Aarhus University Seal / Aarhus Universitets segl

Jehan Frans Ettema

  1. 2020
  2. Published

    Utilizing beef x dairy crossbreds for beef production – Danish experiences. / Vestergaard, Mogens ; Spleth, P.; Stephansen, R.; Kargo, Morten ; Ettema, Jehan Frans; Fogh, A.

    Book of Abstracts of the 71st Annual Meeting of the European Federation of Animal Science. Vol. 26 Wageningen Academic Publishers, 2020. p. 317.

    Research output: Contribution to book/anthology/report/proceedingConference abstract in proceedingsResearchpeer-review

  3. 2019
  4. Published

    Derivation of economic values for German dairy breeds. / Schmidtmann, C.; Kargo, Morten ; Ettema, Jehan Frans; Hinrichs, D.; Thaller, G. .

    2019. 609-609 Abstract from 70th Annual Meeting of the European Federation of Animal Science EAAP 2019, Ghent, Belgium, Ghent, Belgium.

    Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

  5. Published

    SimHerd Crossbred for estimating the economic effects of crossbreeding. / Kargo, Morten ; Clasen, Julie ; Ettema, Jehan Frans; Davis, R. B.; Østergaard, Søren.

    2019. 285-285 Abstract from 70th Annual Meeting of the European Federation of Animal Science EAAP 2019, Ghent, Belgium, Ghent, Belgium.

    Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

  6. 2018
  7. Published

    Tørkeråd: Køb grovfoder i stedet for at slagte dyr. / Ettema, Jehan Frans; Kudahl, Anne Braad; Børsting, Christian Friis; Østergaard, Søren.

    In: KvægNYT, Vol. 23, 12.2018, p. 2-2.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  8. 2017
  9. Published

    Economic opportunities for using sexed semen and semen of beef bulls in dairy herds. / Ettema, J. F.; Thomasen, J. R.; Hjortø, L.; Kargo, M.; Ostergaard, S.; Sorensen, A. C.

    In: Journal of Dairy Science, Vol. 100, No. 5, 05.2017, p. 4161-4171.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articlepeer-review

  10. 2016
  11. Published

    Avoiding double counting when deriving economic values through stochastic dairy herd simulation. / Østergaard, Søren; Ettema, Jehan Frans; Hjortø, Line; Pedersen, Jørn; Lassen, Jan; Kargo, Morten.

    In: Livestock Science, Vol. 187, 01.05.2016, p. 114-124.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articlepeer-review

  12. Published

    Economic figures in herd health programmes as motivation factors for farmers. / Anneberg, Inger; Østergaard, Søren; Ettema, Jehan Frans; Kudahl, Anne Braad.

    In: Preventive Veterinary Medicine, Vol. 134, 2016, p. 170-178.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articlepeer-review

  13. 2015
  14. Published

    Derivation of econmomic values for breeding goal traits in conventional and organic dairy production. / Kargo, Morten; Ettema, Jehan Frans; Hjortø, Line; Pedersen, Jørn; Østergaard, Søren.

    Book of Abstracts of the 66th Annual Meeting of the European Federation of Animal Science. Vol. 21 The Netherlands : Wageningen Academic Publishers, 2015. p. 403-403 (EAAP Book of Abstracts).

    Research output: Contribution to book/anthology/report/proceedingConference abstract in proceedingsResearch

  15. Published

    Short communication : Economics of sex-biased milk production. / Ettema, Jehan Frans; Østergaard, Søren.

    In: Journal of Dairy Science, Vol. 98, No. 2, 01.01.2015, p. 1078-1081.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articlepeer-review

  16. Published

    Genomic testing interacts with reproductive surplus in reducing genetic lag and increasing economic net return. / Hjortø, Line; Ettema, Jehan Frans; Kargo, Morten ; Sørensen, Anders Christian.

    In: Journal of Dairy Science, Vol. 98, No. 1, 01.2015, p. 646–658.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articlepeer-review

  17. 2014
  18. Published

    Handleplaner skal kunne betale sig. / Kudahl, Anne Braad; Anneberg, Inger; Ettema, Jehan Frans.

    In: Magasinet KVÆG, 09.2014, p. 36-37.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  19. Published

    Combi-Cross – The Use of New Technologies for Improving Dairy Crossbreeding Programs. / Kargo, Morten ; Ettema, Jehan Frans; Sørensen, Lydia Henriette; Fjordside, M; Hjortø, Line.

    2014. Poster session presented at 10th World Congress on Genetics Applied to Livestock Production (WCGALP), Vancouver, Canada.

