00Z https://repositorio.ufu.br/handle/123456789/50480 2026-09-30T06:20:52Z 2026-03-24T00:00:00Z

Title: Efeitos do tipo de conservação de forragem no comportamento alimentar de equinos em baia Abstract: This study aimed to compare feeding behavior under different types of forage conservation in stalled horses fed Tifton 85 hay or Tifton 85 haylage. Eight adult Quarter Horse horses were used and randomly assigned to two experimental treatments (100% hay and 100% haylage). The total experimental period lasted 14 days, with 10 days of adaptation and 4 days for data collection (all horses were evaluated during this period). The feeding management consisted of the daily supply of 10 kg and 6.97 kg of haylage and hay on an as-fed basis, respectively, in addition to four kilograms of commercial concentrate. Voluntary intake, feeding time, number of bites, and chewing movements were quantified. For behavioral evaluation, each animal was filmed for one minute at random times on every experimental day, and bite and chewing rates were determined from these recordings. To characterize the feeds, bromatological analysis was performed to determine dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), and acid detergent fiber (ADF) of the forages. The experiment followed a completely randomized design with two treatments (100% hay or 100% haylage) and four replications, considering each animal as the experimental unit. Means were compared using the t-test at a 5% probability level. Hay and haylage presented 106.8 and 134.7 g of CP, 732.5 and 650.7 g of NDF, 309.5 and 271.0 g of ADF, and 423.0 and 379.7 g of hemicellulose for hay and haylage, respectively. No difference was observed for feeding time. Hay showed a higher bite rate (6.44 bites per minute) compared to haylage (4.31 bites per minute). Haylage showed a higher chewing rate (66.31 chews per minute) compared to hay (60.81 chews per minute). However, haylage resulted in daily refusals in 50% of the animals. Hay provided total intake without refusals, and both forages ensured prolonged and similar feeding times. The mechanical difference lies in ingestion rates: hay requires a higher bite rate due to the difficulty of grasping the drier material, whereas haylage allows the intake of a larger amount of forage at once, increasing the chewing rate. Nevertheless, both diets proved efficient in keeping idle time to a minimum.

2026-03-24T00:00:00Z https://repositorio.ufu.br/handle/123456789/50477 2026-09-30T06:21:02Z 2026-08-26T00:00:00Z

Title: Efeito do uso da inseminação artificial em tempo fixo e de sistema automático de detecção de estro na eficiência reprodutiva de rebanho leiteiro Abstract: The resumption of ovarian activity and the efficient detection of estrus during the postpartum period are critical to the reproductive performance of dairy cows. However, metabolic, productive, reproductive, and health-related factors can influence both the behavioral manifestation of estrus and the conception rate. In this context, automated activity monitoring systems have been used as auxiliary tools in reproductive management. This thesis was developed aiming to investigate factors associated with the conception rate in Girolando cows in response to fixed-time artificial insemination (TAI), as well as to evaluate the association between automated estrus detection and the resumption of ovarian activity in Holstein cows in intensive dairy production systems. In the first study, factors associated with pregnancy after artificial insemination (P/TAI) were evaluated. Moderate/Strong estrus was associated with a higher probability of P/TAI, with cows being 2.11 times more likely to become pregnant compared to those with Absent/Weak estrus (P = 0.004). Parity also influenced P/TAI: second-lactation cows were 2.89 times more likely to conceive (P = 0.003). The season was also associated with the outcome, with a lower probability of P/TAI during the Summer compared to Winter (P = 0.032). Semen type and milk production showed no significant association with P/TAI. In the second study, the occurrence of ovulation and estrus events detected by automated activity monitoring were evaluated up to 56 days into lactation. The body condition score was associated with ovarian activity, while the locomotion score was not significantly associated with ovarian activity or estrus detection. During this period, 88.9% of the cows exhibited at least one ovulation, while 80% exhibited at least one estrus event detected by the system. Silent ovulations were observed in 13.7% of the cows, and a moderate positive correlation was found between the number of ovulations and the number of detected estrus events. In conclusion, the intensity of estrus, parity, and season of the year should be considered when interpreting the reproductive performance of dairy cows in the postpartum period. In addition, automated activity monitoring is effective in helping to identify the resumption of ovarian activity, especially when an estrus alert is emitted, although it does not completely replace ultrasound evaluation given the occurrence of silent ovulations.

2026-08-26T00:00:00Z https://repositorio.ufu.br/handle/123456789/50463 2026-09-26T06:16:39Z 2024-11-21T00:00:00Z

Title: Cistectomia Total Associada à Ureterostomia Cutânea Bilateral como Alternativa Cirúrgica em Cão com Carcinoma de Células Transicionais: Relato de Caso Abstract: This study aims to report the clinical case of a female dog with invasive urinary bladder neoplasia, submitted to cystectomy followed by cutaneous ureterostomy as a method of urinary diversion. Bladder carcinoma is one of the most frequent neoplasms affecting the urinary tract of dogs and cats, with a multifactorial etiology. Predisposing factors reported in the literature include exposure to toxic substances, antiparasitic baths, obesity, among others. When the bladder loses its functionality, surgical techniques are required to redirect urine to a new elimination route. In this context, procedures such as cystectomy associated with cutaneous ureterostomy have proven to be effective, with high therapeutic success rates. The case described involves a nine-year-old female dog with a history of dysuria, whose ultrasonographic examination revealed neoplastic infiltration and bilateral hydronephrosis. The patient underwent exploratory laparotomy, which revealed a bladder tumor, leading to total cystectomy and bilateral cutaneous ureterostomy. The excised tissue was sent for histopathological analysis, confirming the diagnosis of transitional cell carcinoma (TCC). Postoperative care included appropriate wound hygiene and administration of prescribed medications. Currently, the patient is in good clinical condition, demonstrating a positive response to treatment. This report highlights the importance of surgical intervention as a viable alternative in cases of invasive bladder tumors in small animals.

2024-11-21T00:00:00Z