Die chronologische Liste zeigt aktuelle Veröffentlichungen aus dem Forschungsbetrieb der Hochschule Weihenstephan-Triesdorf. Zuständig ist das Zentrum für Forschung und Wissenstransfer (ZFW).
Research investigating necrotic tail tips in dairy cows resulting in necrotic tissues is scarce. However, there is evidence that in dairy cattle tail tip necroses exist with high prevalence. In piglets, the latest research described tail and ear necroses not because of tail and ear biting only, but because of swine inflammation and necrosis syndrome (SINS). Besides tails and ears, SINS includes inflammation of claws, heels, and teats. In cattle, tail tip necroses are described mainly in fattening bulls. As known so far, these findings are often discussed related to slatted flooring, intensive housing systems and management strategies. However, an association with subacute rumen acidosis and laminitis is described. In order to investigate what kind of and how often tail tip alterations appear in dairy cattle, data of 87 German Holstein dairy cows were collected over a period of 12 months. All cows were evaluated for tail tip alterations, body condition score (BCS), and locomotion score (LMS) every two weeks. In addition, milk yield data resulting from performance testing were included. Thermographic images of the tails were taken once. Firstly, all kind of tail tip alterations were described and collected. After 6 months, we categorized the observed alterations and developed a tail scoring system. The scoring for each specified trait (tail tip, tail ring) ranged from 0 to 4. The overall prevalence for tail alterations was 94%. Especially tail tip alterations had a constantly high prevalence of 56%. Cows affected by an increased average tail tip score, showed higher locomotion scores compared to others (P = 0.02). The prevalence of ring-like tail alterations increased from first to second lactation cows from 9 to 46%. Regarding the BCS, lighter cows showed higher scores due to ring-like alterations than heavier cows (P = 0.054). The most often occurring anomalies of the tail were sports or scurf (21.6%), followed by verruca-like mass (10.2%), swelling (8.4%), and thinning (4.3%). The results and especially the scoring system can serve as a template for further studies considering larger samples sizes, to investigate prevalence for tail necroses and other tail anomalies in different herds and management systems. It was hypothesized, that an inflammatory condition in dairy cows showing up in altered/necrotic tail tips or rings exists, which is in relationship with claw disorders indicated by lameness. If so, the tail score of a cow could be used as health indicator to evaluate the health status in dairy production systems.
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Paula Maas,
Beata Grzegrzółka,
Philipp Georg Kreß,
Martin Oberle,
Michael Judas,
Prof. Dr. Prisca Kremer-Rücker
Paula Maas,
Beata Grzegrzółka,
Philipp Georg Kreß,
Martin Oberle,
Prof. Dr. Prisca Kremer-Rücker
Berechtigungen: Peer Reviewed
In vivo – determination of the fat content in mirror carps (Cyprinus carpio) using ultrasound, microwave and linear measurements (2019) Aquaculture 512 .
DOI: 10.1016/j.aquaculture.2019.734359
Carps are the third largest species in aquaculture worldwide and belong to the fish family ‘cyprinids’, which make up the largest part of aquaculture production. The production of lean carp is one of the main goals in the carp farming business. Carps are usually traded alive; in order to ensure product quality and achieve a high consumer acceptance, it is important to estimate the fat content of the living fish. Therefore, during this study, a total of 250 living carps were examined using a mobile ultrasound device. Additionally, a microwave technology based Fish Fatmeter (Distell, Fauldhouse, Scotland, UK) was used to determine the fat content of the living fish. Further measurements included weight, lengths, height and circumferences. The ultrasound measurements were performed on non-sedated fish using narrow water-filled containers. Two sagittal images per fish were taken to measure the backfat thickness at defined locations. Subsequently, the fish were taken out of the water in order to determine the fat content using the Fish Fatmeter. Weight and linear measurements were taken. After the in vivo measurements, about 10 fish per pond, in total 51 fish, were slaughtered and the fillets were analysed chemically. Linear regression models were developed. The Fish Fatmeter turned out to be an accurate method to determine the fat content of the fillet in mirror carps (R2 = 0.95). Regarding the ultrasound measurement of the backfat thickness, moderate correlations between ultrasound and Fish Fatmeter were achieved (R2 = 0.33–0.45). Pearson's correlation for linear measurement and the Fish Fatmeter showed negative prediction. In order to evaluate the relative backfat thickness, the ultrasound measurement was divided by linear measurements. The best correlation was found using the ultrasound measurement point where the backfat thickness reached a constant thickness divided by the circumference around the thinnest part of the tail fin (R2 = 0.74). In the next step, the carps were divided into groups of ten fish per pond. The mean Fish Fatmeter measurement and ultrasound measurement divided by circumference was calculated and correlated achieving an R2 of 0.92. Based on these findings, it seems plausible to estimate the fat content using a small sample of ten fish with an ultrasound device and a measuring tape.
Maren Bernau,
Sebastian Schwanitz,
Prof. Dr. Prisca Kremer-Rücker,
Lena Sophie Kreuzer,
Prof. Dr. Armin Manfred Scholz
Berechtigungen: Open Access
Berechtigungen: Peer Reviewed
Size matters: Boar taint in relationship with body composition and testis volume measured by magnetic resonance imaging (2018) Livestock Science 213 , S. 7-13.
DOI: 10.1016/j.livsci.2018.04.008
Sebastian Schwanitz,
Maren Bernau,
Lena Sophie Kreuzer,
Prof. Dr. Prisca Kremer-Rücker,
Prof. Dr. Armin Manfred Scholz
Berechtigungen: Peer Reviewed
Body composition and boar taint of intact boars, and immunologically or surgically castrated pigs (2017) Züchtungskunde 89 (6), S. 413-433.
Maren Bernau,
Prof. Dr. Prisca Kremer-Rücker,
Lena Sophie Kreuzer,
Sebastian Schwanitz,
Klaus Cussler,
Andreas Hoffmann,
Prof. Dr. Armin Manfred Scholz
Berechtigungen: Open Access
Berechtigungen: Peer Reviewed
Magnetic resonance imaging to detect local tissue reactions after vaccination in sheep in vivo (2017) Veterinary Record Open 4 (1), S. 1-7.
DOI: 10.1136/vetreco-2016-000200
Sophie Rothammer,
Maren Bernau,
Prof. Dr. Prisca Kremer-Rücker,
Ivica Medugorac,
Prof. Dr. Armin Manfred Scholz
Berechtigungen: Open Access
Berechtigungen: Peer Reviewed
Genome-wide QTL mapping results for regional DXA body composition and bone mineral density traits in pigs (2017) Archives Animal Breeding 60 (2), S. 51-59.
DOI: 10.5194/aab-60-51-2017
Maren Bernau,
Sebastian Schwanitz,
Lena Sophie Kreuzer,
Prof. Dr. Prisca Kremer-Rücker,
Prof. Dr. Armin Manfred Scholz
Are testis volume and boar taint related? - a trial in entire and immunocastrated boars (2016) Book of Abstracts (Vol. 22) of the 67th Annual Meeting of the European Federation of Animal Science, 29. August - 2. September 2016 in Belfast (UK) .
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Gerhard Radlmayr
Referent für Wissenstransfer und Forschungskommunikation
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