Publications - Publications en-us PURE Extension (Web Department) 30 <![CDATA[Vision analysis and prediction for estimation of pig weight in slaughter pens]]> Tu, G. J., Jørgensen, E. The potential of using computer vision to estimate the weight of pigs has been demonstrated in several studies. In this paper, we propose a Vision Analysis and Prediction (VAP) system, which consisted of two main parts: (1) computer vision – a vision algorithm was developed to segment the pigs and identify which pig area could be used to estimate the corresponding weight; (2) statistical analysis – a statistical method for predicting pig weight using the area was presented, including BLUP model and linear regression as well as a prediction function. The results showed that our approach has successfully estimated the weight of growing pigs (approximate ranges from 20 to 105 kg) with an accuracy of weight estimation of 97.76% on average for the predicted mean weight at pen level. The proposed system does not require modifications to the building and shows a strong potential to be utilized in pig weight estimation in slaughter pens.

Research Thu, 01 Jun 2023 11:56:29 +0200 e65142a6-1c94-4bc3-93c6-da458dbc855d
<![CDATA[Low-protein diets for broilers]]> Woyengo, T. A., Knudsen, K. E.Bach, Børsting, C. F. Amino acids (AA) are the second most expensive component of broiler diets after energy, and therefore their excessive inclusion in diets can result in significant increase in broiler feed cost. In addition to the increased feed cost, excessive intake of AA by broilers results in increased N excretion, which has negative impact on environment, and welfare of birds and caretakers. Also, excessive intake of AA by broilers results in increased excretion of water and hence increased litter moisture, which has negative impact on environment and welfare of birds. Finally, excessive intake of AA can result in increased production of toxic compounds in hindgut from AA post small intestinal digestion. Thus, methods to reduce dietary CP level without compromising performance of broilers will reduce feed costs and improve the environment, and may improve poultry health and welfare. The dietary level of CP can be reduced without compromising performance of broilers if the resulting low-CP diets are supplemented with crystalline AA to meet the AA requirements of broilers. By supplementing the diets with crystalline AA, the CP values in broiler starter, in this paper any period between hatch and approximately days 21 of age and finisher, in this paper any period between day 21 and day 42 of age, diets can be reduced from approximately 220 and 200 g/kg to 190 and 170 g/kg, respectively, without compromising growth performance of the broilers provided the digestible Lys, Met, Thr, and Val contents in low-CP diets are similar to those in the high-CP diets. The level of CP in broiler starter and finisher diets can be further reduced to 180 g/kg and 160 g/kg, respectively, without compromising growth performance of the broilers if the low-CP diets in addition are supplemented by Gly and the digestible content of Lys, Met, Thr and Val, and Gly are equivalent of the low-CP diets to those in the high-CP diets. Publications delineated in this text indicate several strategies to consider for reducing CP in broiler diets including: feed enzymes, soybean isoflavones, fatty acid type, and fiber type. All these strategies are discussed and gaps in knowledge are identified.

