Weaning at 30, 75 and 180 days: Comparison between immune responses of beef calves

Teixeira, Odilene de Souza; Rocha, Marcela Kuczynski da; Sessim, Amir Gil; Sartori, Everton Dezordi; Rosa, Yago Machado da; Oliveira, Maria Carolina Muniz de; Lima, J. A. de F.; Canozzi, Maria Eugênia Andrighetto; Tarouco, Jaime Urdapilleta; Valle, Stella de Faria; McManus, Concepta; Barcellos, Júlio Otávio Jardim

doi:10.1016/j.rvsc.2021.06.002

Cited by 3 publications

(2 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Feed intake was measured by calculating the difference between the total weight of feed offered and the weight of leftovers the following day for all treatments. The leftover feed was weighted daily to adjust to the refusals rate of 5% (Teixeira et al, 2021b).…”

Section: Nutritional and Sanitary Managementmentioning

confidence: 99%

“…The earlier the weaning occurs, the higher the probability of cows becoming pregnant within the first weeks of the breeding season (Alforma et al, 2023). However, the younger calves are weaned, the more difficult it Three ages at weaning in beef calves: Implications on performance and development Teixeira et al is for them to cope with psychological, nutritional, physical (Lynch et al, 2019), and immunological challenges (Teixeira et al, 2021b).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Three ages at weaning in beef calves: Implications on performance and development

Teixeira,

Camargo,

Rocha

et al. 2024

Revista Brasileira De Zootecnia

Self Cite

View full text Add to dashboard Cite

We investigated the impact of weaning at 30, 75, and 180 days of age on performance, body measurements, and rumen development (using the β-hydroxybutyrate biomarker) of beef calves until 190 days of age. A total of 64 Brangus calves were assigned to three treatments: hyper-early (W30), weaned at 32±0.89 days of age (n = 22, 10 males and 12 females); early (W75), weaned at 77±0.95 days of age (n = 20, 12 males and eight females); and conventional (W180), weaned at 183±0.82 days of age (n = 22, 13 males and nine females). Body weight (BW), average daily gain (ADG), β-hydroxybutyrate (βHBA), and morphometric measurements were evaluated. These variables were influenced by an interaction between treatment and days and were not affected by the sex of calves. The W30 calves experienced weight loss from 30 to 40 days of age compared with the W75 and W180 calves. Consequently, at day 75, W30 animals were lighter and had lower body length, thoracic circumference, withers height, and croup height compared with the W75 and W180 calves. However, no significant differences in BW were observed among treatments at 85 days of age. Additionally, W30 calves exhibited higher ADG and a moderate correlation with βHBA levels. Weaning calves at 30 days of age may negatively affect their performance until the sixth week after weaning, but there is no impairment in performance at 190 days of age.

show abstract

Section: Nutritional and Sanitary Managementmentioning

confidence: 99%