Aplicación de técnicas fotogramétricas para el estudio morfométrico en caballos criollos colombianos

Abstract

ABSTRACT: To study the morphological conformation of horses, external measurement techniques known as “zoometric techniques” have been used, which are laborious processes that make it difficult to obtain immediate results. Currently, there are other techniques such as photogrammetry, which has been used successfully in other countries, but its use in this country is unknown and therefore not used in veterinary medicine. In this study, we used a photogrammetric program for the morphometric study of horses through a modified methodology. The results obtained with this technique were compared with zoometric measurements and so the degree of variation between them was determined. To carry out the study, five horses of both sexes, located in the farm Las Palmas, La Florida district, Municipality of  Villamaría, Caldas, were used. A series of labels with reference to anatomical regions of interest were placed in the forelimb and hind limb of each individual, and then each animal was placed in a previously prepared ground where three lateral plane photographs were taken which were then processed with Photomodeler Scanner 6.2 software. The results obtained with the software did not show significant differences in relation to the in vivo measurements obtained through zoometric techniques, resulting in an average margin of error of 0.24%, thus demonstrating the degree of accuracy when obtaining longitudinal measures from the horses’ lateral plane. Based on studies applying photogrammetric techniques, this is recommended as an efficient, accurate and reliable software tool for the morphometric study of horses.

Keywords:

equino

morfología

photomodeler

zoometría

horses

photogrammetry

morphometry

zoometry

References

Anderson, T.M.; Mcllwraith, C.W. Longitudinal development of equine conformation from weanling to age 3 years in the Thoroughbred. Equine veterinary journal, v.36, n.7, p.563- 570, 2004.

Aparicio, G. Exterior de los grandes animales domésticos. 1.ed. Córdoba, Argentina: Editorial Moderna, 1956. 343p.

Barr, A.R. Carpal conformation in relation to carpal chip fracture. The Veterinary Record, v.134, n.25, p.646-650, 1994.

Belloy, E.; Bathe, A.P. The importance of standardising the evaluation of conformation in the horse. Equine veterinary journal, v.28, n.5, p.429- 430, 1996.

De la Peña, A.; Pérez, L.M.; González-Alique, F; Arana, P. Utilización de técnicas fotogramétricas para el estudio de la morfología del caballo. Archivos de zootecnia, v.55, n.211, p.309- 312, 2006.

Dressel, C. Die objektive messung der gliedmassenstellung beim pferd mittels photogrammetrie: Evaluation einer neuen methode. Zürich, Alemania: Universidad de Zurich, 2002. 110p. Tesis (PhD, University of Zürich).

Eksell, P.; Axelsson, M.; Broström, H. et al. Prevalence and risk factors of bone spavin in Icelandic horses in Sweden: a radiographic field study. Acta veterinaria Scandinavia, v.39, n.3, p.339-348, 1998.

Holmström, M. The effects of conformation. In: Equine Locomotion. 1.ed. Philadelphia, USA: Editorial Clayton, 2001. 295p.

Hunt, W.F.; Thomas, V.G.; Stiefel, W. Analysis of video-recorded images to determine linear and angular dimensions in the growing horse. Equine veterinary journal, v.31, n.5, p.402- 410, 1999.

Kronacher, O.; Ogrizek, A. Exterieur und Leistungsfähigkeit des Pferdes unter besonderer Berücksichtigung der Gliedmaßen winkelung und Schrittlängen verhältnisse. Journal of animal breeding and genetics, v.23, n.1, p.138-228, 1932.

Lage, M.; Bergmann, J.A.G.; Procópio, A.M. et al. Asociación entre medidas lineales y angulares de equinos da raza Mangalarga Marchador. Archivo brasilero de Medicina Veterinaria y Zootecnia, v.61, n.4, 2009.

Magnusson, L.E.; Thafvelin, B. Studies on the Conformation and Related Traits of Standardbred Trotters in Sweden. Journal of animal breeding and genetics, v.107, n.6, p.136-148, 1985.

Negretti, P.; Bianconi, G. Morphological survey through computerized image analysis. In: VII Conferencia mundial de criadores de raza Bruna, 2004, Viterbo. Memorias… Universidad de Viterbo, Italia; 2004, p.7.

Waite, J.; Schrader, W.; Mellish, J. et al. Threedimensional photogrammetry as a tool for estimating morphometrics and body mass of Steller sea lions (Eumetopias jubatus). Canadian Journal of Fisheries and Aquatic Sciences, v.4, n.2, p.296-303, 2007.

Weller, R.; Pfau, T.; Babbage, D. et al. Reliability of conformational measurements in the horse using a three-dimensional motion analysis system. Equine Veterinary Journal, v.38, n.7, p.610-615, 2006.