    Research output: Contribution to conferencePosterResearch

  20. Published

    Combi-Cross – The Use of New Technologies for Improving Dairy Crossbreeding Programs. / Kargo, Morten ; Ettema, Jehan Frans; Sørensen, Lydia Henriette; Fjordside, M; Hjortø, Line.

    2014. Paper presented at 10th World Congress on Genetics Applied to Livestock Production (WCGALP), Vancouver, Canada.

    Research output: Contribution to conferencePaperResearchpeer-review

  21. Published

    Multiple Regression and Mediator Variables can be used to Avoid Double Counting when Economic Values are Derived using Stochastic Herd Simulation. / Østergaard, Søren; Ettema, Jehan Frans; Hjortø, Line; Pedersen, Jørn; Kargo, Morten .

    2014. Paper presented at 10th World Congress on Genetics Applied to Livestock Production (WCGALP), Vancouver, Canada.

    Research output: Contribution to conferencePaperResearchpeer-review

  22. Published

    Evaluation of a tool for integration of economy in veterinary herd health programs for dairy herds. / Kudahl, Anne Braad; Ettema, Jehan Frans; Østergaard, Søren; Anneberg, Inger; Jørgensen, D B.

    In: EAAP Book of Abstracts, 08.2014, p. 453-453.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperConference abstract in journalpeer-review

  23. Published

    Tal kan motivere - men også skabe skepsis. / Anneberg, Inger; Kudahl, Anne Braad; Ettema, Jehan Frans.

    In: Dansk Veterinaertidsskrift, Vol. 10, 2014, p. 18-21.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  24. 2010
  25. Published

    Development of a Simherd web application for herd health advisors - experiences and perspectives. / Østergaard, Søren; Ettema, Jehan Frans; Kudahl, Anne Braad; Sørensen, Jan Tind.

    Farm Animal Health Economics. 2010. p. 4-8.

    Research output: Contribution to book/anthology/report/proceedingArticle in proceedingsResearch

  26. Published

    Effect of including genetic progress in milk yield on evaluating the use of sexed semen and other reproduction strategies in a dairy herd. / Ettema, Jehan Frans; Østergaard, Søren; Sørensen, M K.

    Farm Animal Health Economics. 2010. p. 80-88.

    Research output: Contribution to book/anthology/report/proceedingArticle in proceedingsResearch

  27. Published

    Modelling the economic impact of three lameness causing diseases using herd and cow level evidence. / Ettema, Jehan Frans; Østergaard, Søren; Kristensen, Anders Ringgaard.

    In: Preventive Veterinary Medicine, Vol. 95, 2010, p. 64-73.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articlepeer-review

  28. Published

    Så meget koster de halte køer. / Ettema, Jehan Frans.

    In: Bovilogisk, 2010.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  29. 2009
  30. Published

    Brug af kødkvægtyre i den økologiske malkekvægbesætning. / Jørgensen, Kirstine F; Ettema, Jehan Frans; Byskov, Kevin; Kargo, Morten.

    Brug af kødkvægtyre i den økologiske malkekvægbesætning. 1. ed. Dansk Landbrugsrådgivning, Landscentret, 2009.

    Research output: Contribution to book/anthology/report/proceedingBook chapterCommunication

  31. Published

    Estimation of probability for the presence of claw and digital skin diseases by combining cow- and herd-level information using a Bayesian network . / Ettema, Jehan Frans; Østergaard, Søren; Kristensen, Anders Ringgaard.

    In: Preventive Veterinary Medicine, 2009, p. 89-98.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articlepeer-review

  32. Published

    Managment og økonomiske aspekter af anvendelse af kønssorteret sæd på besætningsniveau. / Ettema, Jehan Frans; Østergaard, Søren.

    In: Dansk Holstein, No. 4, 2009, p. 44-44.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  33. Published

    Økonomisk betydning af laminitis-relaterede sygdomme og digital dermatitis. / Ettema, Jehan Frans; Nielsen, Bodil Højlund; Østergaard, Søren.

    Klovsundhed: Sund Klov i malkekvægsbesætninger. ed. / Kenneth Krogh; Pia Nielsen. Maj. ed. Dansk Landbrugsrådgivning, Landscentret; Dansk Kvæg, 2009. p. 28-31.

    Research output: Contribution to book/anthology/report/proceedingReport chapterCommunication

  34. 2008
  35. Published

    Kan kønssorteret sæd øge produktionen af økologisk oksekød? / Ettema, Jehan Frans; Sørensen, Jan Tind.

    In: FØJO e-Nyt, No. 2, 01.12.2008, p. 1.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  36. Published

    Kan økonomien i at bruge kødkvægstyre i økologisk mælkeproduktion forbedres ved at bruge kønssorteret sæd? / Ettema, Jehan Frans; Sørensen, Jan Tind.

