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Freie Universität Berlin

1. Pütz, Angela Charlotte. Monitoring of seasonal influences, the effect of housing conditions and domestication on the horn quality of the equine hoof.

Degree: 2007, Freie Universität Berlin

In a yearlong field trial the effects of season, housing conditions, nutrition and domestication on the horn quality of the equine hoof were studied. The trial included twenty horses of two different housing systems with clinically asserted good and poor hoof horn quality. The sampling of hoof clippings and measurement of the hoof shape took place at regular intervals in line with the farriery. Furthermore, blood samples, hoof photos and samples of feedstuff were taken on three occasions. Laboratory analysis included physical material examination (water content and horn hardness), light- and scanning electron microscopy, analysis of the fatty acid content of hoof horn and feedstuff via gas chromatography as well as determination of the mineral and trace element status in the blood. In addition, a scoring for an objective assessment of the hoof horn quality was designed. Also the rate of horn production and changes in body weight were determined. Thus, the diversity of the methods employed in the study allowed to judge the interactions of the various factors affecting the horn quality. During the investigation period minor variations of the hoof shape were detected. In comparison with the Przewalski horse (SCHNITKER, 2004) these changes could not be associated with a certain season as they were a result of farriery. Compared to the Przewalski horses the hooves displayed an obtused angle. As described for the Przewalski horse (SCHNITKER, 2004) the rate of horn production was clearly reduced in winter in both stables. Seasonal changes in the water content of the hoof horn and horn hardness were also asserted and these were related to the housing system. In open stable housing the horses possessed the highest horn hardness in summer whereas the least hardness was measured in winter. On the other hand the water content was highest in wintertime. In contrast such seasonal changes could not be observed in indoor housing. Concerning the architecture of the hoof horn no seasonal changes were seen by means of light- and scanning electron microscopy. The architecture of the tubular as well as the lamellar horn was constant within the entire investigation period. An increased incidence of macroscopic and microscopic cracks in the hoof horn was detected in summer. Those cracks appeared frequently in association with a low humidity of the environment and brittle horn. Break-outs at the weight-bearing margin appeared more often in summer than in winter. Physiological horn rings were observed all year round, primarily in the hooves of horses and ponies in open stable housing. These horn rings were more dinstictive in summertime. Using gas chromatography slight seasonal changes in the fatty acid composition in hoof horn and feedstuff were detected. In feedstuff predominantly unsaturated fatty acids were found, whereas in hoof horn near the weight-bearing margin saturated fatty acids dominated. The total concentration of fatty acids in feedstuff and hoof horn declined simultaneously, but a difference in the fatty acid composition… Advisors/Committee Members: n (gender), Apl.-Prof. Dr. H. Bragulla (firstReferee), Univ.-Prof. Dr. K.-D. Budras (furtherReferee), Univ.-Prof. Dr. W.B. Hertsch (furtherReferee).

Subjects/Keywords: horses; equine hooves; horn quality; seasonality of horn quality; domestication; water content; horn hardness; fatty acids; minerals; trace elements; shape of hoof capsule; 600 Technik, Medizin, angewandte Wissenschaften::630 Landwirtschaft::630 Landwirtschaft und verwandte Bereiche

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APA (6th Edition):

Pütz, A. C. (2007). Monitoring of seasonal influences, the effect of housing conditions and domestication on the horn quality of the equine hoof. (Thesis). Freie Universität Berlin. Retrieved from https://refubium.fu-berlin.de/handle/fub188/10554

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Pütz, Angela Charlotte. “Monitoring of seasonal influences, the effect of housing conditions and domestication on the horn quality of the equine hoof.” 2007. Thesis, Freie Universität Berlin. Accessed August 07, 2020. https://refubium.fu-berlin.de/handle/fub188/10554.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Pütz, Angela Charlotte. “Monitoring of seasonal influences, the effect of housing conditions and domestication on the horn quality of the equine hoof.” 2007. Web. 07 Aug 2020.

Vancouver:

Pütz AC. Monitoring of seasonal influences, the effect of housing conditions and domestication on the horn quality of the equine hoof. [Internet] [Thesis]. Freie Universität Berlin; 2007. [cited 2020 Aug 07]. Available from: https://refubium.fu-berlin.de/handle/fub188/10554.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pütz AC. Monitoring of seasonal influences, the effect of housing conditions and domestication on the horn quality of the equine hoof. [Thesis]. Freie Universität Berlin; 2007. Available from: https://refubium.fu-berlin.de/handle/fub188/10554

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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