Results 41 to 50 of about 829,404 (286)

Environmental factors on the prediction of the lactation curve of Holstein cows [PDF]

Pesquisa Agropecuária Brasileira
The objective of this work was to evaluate the influence of environmental factors on the lactation curve parameters and milk yield of Holstein cows. Data on lactations conducted from 2010 to 2019 in the state of Paraná, Brazil, obtained from the official
Amauri Felipe Evangelista, Rafaela Martins, Altair Antônio Valotto, Laila Talarico Dias, Rodrigo de Almeida Teixeira   +4 more
doaj   +1 more source

Evaluation of lactation models in pasture-based dairy ewes in Bosnia and Herzegovina

Mljekarstvo, 2020
Milk of Kupres, Privor and Stolac dairy ewe breeds is used for the production of the fine cheese varieties. To the best of our knowledge there are no information about milk production and milk composition of these pasture-based dairy ewes. The aim was to
Dragica Šalamon, Vinko Batinić, Stanko Ivanković, Neven Antunac, Alen Džidić   +4 more
doaj   +1 more source

Food resource allocation patterns in lactating females in a long-term selection experiment for litter size in mice [PDF]

, 2002
Resource allocation patterns, as quantified by residual food intake (RFI), and the consequences for offspring development were investigated during lactation in 96 females of a mouse line selected for 104 generations for high litter size at birth (S-line)
Luiting, Petronella, Petronella Luiting, Wendy M Rauw, Verstegen, Martinus, Knap, P.W., Luiting Petronella, Pieter W. Knap, Knap, Pieter, Luiting, P., Verstegen, M.W.A., Martinus WA Verstegen, Rauw Wendy M, Verstegen Martinus WA, Pieter W Knap, Martinus W.A. Verstegen, Knap Pieter W, Wendy M. Rauw, Rauw, W.M., Rauw, Wendy   +18 more
core   +1 more source

Lactation curves for milk yield, fat and protein content in Slovenian dairy sheep

Czech Journal of Animal Science, 2012
Lactation curves for daily milk yield, fat, and protein content in three dairy sheep breeds were estimated by the repeatability animal model using test-day records.
A. Komprej, G. Gorjanc, D. Kompan, M. Kovač   +3 more
doaj   +1 more source

Characteristics of Lactation Curve and Reproduction in Dairy Cattle

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2023
The purpose of the research was to assess changes in the lactation activity of cows and their impact on the level of reproduction, as well as to study their fluctuations with respect to genetic and environmental factors.
Sergiy Ruban, Viktor Danshyn, Мykhailo Matvieiev, Oleksandr O. Borshch, Oleksandr V. Borshch, Lesia Korol-Bezpala   +5 more
doaj   +1 more source

Estimating Holstein Lactation Curves with a Gamma Curve

Journal of Dairy Science, 1977
Abstract Milk production records of healthy Holstein cows were analyzed with the model: Yi = β 1 t i β 2 e − β 2 ti + ∈ i where Y i is milk production in kilograms at a specific time (t i ) in months. The parameters in this model were estimated with the techniques of intrinsically nonlinear regression.
D. Wayne Kellogg, N. Scott Urquhart, A.J. Ortega   +2 more
openaire   +1 more source

Effects of dry period length and dietary energy source on lactation curve characteristics over 2 subsequent lactations [PDF]

, 2016
This study evaluated the effects of dry period (DP) length and dietary energy source on lactation curve characteristics over 2 subsequent lactations.
Remmelink, G J, Bruckmaier, Rupert, Kok, A, Gross, Josef Johann, Kemp, B., Kemp, B, Van Knegsel, A.T.M., van Knegsel, A T M, Chen, J, Chen, J., Remmelink, G.J., Gross, J.J., Bruckmaier, R.M., Kok, A.   +13 more
core   +1 more source

Lactation Curve of Guinea Pig

Nihon Chikusan Gakkaiho, 1960
The lactation curve of the guinea pig was investigated by two methods: daily hand milking with the aid of oxytocin and timed nursing done every other day.By the latter method, the lactation reached maximum on the 3rd to the 11th day and continued for 21 to 35 days.
NAGASAWA, Hiroshi, TOZAKI, Takayoshi, SHODA, Yoichi, NAITO, Motoo   +3 more
openaire   +2 more sources

Diversity of dairy goat lactation curves in France [PDF]

Journal of Dairy Science, 2018
A high level of production at the peak of lactation may be associated with animal health disorders, high feeding costs, and reduced milk supply throughout the year. The objective of this study was to typologize the lactation curves in French dairy goats and analyze the influence of environmental and genetic factors on these curves.
Arnal, Mathieu, Robert-Granié, Christèle, Larroque, Helene   +2 more
openaire   +4 more sources

Transcriptome provides insights into bovine mammary regulatory mechanisms during the lactation cycle

Journal of Applied Animal Research, 2022
The molecular events underlying the lactation curve of dairy animals have long been a biological conundrum for mammary biologists, and a cause of a considerable loss of income for dairy farmers.
Xuyang Song, Meng Zhao, Qiaoqiao Cao, Shengxuan Wang, Ranran Li, Xuan Zhang, Letian Zhang, Kerong Shi   +7 more
doaj   +1 more source