Research Wed, 01 Mar 2023 11:56:29 +0100 215b66be-8ce9-4436-b48a-4150a4ecdf76
<![CDATA[The effects of part-time dam-contact and stepwise weaning and separation on the voluntary human approach behaviour of dairy calves]]> Bertelsen, M., Steinerová, K., Jensen, M. B. Dairy calves are commonly reared without contact with their dam, which facilitates a human-animal relationship based on close human contact and feeding. Dam-contact may negatively affect calves’ relationship with humans. The current study investigates the effect of dam-contact and weaning method on calves’ response to humans. A total of 69 dairy calves were allocated to one of three dam-contact treatments [Control (separated from dam after 24 h), Whole-day (housed with dam for 23 h/d), and Half-day (housed with dam for 10 h/d)]. Within each treatment, calves were allocated to one of two weaning treatments [Stepwise (weaning off milk at eight weeks, dam-separation/pen change at nine weeks) or Simultaneous (weaning off milk and dam-separation/pen change simultaneously at nine weeks), i.e Control were weaned in the same manner but only the pen change was possible at the separation step, as calves were already separated from the dam]. All animals received a similar amount of human contact, except control calves who were additionally fed milk by teat bucket twice a day. Calves were tested in a random order within block using a human approach test followed by an animal approach test conducted in a 2.5 m x 10 m arena at 10 weeks of age. Stepwise-Control calves had shorter latencies to first approach the test person than Stepwise-Whole-day (p < 0.05, median survival time of Stepwise-Control: 11 s, Stepwise-Whole-day: 111 s and Stepwise-Half-day: 52 s). Among Simultaneous calves, no dam-contact treatment differences were detected for the latency to first approach. Similarly, Stepwise-Control calves had an odds ratio (95% CI) of 24.2 (1.6–365.9, p < 0.05) for coming within 1 m of the test person vs Stepwise-Whole-day calves and 12.5 (1.1–141.1, p < 0.05) vs Stepwise-Half-day calves. Throughout the test period Simultaneous-Control vocalised less [estimated mean no. of vocalisations (95% CI), 3.6 (2.1–6.4)] than both Simultaneous-Whole-day [18.2 (12.8–25.9), p < 0.01] and Simultaneous-Half-day [15.7 (11.0–22.5), p < 0.01] while there was no difference under Stepwise. As expected, Control approached faster and were more likely to come close to the test person than dam-reared calves, but exclusively after the stepwise weaning and separation. For calves tested one week after simultaneous weaning and separation no effect of the dam-contact treatments was found, except a higher frequency of vocalisations for dam-reared calves. This implies that controlling for the stress level related to weaning and separation from the dam is important when interpreting human-animal relationship tests, as dam-contact treatment effects appeared to be affected by high levels of weaning stress.

Research Wed, 01 Mar 2023 11:56:29 +0100 0f83b34c-cc47-49ce-a724-f1cb2e4e641c
<![CDATA[Dynamics of fatty acid and non-volatile polar metabolite profiles in colostrum and milk depending on the lactation stage and parity number of sows]]> Settachaimongkon, S., Homyog, K., Mekboonsonglarp, W., et al. The objective of this study was to investigate the impact of lactation stage and parity number on fatty acid and non-volatile polar metabolite profiles in sow colostrum and milk using a metabolomics approach. A total number of 63 colostrum, transient and mature milk were collected from primiparous and multiparous Landrace × Yorkshire crossbred sows. Macrochemical, fatty acid and non-volatile polar metabolite compositions of samples were analyzed using infrared spectrometry, gas chromatography coupled with mass-spectrometry and proton nuclear magnetic resonance spectroscopy, respectively. Univariate and multivariate statistical analysis demonstrated significant impacts of lactation stage and parity number on colostrum and milk compositions. Chemometric analysis revealed significant influences of sow parity on the distinction in fatty acid profiles of mature milk while the distinction in non-volatile polar metabolite profiles was more evident in colostrum. Alterations in the concentration of linoleic (C18:2n6), lignoceric (C24:0), behenic (C22:0), caprylic (C8:0) and myristoleic (C14:1) acid together with those of creatine, creatinine phosphate, glutamate and glycolate were statistically suggested to be mainly affected by sow parity number. Variations in the concentration of these compounds reflected the physiological function of sow mammary gland influenced. This information could be applied for feed and feeding strategies in lactating sows and improving lactating performances.

