Semen quality of Nellore and Angus bulls classified by fertility indices and relations with field fertility in fixed-time artificial insemination.

Despite being the most important form of biotechnology in animal reproduction, artificial insemination was used in about 23% of Brazilian bovine herds in 2021. This is due to the variability of results caused by varying bull fertility and body condition of the cows. This study aimed to correlate the fertility indices of bulls with qualitative attributes of the semen.

Cat epididymal semen cryopreserved with and without vitamin E: effect on sperm parameters and lipid peroxidation.

The aims of this study were to investigate: 1) if the addition of α-tocopherol (vitamin E) in three concentrations (0.3, 0.6 and 0.

Could bovine livestock intensification in Pantanal be neutral regarding enteric methane emissions?

Bovine livestock is a major anthropogenic greenhouse gas source via enteric methane. Brazilian bovine livestock is also responsible for emissions from land-use changes. In contrast, enteric emissions from extensive cattle systems in wetlands might have been overestimated.