Djurmaterialets betydelse i ekologisk grisproduktion

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 produktionsvärde och konventionellt produktionsavelsvärde skiljer sig, vilket tyder på att det kan finnas genotyp-miljö-samspel för slaktgrisegenskaper mellan ekologisk och konventionell produktion

Social Support in a Novel Situation Aimed for Stunning and Euthanasia of Pigs May Be Increased by Familiar Pigs-A Behavioural Study with Weaners

Simple Summary None of the approved methods for stunning pigs prior to slaughter is ideal from an animal welfare viewpoint. A method involving use of high-expansion foam to encapsulate nitrogen gas has recently been proposed as an alternative humane stunning method. The method is effective, but the foam itself induces some distress to individually exposed pigs. This study evaluated the effects of companionship from a familiar or unfamiliar conspecific during air-filled foam exposure on pigs' behavioural response. Companionship was found to be related to lower activity levels and fewer escape attempts. When comparing companionship with familiar and unfamiliar conspecifics, it was found that pig pairs with familiar individuals spent more time in physical contact during foam exposure, possibly seeking social support. The results highlight the importance of contact with conspecifics when studying animal welfare and demonstrates the potential benefits of maintaining stable familiar pig groups up to the point of stunning at slaughter. The common method of stunning pigs using high concentration carbon dioxide prior to slaughter poses an animal welfare issue, as the gas is aversive. Proof of concept for using nitrogen gas encapsulated in high-expansion foam as an alternative non-aversive method for stunning pigs has recently been presented. However, the individually tested pigs showed distress-related responses to foam exposure, regardless of whether it was nitrogen- or air-filled. This study examined the effect of companionship from a familiar or unfamiliar pig on behaviours in 72 nine-weeks old pigs during exposure to air-filled foam. Escape attempts were observed by 75% of solitary pigs, 42% of pigs with unfamiliar conspecifics, and 33% of pigs with familiar conspecifics. Familiar pig pairs clearly preferred social contact during foam exposure, whereas this was not as clear in unfamiliar pig pairs, and their motivation for social contact could have multiple explanations. The results from this study highlight the importance of contact with conspecifics when studying animal welfare and suggest that familiarity between pigs is important for social support, thus emphasizing the importance of maintaining social groups to reduce distress in pigs at slaughter

Leg health, growth and carcass characteristics in growing-finishing pigs of two different genotypes reared on Swedish organic farms

Increased prevalence of joint abnormalities at slaughter among pigs from organically certified herds in Sweden has been reported. Most of these abnormalities are caused by osteochondrosis, which has a genetic background. Thus, we investigated whether changing the sire breed from the commonly used Hampshire to the commercially available sire breed Duroc affected joint health and growth rate. We studied 766 commercially reared growing-finishing pigs from insemination of the mother sow until slaughter. The pigs were raised at four commercial organic farms (integrated or externally integrated, and had 40–160 sows in production)and slaughtered at one slaughter plant. We found no significant difference between the offspring of the two sire breeds regarding back conformation, leg conformation, swollen joints, locomotion or lameness at 13 or 24 weeks of age, or regarding joint abnormalities at slaughter. This indicates that clinical leg health will not be improved by changing sire breed. However, the Hampshire-sired pigs had higher daily growth rate(P< 0.008), allowing earlier slaughter

Norwegian dairy farmer's preferences for breeding goal traits and associations with herd and farm characteristics

The aims of this study were to investigate variation and clustering in breeding goal trait preferences among Norwegian dairy farmers and to identify factors with a systematic influence on their preferences. An internet-based questionnaire was sent out to dairy farmers connected to the Norwegian co-operative breeding organization Geno (N = 8222), of which 10.8% answered (N = 888). Of the 15 suggested traits fertility had the highest overall ranking, while parasite resistance and methane emission had the lowest. Four distinct preference clusters were identified by the means of cluster analysis, of which two had a high preference for milk production. Differences in terms of farm and herd characteristics between clusters suggests a mixture of systematic and intrinsic effects on breeding goal trait priorities. This study shows that Norwegian dairy farmers’ preferences for breeding goal traits fall into four distinct clusters, both affected by herd and farm characteristics along with intrinsic value

Improving animal health and welfare in organic cattle milk production through breeding and management

