Results 31 to 40 of about 8,772,762 (291)

Genetic profile of total body energy content of Holstein cows in the first three lactations [PDF]

open access: yes, 2005
Weekly total body energy content (TBEC) was calculated for 444 Holstein cows in their first 3 lactations. These calculations were based on body lipid and protein changes predicted from weekly changes in body condition score and live weight of each cow ...
Banos, G   +3 more
core   +1 more source

On the dynamics and selective transport of fatty acids and organochlorines in lactating grey seals (Halichoerus grypus) [PDF]

open access: yes, 2010
This thesis examines fatty acid (FA) and polychlorinated biphenyl (PCB) dynamics in a marine top predator, the grey seal (Halichoerus grypus,) and their transfer during lactation from mother to offspring.
Arriola Ortiz, Aline
core   +2 more sources

Insights into Lameness in Dairy Cattle: The Role of Body Condition Score and Lactation Dynamics

open access: yesVeterinary Sciences and Practices
Lameness is a significant welfare and economic issue in dairy farms, resulting in reduced milk yield, increased treatment costs, and higher culling rates.
Yalçın Alper Özturan, İbrahim Akın
doaj   +1 more source

Relationship between season, lactation number and incidence of clinical mastitis in different stages of lactation in a Holstein dairy farm.

open access: yesVeterinary research forum : an international quarterly journal, 2013
The aim of the present study was to compare the occurrence and duration of clinical mastitis in different seasons, stages of lactation period and parities in a Holstein dairy farm in Iran. A retrospective epidemiological survey from April 2005 to March 2008 was conducted on 884 clinical mastitis cases of 7437 lactations.
Maede Moosavi   +3 more
openaire   +3 more sources

Milk Yield, Somatic Cell Count, and Udder Measurements in Holstein Cows at Different Lactation Number and Months

open access: yesMedia Peternakan, 2015
The aim of this study was to investigate the effect of lactation number and months on milk yield, somatic cell count (SCC) and udder measurements in Holstein cows. In the study, 30 first lactation and 49 second lactation, totally 79 Holstein cows housing
A. Ceyhan , M. Cinar , U. Serbester
doaj   +1 more source

The effect of lactation number and lactation stage on milk yield, on the composition and on the microbiological properties of raw cow milk in a Hungarian dairy farm

open access: yesÉlelmiszervizsgálati Közlemények, 2021
Changes in the composition and hygienic properties of milk affect producer price, so it is essential for the responsible dairy farmer to collect information on changes in these parameters due to various factors. In their study, the authors seek to answer the question whether there is a fluctuation in the daily milk yield of cows and in the composition (
Flóra Mária Petróczki   +2 more
openaire   +2 more sources

Prevalence of Bovine KetØsis in Relation to Number and Stage of Lactation

open access: yesActa Veterinaria Scandinavica, 1983
The prevalence of bovine ketosis as distributed among various selected subgroups of 504 Ayrshire and Friesian cows was studied during the indoor-housing season 1978–1979 in western and eastern parts of Finland. Special attention was paid to variation by lactation number.
openaire   +3 more sources

The influence of metabolic hormones on lactation [PDF]

open access: yes
Lactation is regulated by reproductive and metabolic hormones, and critical for infant and maternal health. However, the range of hormones acting on the mammary gland, their mechanisms of action, and concentrations required for milk secretion are unclear.
Rostom, Hussam
core   +1 more source

Estimation of lactation yield from incomplete lactation records

open access: yes, 1992
For estimating the lactation Yield of cattle and buffaloes daily milk is recorded at systematic time intervals during the entire lactation period for a sample of selected animals.
Singh, Randhir, Narain, P.
core   +2 more sources

Analysis of Genotype × Environment Interaction for milk production in dairy cow

open access: yesНауковий вісник Львівського національного університету ветеринарної медицини та біотехнологій імені С.З. Гжицького. Серія: Сільськогосподарські науки, 2018
Genotype by environment interaction was studied with 526 lactation milk records of Red Steppe dairy cows maintained at State Enterprise “Breeding reproducer “Stepove” (Mykolayiv region, Ukraine).
S. S. Kramarenko   +2 more
doaj   +1 more source

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