Lactation curve models for estimating gene effects over a timeline [PDF]
, 2018 The effects of genes are commonly estimated using random regression models based on test-day data and only give a general gene effect. Alternatively, lactation curve models can be used to estimate biological and environmental effects, or to predict ...
de Koning, D J +3 more
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Comparison Between Different Functions of the Lactation Curve [PDF]
The Egyptian Statistical Journal, 1996 Six mathematical functions; Wood, Mitscherlich* exponential, Michaelis-Menten* exponential, Logistic* exponential, Weibull* exponential and Multiphasic; were used to describe the lactation curve of the monthly test- day average of 12020 Holstein Fresian ...
Ahmed Ali
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LACTATION CURVE OF THE SHEEP FROM BULGARIAN DAIRY SYNTHETIC POPULATION
, 2021 The aim of the study was to analyze the lactation curve of ewes from Bulgarian Dairy Synthetic Popula-tion depending on test-day milk yield and parity.
Nevyana Stancheva +3 more
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Environmental factors on the prediction of the lactation curve of Holstein cows [PDF]
Pesquisa Agropecuária BrasileiraThe 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 +4 more
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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 +4 more
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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 +5 more
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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 +3 more
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Modelling the lactation curve of dairy cows using the differentials of growth functions
, 2008 Descriptions of entire lactations were investigated using six mathematical equations. comprising the differentials of four growth functions (logistic. Gompertz, Schumacher and Morgan) and two other equations (Wood and Dijkstra).
M. H. FATHI NASRI +14 more
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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 +7 more
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Genetic and environmental smoothing of lactation curves with cubic splines [PDF]
, 1999 Most approaches to modeling lactation curves involve parametric curves with fixed or random coefficients. In either case, the resulting models require the specification of an underlying parametric curve. The fitting of splines represents a semiparametric
Brotherstone, S. +2 more
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