Research Fri, 01 Dec 2023 11:56:29 +0100 42118966-0124-49a0-8a13-55245f5c52fd
<![CDATA[Carcass characteristics of Nordic native cattle breeds]]> Therkildsen, M., Vestergaard, M., Kargo, M. ., et al. production. In this study, net gain and carcass characteristics of two Danish, three Finnish, one Icelandic, six Norwegian and five Swedish native cattle breeds were retrieved and compared to commercial breeds: two beef breeds and two dairy breeds. Breed data were collected from national databases and sorted into six animal categories: young bull, bull, steer, heifer, young cow and cow, for which means and standard deviations were calculated within each country. The native breeds ranged from small-sized milking type breeds with low net gain, carcass weights and EUROP classification to larger multipurpose breeds with high net gains, carcass weights and EUROP classification. All Finnish and most of the Norwegian and Swedish native breeds had lower net gain and carcass weight than the dairy breeds in the same category and country, but with similar carcass conformation and fatness scores. The two Danish native breeds had higher net gain, carcass weight and conformation class than the reference dairy breed, but lower than the reference beef breeds. The net gain and carcass traits of the Icelandic native breed were similar to the smallest-sized native breeds from the other countries. The carcass traits of the native breeds indicate that they have comparative advantages in an extensive production system based on forage and marginal grasslands. They may also succeed better in the value-added markets than in mainstream beef production.]]> Research Wed, 01 Feb 2023 11:56:29 +0100 6e5c754d-89fa-47ba-bdfd-6c2bc609bd59 <![CDATA[Kapitel 7 Næringsstofudskillelse fra får og geder, ab dyr – Normtal for husdyrgødning 2021/2022]]> Lund, P. Communication Sat, 01 Jan 2022 11:56:29 +0100 cf4a26bd-62d7-4bb4-8870-1c8d1f1da10c <![CDATA[Kapitel 6 Næringsstofudskillelse fra heste, ab dyr - Normtal for husdyrgødning 2021/2022]]> Børsting, C. F., Clausen, E. Communication Sat, 01 Jan 2022 11:56:29 +0100 1d2eea9e-53b9-4401-ac51-109a52d83cd7 <![CDATA[Effekten af 3-NOP afhænger af dosis og grovfodertype]]> Maigaard, M., Weisbjerg, M. R., Lund, P., Olson, C., Walker, N. Communication Tue, 30 Aug 2022 11:56:29 +0200 dae60548-88fd-4ff1-9e18-1712d232d684 <![CDATA[Administration of procaine-based local anaesthetic prior to surgical castration influences post-operative behaviours of piglets]]> Coutant, M. P., Malmkvist, J., Tallet, C., et al. Research Sun, 01 Jan 2023 11:56:29 +0100 a22e7fb3-23a8-4e83-847e-f073fe813cf4 <![CDATA[Effect of abomasal amino acid infusions on performances and metabolism in postpartum dairy cows]]> Bahloul, L., Hernandez Castellano, L. E., Lapierre, H., Schwab, C.G., Larsen, M. Research Thu, 01 Sep 2022 11:56:29 +0200 df0e5dee-6454-41ce-9396-45e1b728bd2c <![CDATA[Fremtidens klimaeffektive fodring (af kvæg)]]> Nielsen, M. O., Thorsteinsson, M. M., Rønn, M., et al. Research Tue, 01 Nov 2022 11:56:29 +0100 62361204-930e-486c-a076-b054f8506bdf <![CDATA[Stof X reducerer køernes metan emission - uden forringelse af mælkeproduktion eller fodereffektivitet?]]> Nielsen, M. O., Thorsteinsson, M. M., Rønn, M., et al. Research Mon, 01 Aug 2022 11:56:29 +0200 e685851e-bf99-407f-9aa9-052583945816 <![CDATA[Potential for use of seaweed as feed for ruminant livestock?]]