Genes associated with lactation evolved more slowly than other genes in the mammalian genome. Higher conservation of milk and mammary genes suggest that species variation in milk composition is due in part to the environment and that we must look deeper into the genome for regulation of lactation. At the onset of lactation, metabolic changes are coordinated among multiple tissues through the en...

The objectives were to determine the effect of administering recombinant bovine ST (bST) every 14 d on milk yield and milk composition in dairy ewes and to assess the possible effects of treatment on milk yield loss that occurs at lamb weaning. Seventy-two lactating dairy ewes were separated into 4 groups at lambing, and each group received no bST (control) or 40, 80, or 120 mg of bST every 14 ...

UĞURLU, M., I. KAYA and M. SARAY, 2016. Effects of some environmental factors on calf birth weight and milk yield of Anatolian Water Buffalo (Bubalus bubalis). Bulg. J. Agric. Sci., 22: 995–998 This research was conducted to determine the effects of some environmental factors on calf birth weight, milk yield and lactation length in Anatolian Water Buffalo. The data on birth weight of 1006 buffa...

Because of low energy reserves at birth, piglets are dependent on the sow’s milk for survival. Breed differences can influence milk composition. The objective of this study was to examine litter characteristics, milk composition including calcium and the water holding capacity of casein, solvation, between the highly prolific Meishan breed and lean crossbred pigs. Samples were collected by hand...

Milk quality has been an issue of public health concern and changes occur in milk composition with the changing physiological and management states. An experiment was conducted to investigate changes in milk yield and fatty acids profile with advancing age and lactation stage in dairy buffaloes. A total of 12 multiparous lactating dairy buffaloes were divided into two groups younger (1-4 lactat...

to estimate heritability and genetic trend for 305-d milk production and lactation persistency, a total of 130,668 monthly test day milk yields belonging to 15,183 first lactation holstein cows in 131 herds and calved from 2000 to 2009 were used. to calculate 305-d milk yield as well as lactation persistency, estimated parameters of wilmink’s exponential function were applied. the parameters of...

In the emergence of diverse animal life forms, food is the most insistent and pervasive of environmental pressures. As the life sciences begin to understand organisms in genomic detail, evolutionary perspectives provide compelling insights into the results of these dynamic interactions between food and consumer. Such an evolutionary perspective is particularly needed today in the face of unprec...

The main objective of this experiment was to study the γ-glutamyl transferase (GGT) activity in milk during lactation and its relationship with metabolic status of dairy cows, milk yield, milk composition, and cheesemaking properties. The study was performed in a tied stall barn and involved 20 lactations from 12 healthy multiparous Italian Friesian dairy cows. During lactation starting at d 10...

The objective of the present study was to compare the ability of chlorhexidine and povidone-iodine to cause cessation of lactation in Staphylococcus aureus-infected mammary quarters, assess milk production in the treated quarter in the subsequent lactation, and evaluate whether microbiological cure was obtained. Fourteen mid- to late-lactation Holstein-Friesian dairy cattle from the Washington ...

and Implications The relationships between body condition score (BCS) observed during the first 45 days of lactation and two measures of feed efficiency, residual feed intake (RFI) and gross efficiency (GE) defined as milk energy / DMI, measured during mid-lactation were assessed in 255 first lactation Holstein cows. No significant differences in BCS at calving and at approximately 40 days in m...