Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Jehan Frans Ettema"'
Autor:
Šarūnė Marašinskienė, Rūta Šveistienė, Barbara Kosińska-Selbi, Christin Schmidtmann, Jehan Frans Ettema, Violeta Juškienė, Morten Kargo
Publikováno v:
Animals, Vol 12, Iss 15, p 1926 (2022)
Assessing the economic importance of traits is crucial for delivering appropriate breeding goals in dairy cattle breeding. The aim of the present study was to calculate economic values (EV) and assign the importance of health traits for three dairy c
Externí odkaz:
https://doaj.org/article/38bf36e5f4b1431a838830d2aa358a11
Publikováno v:
Stephansen, R B, Lassen, J, Ettema, J F, Sørensen, L P & Kargo, M 2021, ' Economic value of residual feed intake in dairy cattle breeding goals ', Livestock Science, vol. 253, 104696 . https://doi.org/10.1016/j.livsci.2021.104696
In the Nordic countries of Denmark, Finland, and Sweden, a breeding value for Saved feed is targeted. Saved feed consists of two sub-traits, maintenance and metabolic efficiency, which are evaluated as residual feed intake. This study evaluated resid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::48597f7ef19754c81dbc5f0339ed37c9
https://pure.au.dk/portal/da/publications/economic-value-of-residual-feed-intake-in-dairy-cattle-breeding-goals(e730b767-1a0a-448b-80a1-5e5e1e71f861).html
https://pure.au.dk/portal/da/publications/economic-value-of-residual-feed-intake-in-dairy-cattle-breeding-goals(e730b767-1a0a-448b-80a1-5e5e1e71f861).html
Publikováno v:
Kosińska-Selbi, B, Schmidtmann, C, Ettema, J F, Szyda, J & Kargo, M 2022, ' Breeding goals for conservation and active Polish dairy cattle breeds derived with a bio-economic mode ', Livestock Science, vol. 255, no. 104809 . https://doi.org/10.1016/j.livsci.2021.104809
The aim of the study was to calculate economic values (EV) of breeding traits (production, reproduction, direct health, calving and survival traits) for the Polish dairy cattle breeds Polish Holstein (PH) and Polish Red (PR). EV are key elements in s
Autor:
Søren Dinesen Østergaard, Jørn Rind Thomasen, Anders Christian Sørensen, Line Hjortø, Jehan Frans Ettema, Morten Kargo
Publikováno v:
Ettema, J F, Thomasen, J R, Hjortø, L, Kargo, M, Ostergaard, S & Sorensen, A C 2017, ' Economic opportunities for using sexed semen and semen of beef bulls in dairy herds ', Journal of Dairy Science, vol. 100, no. 5, pp. 4161-4171 . https://doi.org/10.3168/jds.2016-11333
Dairy farmers can increase the number of dairy heifer calves born in their herd by using sexed semen. They can reduce the number of both dairy bull and heifer calves by using beef semen. Long before sexed semen became commercially available, it was b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9447a51708290d040eaa844de3ad4d4e
https://pure.au.dk/portal/da/publications/economic-opportunities-for-using-sexed-semen-and-semen-of-beef-bulls-in-dairy-herds(2926fc64-f760-44e4-9d70-9478c68ff2c3).html
https://pure.au.dk/portal/da/publications/economic-opportunities-for-using-sexed-semen-and-semen-of-beef-bulls-in-dairy-herds(2926fc64-f760-44e4-9d70-9478c68ff2c3).html
Autor:
J. Pedersen, Morten Kargo, Jehan Frans Ettema, Søren Dinesen Østergaard, Jan Lassen, Line Hjortø
Publikováno v:
Østergaard, S, Ettema, J F, Hjortø, L, Pedersen, J, Lassen, J & Kargo, M 2016, ' Avoiding double counting when deriving economic values through stochastic dairy herd simulation ', Livestock Science, vol. 187, pp. 114-124 . https://doi.org/10.1016/j.livsci.2016.03.004
It has been a challenge to avoid double counting when economic values (EV) of traits are derived for breeding goal traits when using stochastic herd simulation models. In this study multiple regression and model building with mediator variables repre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9607832b25c3f3c322df833649913a10