Overall summary of main results, discussion and conclusions WP1 The aim in WP1 was to map the performance of local breeds compared to commercial dairy breeds on organic farms in Austria, Switzerland, Sweden, Poland and Germany with regard to health associated traits, fertility and production traits. In a study covering the whole population of the selected breeds, managed under organic conditions during the period 1.7.2011 to 30.6.2014, we found lower milk yields for local breeds. In general we found better fertility performance (less days open, shorter calving intervals, lower number of inseminations) for at least one of the local breeds involved in each country. We also detected lower proportions of milk records with somatic cell counts above 100.000 cells/ ml milk for in at least one of the local breeds in Austria, Switzerland and Sweden, but not so for Poland where the commercial breed performed best. Moreover, we found a lower proportion of test day records with a fat: protein ratio above 1.5 in the first 100 days in milk for many local breeds (Grey Cattle (AL) and Original Braunvieh (OB) in Switzerland. AL by trend in Austria, Swedish Red (SRB) in Sweden and Polish Red and White (ZR) in Poland) hinting at a lower risk of subclinical ketosis for some of the local breeds compared to the respective commercial breed. We could not find breed differences regarding overall occurrence of veterinary treatments or those due to fertility or leg/ claw problems in Austrian data, but found that AL had less treatments due to udder problems than the commercial Braunvieh (BV). In Sweden, the local breed SRB had less overall treatments, fewer treatments due to fertility or udder disorders and also showed less remarks on claw or leg disorders than the commercial breed. We did not find breed differences regarding treatments due to metabolic disorders in Swedish data. We analyzed Austrian and Swiss data from culled cows on productive life span and detected a superiority of local breeds for this trait, but higher lifetime production (kg ECM) in the commercial breed. The second study on cows managed under very similar conditions in Sweden (period: 1.7.2011 to 30.6.2014) and Germany (period 1.7.2011 to 30.6.2015) revealed no significant breed differences in total ECM yield in German data, while we found higher milk fat and milk protein contents for the local breed Original Red Angler Cattle breed (AAZ). In Sweden, we found the highest ECM yield in the commercial breed Swedish Holstein (SH). The local breed Swedish Polled (SKB) had the highest fat and protein contents, followed by the second local breed Swedish Red (SRB), both differed significantly from the respective commercial breed SH and also among each other. We could not detect significant breed differences in the German data set with regard to fertility traits, although the local AAZ tended to have fewer days open than the commercial breed HO. In Sweden, we did not find breed differences for calving interval, but both local breeds had fewer days open, and SKB needed fewer inseminations compared to SH. No breed differences in any of the two countries regarding the proportion of test day records with a SCC content of over 100.000 cells per ml milk was found. We assessed the risk of subclinical ketosis during the first 100 days in milk by comparing fat protein ratios (FPR), applying differing thresholds in Germany (AAZ >1.7, HO >1.5) per breed, without detecting breed differences. However, in Sweden (with a threshold of >1.5) where the local SRB performed best, SKB showed an intermedium position, while SH had the highest proportion of FPR >1.5. Occurrence of veterinary treatments and those due to fertility problems did not differ between German breeds. Data on treatment due to metabolic disorders and leg or claw problems had low incidences, but models did not converge. In Sweden, we found the lowest incidence of overall veterinary treatments and treatments due to mastitis in the local breed SRB, but the local breed SKB did not differ from the commercial SH in neither of the two traits. We did not find breed differences regarding veterinary treatments due to fertility problems or diagnosis of claw/leg problems during claw trimming in the Swedish data set. Incidences of treatments due to metabolic disorders were low in all Swedish breeds, but models for this trait failed to converge. From our finding’s we conclude that local breeds partly have advantages with regard to many functional traits studied and that their potential should be better exploited in future, especially on farms with a medium production level (most clearly shown in the small study on German and Swedish farms). We also found overall high proportions of test day records with elevated SCC in Germany and even more so in Poland from which we deduct a great potential for further overall management improvement regardless of the involved breeds in these countries

Lameness in piglets - should pain killers be included at treatment?