> Thorsteinsson, M. M., Weisbjerg, M. R., Lund, P., Bruhn, A., Nielsen, M. O. Research Sat, 01 Oct 2022 11:56:29 +0200 287bde40-6221-4f30-a1c6-7b3107b33809 <![CDATA[Broad targeting of C-type lectin receptors and TLR3 by a cationic adjuvant formulation (CAF09) combined with pustulan in chicken subunit vaccines may support cell mediated immunity]]> Dalgaard, T. S., Kjærup, R. B., Larsen, F. T., et al. Research Mon, 01 Aug 2022 11:56:29 +0200 b27c530b-3a93-40bc-bb05-ecd055f40f03 <![CDATA[The welfare impact of heat stress in modern breeds of broiler chickens]]> Schuck-Paim, C., Wurtz, K. E., Alonso, W. Research Sat, 01 Jan 2022 11:56:29 +0100 7f2c1783-a153-43b8-9e7d-b4a75cdc046f <![CDATA[Quantifying the Welfare Impact of Cardiorespiratory Problems in Broilers]]> Wurtz, K. E., Schuck-Paim, C., Alonso, W. Research Sat, 01 Jan 2022 11:56:29 +0100 077712c3-b4c5-48b5-9f8b-a69c8778c1c7 <![CDATA[Potential of depth images to monitor feeder access in growing pigs]]> Larsen, M. L. V., Norton, T. Research Thu, 01 Sep 2022 11:56:29 +0200 49f0e270-27eb-4ab0-b163-e89aac3e8d77 <![CDATA[Investigation and application of tracking algorithm on behaviour analysis for weaners housed in two-climate pens]]> Wang, M., Larsen, M. L. V., Liu, D., Norton, T. Research Thu, 01 Sep 2022 11:56:29 +0200 d639b7af-2c12-4739-a80f-c57d74e93907 <![CDATA[Assessment of open-source programs for automated tracking of individual pigs within a group]]> Wurtz, K. E., Norton, T., Siegford, J., Steibel, J. Research Fri, 09 Sep 2022 11:56:29 +0200 385d5440-bc3d-42b1-a712-ff982f9aac35 <![CDATA[First step to remote detection of locomotor play in young pigs]]> Larsen, M. L. V., Wang, M., Willems, S. ., Liu, D., Norton, T. Research Thu, 01 Sep 2022 11:56:29 +0200 ef7ebb7b-87fe-4d28-9d4d-7e3f8e053d86 <![CDATA[Unge køer foretrækker madro]]> Thomsen, P. T. Communication Thu, 01 Dec 2022 11:56:29 +0100 6b9b8fff-3250-466f-9d27-ec4335233d85 <![CDATA[Steps and barriers in the development of a PLF system for welfare monitoring: tail biting in growing pigs as example]]> Larsen, M. L. V., Norton, T., Pedersen, L. J. Research Thu, 01 Sep 2022 11:56:29 +0200 ef29e21e-a7a9-4c7a-bdb2-da2d170f9396 <![CDATA[Nye forsøg med protein til ungdyr]]> Vestergaard, M. ., Johansen, M., Madsen, P. A., Martinussen, H., Lund, P. Communication Mon, 01 Aug 2022 11:56:29 +0200 ad3333e1-d193-4be7-876f-392ceb2c722f <![CDATA[Udledning af drivhusgasser fra husdyrproduktionen i Danmark]]> Børsting, C. F. Communication Fri, 01 Apr 2022 11:56:29 +0200 8733b962-90a5-4d05-add7-6518b79fc2ff <![CDATA[Normtal 2022/23 - Tabeller for næringsstofudskillelse]]> Børsting, C. F., Hellwing, A. L. F. Communication Mon, 01 Aug 2022 11:56:29 +0200 0c44deaa-e2d9-4433-9607-6ea4db4f487f <![CDATA[A new methanotrophic bacteria derived protein feed can be included in weaner diets without negative impacts on piglet performance and intestinal health in the post weaning period]]> Hedemann, M. S., Rønn, M., Julegaard, I. K., Nielsen, M. O. Research Wed, 01 Jun 2022 11:56:29 +0200 e19eb756-8f62-4bca-b74f-b6c73467ee05 <![CDATA[Det er elendig formidling, at en bog om dansk landbrug ikke lader en dyreetiker komme til orde]]> Anneberg, I. Communication Tue, 06 Dec 2022 11:56:29 +0100 22aea7f9-323b-4024-b6f5-aa76923b1f59 <![CDATA[Fald i tilvækst hen over efteråret]]> Myhlendorph-Jarltoft, T., Vestergaard, M. . Communication Tue, 01 Nov 2022 11:56:29 +0100 d995f844-2378-43bb-bace-1a5e569b4b75 <![CDATA[Kornbærme – et prisfordelagtigt alternativ til protein- og cellevægsholdige råvarer]]> Myhlendorph-Jarltoft, T., Vestergaard, M. . Communication Mon, 01 Aug 2022 11:56:29 +0200 d1fa7ab4-daa3-4e86-8e2c-438514793bbb <![CDATA[Normtal for husdyrgødning 2022/2023]]> Børsting, C. F. Communication Tue, 01 Nov 2022 11:56:29 +0100 7cd21874-d307-4cc8-a6da-4ec2885f8afc <![CDATA[Kapitel 7 Næringsstofudskillelse fra får og geder, ab dyr – Normtal for husdyrgødning 2022/2023]]> Lund, P. Communication Sat, 01 Jan 2022 11:56:29 +0100 65a3a16b-27b8-4127-b9c8-3c6f5095c72d <![CDATA[Kapitel 6 Næringsstofudskillelse fra heste, ab dyr – Normtal