    In: Landbrugsinfo - Økologi, 24.11.2008, p. 1.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  37. Published

    Økonomi i at bruge kødkvægstyre til økologiske malkekøer. / Ettema, Jehan Frans; Sørensen, Jan Tind.

    In: Landbrugsinfo - Økologi, 20.08.2008.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  38. Published

    Brug af kønssorteret sæd til besætningsudvidelse. / Ettema, Jehan Frans; Østergaard, Søren.

    Seminar Boologisk Selskab. Dansk Boologisk Selskab, 2008. p. 18-23.

    Research output: Contribution to book/anthology/report/proceedingArticle in proceedingsResearch

  39. Published

    Der er penge i god reproduktion. / Østergaard, Søren; Ettema, Jehan Frans.

    Dansk Kvæg Kongress - Bilag. Dansk Landbrugsrådgivning, Landscentret; Dansk Kvæg, 2008. p. 10-11.

    Research output: Contribution to book/anthology/report/proceedingArticle in proceedingsCommissioned

  40. Published

    Economic impact on herd level of three categories of lameness causing disorders estimated through simulation. / Ettema, Jehan Frans; Østergaard, Søren.

    Proceedings of the 15th International Symposium & the 7th Conference on Lameness In Ruminants. 2008. p. 145.

    Research output: Contribution to book/anthology/report/proceedingArticle in proceedingsResearch

  41. Published

    Is postponed first insemination of cows in a high yielding dairy herd profitable? / Østergaard, Søren; Ettema, Jehan Frans; Sørensen, Jan Tind.

    Cattle Consultancy Days 2008. Cattle Consultancy Days, 2008. p. 139-146.

    Research output: Contribution to book/anthology/report/proceedingArticle in proceedingsResearch

  42. Published

    Management makes or breaks the economic opportunities for sexed semen use in the modern dairy herd. / Ettema, Jehan Frans; Østergaard, Søren.

    2008. Paper presented at Cattle Consultancy Days 2008, Denmark.

    Research output: Contribution to conferencePaperResearch

  43. Published

    Simulation of a dairy herd with the Simherd model. / Østergaard, Søren; Ettema, Jehan Frans; Sørensen, Jan Tind; Kudahl, Anne Braad.

    Proceeding Cattle Consultancy Days. 2008. p. 69-69.

    Research output: Contribution to book/anthology/report/proceedingConference abstract in proceedingsResearch

  44. Published

    Økonomi i at bruge kødkvægtyre til økologiske malkekøer. / Ettema, Jehan Frans; Sørensen, Jan Tind.

    In: Kvaeg, No. 8, 2008.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  45. 2007
  46. Published

    Use of sexed semen on herd level. / Ettema, Jehan Frans.

    In: KvaegInfo, No. 1799, 13.11.2007, p. 1.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  47. Published

    Kønssorteret sæd giver mange muligheder! / Fog, Anders; Kargo Sørensen, Morten; Ettema, Jehan; Ettema, Jehan Frans.

    In: KvaegInfo, Vol. 1785, 10.10.2007.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  48. Published

    Brug af kønssorteret sæd på besætningsniveau. / Ettema, Jehan Frans.

    In: Bovilogisk, Vol. 21, No. 8, 2007, p. 10-12.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  49. Published

    Brug af kønssorteret sæd på besætningsniveau. / Ettema, Jehan.

    Bilag, Dansk Kvæg, Kongres 2007. 2007. p. 16-17.

    Research output: Contribution to book/anthology/report/proceedingArticle in proceedingsResearch

  50. Published

    Forbedret økonomi ved brug af kønssorteret sæd. / Ettema, Jehan Frans.

    In: Kvægavleren, No. 5, 2007, p. 5-7.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  51. Published

    Rechnet sig gesextes Sperma? / Ettema, Jehan Frans.

    In: Elite, Magazin für Milcherzeuger, No. 5, 2007.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  52. Published

    The association of hoof lesions at claw trimming with test-day milk yield in Danish Holsteins . / Ettema, Jehan Frans; Capion, Nynne; Hill, Ashley E.

    In: Preventive Veterinary Medicine, No. 79, 2007, p. 224-243.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articlepeer-review

  53. 2006
  54. Published

    Hvad koster halthed hos køer? / Ettema, Jehan Frans.

    In: KvaegInfo, 11.12.2006, p. 1.

    Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal article

  55. Published

    Economic Decisions in Farm Animal Health. / Ettema, Jehan Frans; Kudahl, Anne Braad; Sørensen, Jan Tind.

    2006. Paper presented at Economic Decisions in Farm Animal Health - International workshop held at Research Centre Foulum, Foulum, Denmark.

    Research output: Contribution to conferencePaperResearch