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| Wallenbeck, Anna; Lundeheim, Nils; Rydhmer, Lotta. |
| De djur som används i ekologisk grisproduktion i Sverige idag är selekterade för hög produktion i konventionell miljö. I den här studien vill vi ta reda på om dessa djur även är de bästa i ekologisk miljö. Det gör vi genom att undersöka om det finns genotyp-miljö-sampel för slaktgrisegenskaper mellan ekologisk och konventionell miljö. Om det finns sådana samspel så är inte de bästa grisarna i konventionell miljö de bästa grisarna i ekologisk miljö och då finns det behov av ett eget ekologisk avelsarbete (Rydhmer m fl, 2003). Märkning och tatuering av smågrisar hos smågrisproducenten, identifiering av slaktkropparna på slakteriet och insamling av slaktkroppsdata går att genomföra i fält. Rangeringen mellan galtar efter ekologiskt fenotypiskt... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Breeding and genetics. |
| Ano: 2005 |
URL: http://orgprints.org/6409/1/wallenbeck195_200.pdf |
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| Wallenbeck, Anna; Rydhmer, Lotta. |
| The aim of this study was to describe sow and piglet traits and the relationship between them in animals bred for conventional production kept in organic outdoor and indoor environments. 40 sows were studied during a seven week lactation. In parity one and three the sows farrowed outdoors (April to September) in huts and were moved to family grazing paddocks two weeks post partum (pp). In parity two and four the sows farrowed indoors (October to March) in individual pens and were moved to family pens with deep straw bedding two weeks pp. High backfat and weight loss during lactation was related to low piglet mortality and the relationship was stronger outdoors than indoors. Large litters had lower piglet growth than small litters and the relationship was... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Pigs. |
| Ano: 2008 |
URL: http://orgprints.org/11691/1/Wallenbeck_11691_ed.doc |
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| Hultén, Fredrik; Wallenbeck, Anna; Rydhmer, Lotta. |
| Animal welfare concerns require the development of housing systems that allow the animals to express their natural behaviour. One example of this is the group-housing system for lactating sows. The present study aimed at exploring ovarian activity in such a system. Thirty-eight sows farrowing individually outdoors during spring and summer, and indoors during autumn and winter, and group-housed in groups of four during weeks 3–7 of the lactation period, were monitored regarding reproductive functions, behaviour and production during their first to fourth lactation period. Average ovulation frequency during lactation was 47%. Only 50% of these ovulating cases were accompanied by a standing oestrus. Lactational ovulation frequency was higher in later parities... |
| Tipo: Journal paper |
Palavras-chave: Pigs. |
| Ano: 2006 |
URL: http://orgprints.org/12674/1/j.1439%2D0531.2006.00691.x?cookieSet=1 |
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| Slagboom, Margot; Wallenbeck, Anna; Rydhmer, Lotta; Thomasen, Jørn Rind; Kargo, Morten. |
| Organic dairy farming (ODF) is different from conventional dairy farming in management practices, but so far the same breeding goal (BG) is used, based on the same economic models (EM). However, ODF is based on the principles of organic agriculture defined by the IFOAM, which are not easily interpreted in economic terms and it may be questionable to use a BG for ODF based on EM. In this study we set up three BGs for ODF in Denmark, one based on the principles of organic agriculture, one focusing on roughage consumption and feed efficiency, and one focusing on disease resistance. A questionnaire and desired gains index were used to set up the BGs. Correlations between these BGs and BGs based on EM were low. Which BG would be best suitable to use for ODF in... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Dairy cattle; Breeding and genetics. |
| Ano: 2018 |
URL: http://orgprints.org/33030/1/Slagboom_2018_BreedingGoalsForOrganicDairyFarming.pdf |
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| Slagboom, Margot; Wallenbeck, Anna; Rydhmer, Lotta; Thomasen, Jørn Rind; Kargo, Morten. |
| Organic dairy farming (ODF) is different from conventional dairy farming in management practices, but so far the same breeding goal (BG) is used, based on the same economic models (EM). However, ODF is based on the principles of organic agriculture defined by the IFOAM, which are not easily interpreted in economic terms and it may be uestionable to use a BG for ODF based on EM. In this study we set up three BGs for ODF in Denmark, one based on the principles of organic agriculture, one focusing on roughage consumption and feed efficiency, and one focusing on disease resistance. A questionnaire and desired gains index were used to set up the BGs. Correlations between these BGs and BGs based on EM were low. Which BG would be best suitable to use for ODF in... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Production systems; Dairy cattle; Breeding and genetics. |
| Ano: 2018 |
URL: http://orgprints.org/33256/1/Slagboom%20et%20al%20WCGALP%202018.pdf |
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