The aim of this paper was to determine effects of selected genetic and environmental factors on the concentration of acetone in blood of cows in the first trimester of lactation. The study included 124 Polish Holstein-Friesian primiparous cows born, reared and managed on the same farm. The samples of blood were collected on day 2, 5, 30, 60 and 90 after calving. The highest serum acetone concen...

A recent study on the Holstein/Friesian (HOL) breed has indicated that the rapid rise in percentage Holstein genes in the United Kingdom (UK) has been accompanied by an increasing rate of inbreeding (Kearney et al., 2004). They reported an average inbreeding rate of 0.17% per year since 1992. Some of the consequences of inbreeding, for instance, inbreeding depression, are expected to be more pr...

The immuno-staining patterns of skin leukocytes were investigated in three breeds of cattle: Holstein-Friesian, Brahman and Santa Gertrudis of similar age before and after tick infestation. The antibodies specific for CD45 and CD45RO reacted with cells in the skin of all Holstein-Friesian cattle but did not react with cells in the skin of any Brahman cattle. The same antibodies reacted with cel...

The aim of this study was to investigate whether plasma anti-Muellerian hormone (AMH) levels of Holstein-Friesian heifers could be used to predict ovum pick-up (OPU) and embryo production outcomes. Plasma samples and data were collected from 64 heifers, which underwent repeated OPU with subsequent in vitro embryo production followed by embryo flushing after superovulation. AMH levels were signi...

the study was carried out at agarfa atvet college dairy farm to evaluate the reproductive performance of holstein friesian× arsi and holstein friesian ×boran cattle. for the study, records compiled from 1983 to 2012 at the agarfa dairy farm were used as original data. the effects of breed, bloodlines, season and parity on the reproductive traits were evaluated. data were analyzed using the gene...

Lifetime dairy production, reproduction and growth traits of 75 females sired by Holstein, Jersey or Brown Swiss bulls and Holstein-Friesian x Gir dams of 1/2 to 3/4 Holstein-Friesian fractions were compared. The animals were in a single herd under the same management. Milk, fat and protein yields, concentrates fed, reproduction, and weights were recorded throughout the lifetime of the cows. Th...

El establecimiento de un plan nutricional con alimentación balanceada, es importante en la crianza terneras propósito lechero, ya que apacigua el estrés perciben cuando se les disminuye leche progresivamente antes del destete; además, cubre los requerimientos nutricionales para alcanzar peso idóneo periodo esperado. Por ello, investigación tuvo como objetivo determinar efecto alimenticio sobre ...

The study was conducted at Ardaita Agricultural Technical Vocational Education Training (ATVET) college dairy farm, to evaluate the reproductive performance of Holstein Friesian and its crosses with Boran cattle breeds. Data collected between 2000 and 2015 on reproductive traits (n=2632) were studied and analyzed using general linear model procedure. The overall estimated means for age at first...

Anaphylactic reaction rarely occurs after the 1st injection of penicillin-streptomycin in cattle. Immediately following intramuscular injection of a Holstein-Friesian cow with penicillin-streptomycin, the cow showed abnormal clinical signs that included respiratory distress, urticaria, and lacrimation. Recovery took approximately 2 h after intramuscular injection of dexamethasone. This report p...