for husdyrgødning 2022/2023]]> Børsting, C. F., Clausen, E. Communication Tue, 01 Nov 2022 11:56:29 +0100 58c473aa-4003-4063-b119-b8de1e7a7dd8 <![CDATA[Kapitel 4 Næringsstofudskillelse fra fjerkræ, ab dyr – Normtal for husdyrgødning 2022/2023]]> van der Heide, M. E., Børsting, C. F., Hellwing, A. L. F., Jensen, . H. B. Communication Mon, 01 Aug 2022 11:56:29 +0200 70334399-4111-4994-b1c2-982f5b2d3000 <![CDATA[Kapitel 3 Næringsstofudskillelse fra kvæg, ab dyr – Normtal for husdyrgødning 2022/2023]]> Lund, P., Børsting, C. F., Martinussen, H. Communication Thu, 01 Dec 2022 11:56:29 +0100 0f7b6c8a-98db-4ab4-abef-bbc55f104bbd <![CDATA[Kapitel 2 Næringsstofudskillelse fra svin, ab dyr]]> Sørensen, M. T., Tybirk, P., Hellwing, A. L. F., Børsting, C. F. Communication Thu, 01 Dec 2022 11:56:29 +0100 e00dde07-9f83-48c7-a472-67103bece2ef <![CDATA[Kapitel 5 Næringsstofudskillelse fra pelsdyr, ab dyr – Normtal for husdyrgødning 2022/2023]]> Møller, S. H. Communication Thu, 01 Dec 2022 11:56:29 +0100 68a5eaad-7314-4dbe-902a-7ba99bf14d26 <![CDATA[Plantecocktail reducerer diarré hos økologiske fravænningsgrise]]> Jerez-Bogota, K. S., Hojberg, O., Jensen, M., Canibe, N. Communication Wed, 01 Jun 2022 11:56:29 +0200 e09495a2-720b-4cee-8629-1d3af4f4deaf <![CDATA[Prevalence of conflict behaviour in Icelandic horses during elite competition]]> Christensen, J. W., Jensen, D. Research Mon, 01 Aug 2022 11:56:30 +0200 7aa0eee0-2c63-4e46-ac88-dd09007deeed <![CDATA[Plantecocktail reducerer colibakterier hos øko-smågrise]]> Jerez-Bogota, K. S., Hojberg, O., Jensen, M., Canibe, N. Communication Fri, 01 Jul 2022 11:56:30 +0200 711d0cd3-deb6-4e1c-a9fa-92a9edccdc20 <![CDATA[Plantecocktail reducerer colibakterier hos øko-smågrise]]> Jensen, M., Jerez-Bogota, K. S., Hojberg, O., Canibe, N. Communication Tue, 01 Mar 2022 11:56:30 +0100 e1b52e4b-7216-4d89-9c91-3bfa2a0f0d3d <![CDATA[Transcriptomic analysis of circulating leukocytes obtained during the recovery from clinical mastitis caused by escherichia coli in Holstein dairy cows]]> Cheng, Z., Palma-Vera, S., Buggiotti, L., et al. Escherichia coli as a causative pathogen for bovine mastitis is influenced by the hosts’ phenotypic and genotypic variables. We used RNA-Seq analysis of circulating leukocytes to investigate global transcriptomic profiles and genetic variants from Holstein cows with naturally occurring cases of clinical mastitis, diagnosed using clinical symptoms and milk microbiology. Healthy lactation-matched cows served as controls (CONT, n = 6). Blood samples were collected at two time periods during the recovery phase post diagnosis: EARLY (10.3 ± 1.8 days, n = 6) and LATE (46.7 ± 11 days, n = 3). Differentially expressed genes (DEGs) between the groups were identified using CLC Genomics Workbench V21 and subjected to enrichment analysis. Variant calling was performed following GATKv3.8 best practice. The comparison of E. coli(+) EARLY and CONT cows found the upregulation of 1090 DEGs, mainly with immune and inflammatory functions. The key signalling pathways involved NOD-like and interleukin-1 receptors and chemokines. Many up-regulated DEGs encoded antimicrobial peptides including cathelicidins, beta-defensins, S100 calcium binding proteins, haptoglobin and lactoferrin. Inflammation had largely resolved in the E. coli(+) LATE group, with only 29 up-regulated DEGs. Both EARLY and LATE cows had up-regulated DEGs encoding ATP binding cassette (ABC) transporters and haemoglobin subunits were also up-regulated in LATE cows. Twelve candidate genetic variants were identified in DEGs between the infected and CONT cows. Three were in contiguous genes WIPI1, ARSG and SLC16A6 on BTA19. Two others (RAC2 and ARHGAP26) encode a Rho-family GTPase and Rho GTPase-activating protein 26. These results show that the initial inflammatory response to E. coli continued for at least 10 days despite prompt treatment and provide preliminary evidence for genetic differences between cows that may predispose them to infection.]]