Celso Koetz
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View article: Price determinants of beef bulls sold in livestock auctions
Price determinants of beef bulls sold in livestock auctions Open
The main objective of this study was to evaluate the effects of phenotypic, genotypic, and auction characteristics that may influence the selling prices of bulls. Data from 1,540 Braford and 1,179 Brangus bulls sold at auctions in the stat…
View article: Use of the breeding soundness examination scoring system in Santa Inês and Dorper rams
Use of the breeding soundness examination scoring system in Santa Inês and Dorper rams Open
This study evaluates the use of the Breeding Soundness Evaluation (BSE) scoring system in Santa Inês and Dorper rams. 89 Santa Inês (n = 48) and Dorper (n = 41) rams were submitted to andrological examination and classified with the BSE sc…
View article: Infrared thermography and Doppler ultrasonography to evaluate the effects of scrotal insulation on testicular blood flow dynamics in bulls
Infrared thermography and Doppler ultrasonography to evaluate the effects of scrotal insulation on testicular blood flow dynamics in bulls Open
The aim of this study was to evaluate the dynamics of the scrotal temperature, sperm quality and testicular blood flow by using infrared thermography and Doppler ultrasonography in bulls submitted to scrotal insulation. Braford bulls (n = …
View article: Effect of scrotal insulation on sperm quality and seminal plasma proteome of Brangus bulls
Effect of scrotal insulation on sperm quality and seminal plasma proteome of Brangus bulls Open
Seminal plasma (SP) contributes to sperm physiology and metabolism, prevents premature capacitation, and protects sperm against oxidative stress. In order to evaluate the impact of heat stress in the semen of tropically adapted Brangus bre…
View article: Heritability estimation and genetic correlations for mature weight, visual scores, and growth traits in Nellore cattle
Heritability estimation and genetic correlations for mature weight, visual scores, and growth traits in Nellore cattle Open
This study was intended to estimate the genetic associations between growth traits and visual scores with possible changes in mature weight (MW) in 397,900 Nellore animals. A bi-character analysis was performed to estimate the (co)variance…
View article: Heritability estimation and genetic correlations for mature weight, visual scores, and growth traits in Nellore cattle
Heritability estimation and genetic correlations for mature weight, visual scores, and growth traits in Nellore cattle Open
This study was intended to estimate the genetic associations between growth traits and visual scores with possible changes in mature weight (MW) in 397,900 Nellore animals. A bi-character analysis was performed to estimate the (co)variance…
View article: Candidate genes related to reproductive traits of Hereford and Braford bulls
Candidate genes related to reproductive traits of Hereford and Braford bulls Open
This study emphasized the importance of using candidate genes in predicting semen quality in bulls that can be used in cow-calf production. The aim of this study was to evaluate some candidate genes related to reproductive traits in Brafor…
View article: 471 Use of doppler ultrasound to evaluate testicular blood flow dynamics in bulls
471 Use of doppler ultrasound to evaluate testicular blood flow dynamics in bulls Open
Evaluation of the testicular hemodynamics can significantly contribute to understand the thermoregulatory mechanisms and oxygen supply of the testis in domestic animals. The objective of this study was to evaluate the circulatory dynamics …
View article: Efeito do tamanho corporal na eficiência reprodutiva de vacas da raça Braford
Efeito do tamanho corporal na eficiência reprodutiva de vacas da raça Braford Open
The objective of this study was to verify the existence of a relationship between frame size obtained by the measurement of hip height (HH) of Braford cows with their reproductive efficiency. HH measurement were collected from 255 mature B…
View article: Relationship between Shape of Teat and Teat Tip and Somatic Cell Count (SCC) in Dairy Cows
Relationship between Shape of Teat and Teat Tip and Somatic Cell Count (SCC) in Dairy Cows Open
"Background: Mastitis is characterized by inflammation of the mammary gland, usually caused by pathogens, these infections may be classified as either clinical or subclinical, which are responsible for physical, chemical and bacteriologica…
View article: Pregnancy rates and formation of accessory corpora lutea in Nelore heifers, treated with hCG after fixed-time artificial insemination
Pregnancy rates and formation of accessory corpora lutea in Nelore heifers, treated with hCG after fixed-time artificial insemination Open
Avaliou-se a taxa de gestacao, circunferencia dos corpos luteos e formacao de corpos luteos acessorio (CLA) em novilhas da raca Nelore, tratadas com Gonadotrofina Corionica Humana (hCG) sete dias apos inseminacao artificial em tempo fixo (…