Prostaglandin (PG) F2alpha released from the uterus in a pulsatile fashion is essential to induce regression of the corpus luteum (CL) in the cow. In addition to the uterus, the CL has also been recognized as a site of PGF(2alpha) production. Therefore, this study aimed to determine the detailed dynamics of the releasing profile of CL-derived PGF2alpha together with uterus-derived PGF2alpha dur...

Abstract Faeces from cows with different milk yield and non-lactating were applied to soil investigate whether N 2 O efflux is related feeding-induced differences in faecal microbiome abundances of nitrification denitrification genes. Fungal 18S-rRNA gene abundance was the highest faeces group. The 18S-rRNA/ergosterol ratio showed a strong positive correlation 18S-rRNA/fungal glucosamine ratio....

Conventional dairy farming practices usually involve early separation of calves from their dams. Cow-calf contact (CCC) systems may offer an alternative rearing solution that allows for the expression natural behaviours, such as suckling and bonding. However, literature exploring effects CCC on lying behaviours lactating cows is limited. Thus, aims this study were to assess: (1) with without ac...

In a previous study, milk iodine concentration from 501 farms across Canada was found to vary considerably and appeared to be influenced by feeding practices. Farms with contrasting levels of milk iodine from a subset of 200 participating farms were used to determine the relationship between milk iodine concentration and the concentration of this mineral in different feeds and complete diets gi...

Estrus is an important behavior that can potentially be subjected to genomic selection. Circulating estradiol concentrations at estrus may a useful phenotype if the absolute of are associated with overt phenotypes for (activity, rump touches, or both; e.g., mounts, chinrests) easily observed. The objective was measure plasma and associate these measurements increase in activity (steps per hour)...