https://pure.au.dk/portal/da/publications/avoiding-double-counting-when-deriving-economic-values-through-stochastic-dairy-herd-simulation(3879324e-270a-4e9f-9035-87cb71ca3dd0).html
https://pure.au.dk/portal/da/publications/avoiding-double-counting-when-deriving-economic-values-through-stochastic-dairy-herd-simulation(3879324e-270a-4e9f-9035-87cb71ca3dd0).html
Publikováno v:
Anneberg, I, Østergaard, S, Ettema, J F & Kudahl, A B 2016, ' Economic figures in herd health programmes as motivation factors for farmers ', Preventive Veterinary Medicine, vol. 134, pp. 170-178 . https://doi.org/10.1016/j.prevetmed.2016.10.007
Veterinarians often express frustrations when farmers do not implement their advice, and farmers sometimes shake their heads when they receive veterinary advice which is practically unfeasible. This is the background for the development of a focused
Publikováno v:
Ettema, J F & Østergaard, S 2015, ' Short communication : Economics of sex-biased milk production ', Journal of Dairy Science, vol. 98, no. 2, pp. 1078-1081 . https://doi.org/10.3168/jds.2014-8774
In a recent data study using 2.4 million lactations of 1.5 million cows, it was reported that gestation of a female calf in the first parity increases cumulative milk production by approximately 445 kg over the first 2 lactations. The reported effect
Publikováno v:
Østergaard, S, Ettema, J F, Kudahl, A B & Sørensen, J T 2010, Development of a Simherd web application for herd health advisors-experiences and perspectives . in Farm Animal Health Economics . pp. 4-8, Nantes, France, 14/01/2010 .
Aarhus University
Aarhus University
SimHerd is a computer model of a dairy herd. In more than a decade the model has been applied and further developed within the research in herd management and animal health economics in dairy herds. Analyses with the SimHerd model have been included
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::92f4910924f7803b009cb86b9a100233
https://pure.au.dk/portal/da/publications/development-of-a-simherd-web-application-for-herd-health-advisors--experiences-and-perspectives(9c7cb880-2c41-11df-8b17-000ea68e967b).html
https://pure.au.dk/portal/da/publications/development-of-a-simherd-web-application-for-herd-health-advisors--experiences-and-perspectives(9c7cb880-2c41-11df-8b17-000ea68e967b).html
Publikováno v:
Ettema, J F, Østergaard, S & Kristensen, A R 2010, ' Modelling the economic impact of three lameness causing diseases using herd and cow level evidence ', Preventive Veterinary Medicine, vol. 95, pp. 64-73 .
Udgivelsesdato: 2. marts 2010 Diseases to the cow's hoof, interdigital skin and legs are highly prevalent and of large economic impact in modern dairy farming. In order to support farmer's decisions on preventing and treating lameness and its underly
Publikováno v:
Ettema, J F, Østergaard, S & Kristensen, A R 2009, ' Estimation of probability for the presence of claw and digital skin diseases by combining cow-and herd-level information using a Bayesian network ', Preventive Veterinary Medicine, pp. 89-98 . https://doi.org/10.1016/j.prevetmed.2009.08.014
Udgivelsesdato: November 2009 Cross sectional data on the prevalence of claw and (inter) digital skin diseases on 4854 Holstein Friesian cows in 50 Danish dairy herds was used in a Bayesian network to create herd specific probability distributions fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::035d3c682d29ac13892631aaa8205eb9
https://pure.au.dk/portal/da/publications/estimation-of-probability-for-the-presence-of-claw-and-digital-skin-diseases-by-combining-cow-and-herdlevel-information-using-a-bayesian-network(5f63fe80-9b84-11dd-a608-000ea68e967b).html
https://pure.au.dk/portal/da/publications/estimation-of-probability-for-the-presence-of-claw-and-digital-skin-diseases-by-combining-cow-and-herdlevel-information-using-a-bayesian-network(5f63fe80-9b84-11dd-a608-000ea68e967b).html