> Research Sun, 21 Aug 2022 11:56:30 +0200 93d4ca3c-316e-4e3a-8aea-58d97df77633 <![CDATA[Feeding antibacterial plant combinations to mitigate post-weaning diarrhoea in organic piglets challenged with enterotoxigenic Escherichia coli F18]]> Jerez-Bogota, K. S., Hojberg, O., Jensen, M., Canibe, N. Research Sat, 01 Jan 2022 11:56:30 +0100 87fff365-a058-470a-9640-c2aea19d62dc <![CDATA[Quantifying specific behaviours related to positive and negative broiler welfare]]> Williams, S., Rasmussen, S. N., Lui, D., Mounir, M., Riber, A. B., Norton, T. Research Thu, 01 Sep 2022 11:56:30 +0200 abe488a7-f18c-4b94-84e0-f423841ff1ea <![CDATA[Effect of dark brooders on activity level in layer pullets]]> Sirovnik, J., Martin-Cirera, A., Dunn, M., Oczak, M., Riber, A. B. Research Mon, 01 Aug 2022 11:56:30 +0200 2a1e25e9-6110-4df0-b820-716cde97faa3 <![CDATA[Resting behaviour of broilers reared with or without artificial brooders]]> Forslind, S., Hernandez, C., Riber, A. B., Wall, H., Blokhuis, H. Research Mon, 01 Aug 2022 11:56:30 +0200 1b8fc960-da59-4924-8365-32bc869dcdd6 <![CDATA[Characterizing age-related changes in walking ability and welfare of broiler chickens with sound and poor gait and the effects of stocking density in commercial barns]]> Yoder, H., Riber, A. B., Norton, T., Erasmus, M. Research Fri, 01 Jul 2022 11:56:30 +0200 f193a6de-c4c4-4298-bd44-f8f90af9255c <![CDATA[<i>Preslaughter Handling and Slaughter of Meat Animals</i>. Edited by L Faucitano (2022). Published by Wageningen Publishers, PO Box 220, 6700 AE Wageningen, The Netherlands. 436 pages Hardback (ISBN: 978-90-8686-372-3). Price €99.00]]> Herskin, M. S. Research Tue, 01 Nov 2022 11:56:30 +0100 2219f7da-f7d7-473d-921d-70c4e3f5bfb4 <![CDATA[Coupling the benefits of grassland crops and green biorefining to produce protein, materials and services for the green transition]]> Jørgensen, U., Jensen, S. K., Ambye-Jensen, M. Compared with annual grain and seed crops, perennial grassland has significantly lower losses of nutrients and low pesticide requirements, whilst also supporting soil carbon build-up. Until now grassland crops have almost exclusively been fed to ruminants and horses. Our experiments on biorefining forages have produced protein of a quality equal to soybean meal. Forage crops can deliver high yields of biomass as well as protein with a well-balanced amino acid profile. In grass crops from unfertilised permanent grassland, focus has to be on the fibre part of the grass due to a low protein yield. With current techniques we have recovered up to 40% of the forage protein into a protein concentrate with around 50% protein. In addition, a fibre fraction containing 15%–18% protein of dry matter can be produced and used as ruminant feed, bioenergy, or further biorefined into chemical building blocks or bio-materials. Our feeding experiments have shown that biorefined grassland protein can provide a substitute for soybean meal for poultry and pigs without negative effects on animal performance. The first industrial scale biorefineries on green biomass for feed and bioenergy are now established in Denmark, although more research is needed in order to evaluate protein quality for both feed and food applications. In addition, a full EFSA approval has to be obtained for the application for food. The green biorefinery concept opens new markets for grassland and opportunities for increasing the grassland area to obtain associated ecosystem services.