Background: Joint swelling and lameness are the most obvious and persistent clinical signs of infectious arthritis in piglets. For a positive treatment effect of piglets with arthritis, early initiated treatments with antibiotics are desired. Hitherto pain-reducing drugs have rarely been used within veterinary medicine, but the potential of non steroid anti-inflammatory drugs (NSAID) are interesting from an animal welfare perspective. Therefore, the aim of this study was to compare the long term efficiency of treating lameness with and without pain relief. Further, the incidences of affected joints in lame piglets were analysed. Results: In total 415 of the 6,787 liveborn piglets included in the study were diagnosed with lameness (6.1 %). Around 86 % of these diagnoses took place during the first 3 weeks of life. There was no difference in the incidence of lameness between the sexes, but lameness was most commonly diagnosed in the offspring to old sows (>4 parturitions). Lameness was diagnosed in about every second litter and on average about two pigs were diagnosed in the affected litters. The incidence of affected litters as well as affected piglets increased with ageing of the sows. Treatments with antibiotics solely and in combination with NSAID improved (P &lt; 0.01 to 0.001) the clinical status from day to day, but the clinical response did not differ between the two treatment groups. Piglets that remained healthy were 1.1 and 1.7 kg heavier (P &lt; 0.001) than piglets diagnosed with lameness at 5 and 9 weeks of age, respectively. There were no differences in piglet body weights between the treatment strategies at any time. Conclusions: The clinical response to penicillin was good. It was neither improved nor reduced by a concurrent administration of NSAIDs. Nevertheless NSAIDs may improve the animal welfare due to pain relief. An important finding of this study was that decreasing pain due to lameness not was negative in a long term perspective, i.e. reducing pain did not lead to overstrain of affected joints and no clinical signs of adverse effects were noted. Therefore the use of NSAIDs ought to be considered to improve the animal welfare, at least in severe cases

Juice from silage in green bio refineries - a potential feed ingredient in liquid diets to weaned pigs

The objective of this study was to evaluate silage juice from green bio refineries in liquid diets to pigs and its' effect on growth, cleanliness and health. Ninety-six (L x Y) x H organically raised pigs were fed either a control diet (C-diet) or a silage feed juice diet (SFJ-diet). The C-diet consisted of a commercial feed mixed with water prior to feeding. The SFJ-diet consisted of a lower ration of commercial feed mixed with silage feed juice (SFJ) instead of water, theoretically replacing 10% of the dietary crude protein content. All pigs consumed the juice and grew similarly, on average 0.48 kg/day. SFJ pigs were significantly dirtier on their back and head than C pigs (P < 0.001 for all), but cleanliness in the rectum area and in the pen did not differ. Silage juice had only minor effects on hygienic measures and could be a potential local feed ingredient to pigs

A formal model for assessing the economic impact of animal welfare improvements at bovine and porcine slaughter

The relationship between animal welfare at slaughter and slaughterhouse profitability is complex, with potential trade-offs between animal welfare costs and benefits. Slaughterhouses currently lack data support for decisions on investments that can improve both animal welfare and profitability. Therefore, this study mapped the economic impacts for slaughterhouse businesses of improved cattle and pig welfare at slaughter. Specific aims were to: (i) highlight the possible economic impact of animal welfare improvements, based on the scientific literature; (ii) develop an economic model demonstrating the theoretical contribution of animal welfare to slaughterhouse profitability; and (iii) validate the economic model through focus group interviews with slaughterhouse personnel in Sweden. The findings indicated that investing in animal welfare improvements could result in accumulation of an intangible asset that can be considered together with other production factors in the economic model. Model validation stressed the importance of selling by-products for the economic outcome and of smooth workflow for productivity. The study thus improves understanding of the economic impacts of animal welfare at slaughter and incentives for slaughterhouse businesses to improve animal welfare. The results are important for public and private policy-makers interested in enhancing animal welfare at slaughter

Organic dairy breeding lines? – Possibilities and Requirements

Genomic breeding schemes with large cow reference populations will give room for more line division within dairy cattle breeding and therefore also for organic breeding lines. The reason is that different economic values between organic and conventional production systems are expected in the future and the existence of genotype by environment interaction will presumably be even more recognized. Therefore, correlations between organic and conventional breeding goals are expected to be significantly lower than one. This in combination with increased future “break even” correlations opens up for specific organic breeding lines