Research Thu, 01 Dec 2022 11:56:30 +0100 300cbbb5-d3ab-4312-abf7-4c053954d823
<![CDATA[Impact of feeding level on nutrient digestibility and concentrations of plasma metabolites in transition sows]]> Feyera, T., Nørskov, N., Knudsen, K. E. B., Bruun, T. ., Theil, P. K. apparent total tract digestibility (ATTD) of gross energy (GE), nutrients
and concentrations of plasma metabolites in transition sows. We hypothesized
that nutrient digestibility decline and concentrations of plasma
metabolites increase with increasing feeding levels. Forty-eight sows
were assigned to six feeding levels (1.8, 2.4, 3.1, 3.7, 4.3 and 5.0 kg/
d) from day 108 of gestation until farrowing. Faecal samples were collected
on day 114 of gestation, whereas plasma samples were collected
at farrowing. Klason lignin measured as acid insoluble residues in the
feed ingredients was used as an internal marker to estimate ATTD of
GE and nutrients. Data were analysed using general linear mixed model
by including feeding levels and parity as the fixed effects and sow as the
random effect. Plasma concentrations of urea (P0.001) and butyrate (P< 0.001) increased, whereas that of non-esterified
fatty acids (Plevel. The ATTD of GE (Psimilar trends, in which ATTD were greatest at 1.8 and 2.4 kg/d, intermediate
at 3.1 kg/d and lowest at ≥ 3.7 kg/d for both parameters. The
ATTD of non-starch polysaccharides (NSP) was greatest at 2.4 and 3.1
kg/d, intermediate at 3.7 and 4.3 kg/d and lowest at 5.0 kg/d (P
0.001). The ATTD of GE, fat and NSP were greater in sows than in gilts
(Pand urea increased with increasing feeding level, indicating increased
fermentation and protein oxidation, whereas the decreased concentration
of non-esterified fatty acids with increasing feeding level implied
a reduced body reserve mobilization. Increased feeding level also
decreased the ATTD of GE, protein and NSP but to different extents.]]>
Research Fri, 01 Jul 2022 11:56:30 +0200 f758e7f5-02ea-42c7-b88e-79a85c2872c4
<![CDATA[Assessment of the control measures of the category A diseases of Animal Health Law]]> Nielsen, S. S., Alvarez, J., Bicout, D. J., et al. EFSA received a mandate from the European Commission to assess the effectiveness of some of the control measures against diseases included in the Category A list according to Regulation (EU) 2016/429 on transmissible animal diseases ('Animal Health Law'). This opinion belongs to a series of opinions where these control measures will be assessed, with this opinion covering the assessment of control measures for glanders. In this opinion, EFSA and the AHAW Panel of experts review the effectiveness of: (i) clinical and laboratory sampling procedures, (ii) monitoring period and (iii) the minimum radius of the protection and surveillance zone, and the minimum length of time the measures should be applied in these zones. The general methodology used for this series of opinions has been published elsewhere. Considering the epidemiology and distribution of glanders, it was foreseen that three different situations could lead to a suspicion of the disease. Sampling procedures were defined for each of the three different suspicion types, which can also be applied in most of the other scenarios assessed. The monitoring period (6 months) was assessed as effective in all scenarios. The AHAW Panel of experts considered the minimum radius and duration of the existing protection and surveillance zone, set at the establishment level, effective. Recommendations provided for each of the scenarios assessed aim to support the European Commission in the drafting of further pieces of legislation, as well as for plausible ad hoc requests in relation to glanders.

Research Sat, 01 Jan 2022 11:56:30 +0100 b61d7a84-d931-4d0c-a4ce-377d409139b2