Biometric evaluation of Criollo horses participating in the Freio de Ouro competition, Brazil

Abstract

The objective of this study was to quantify linear and angular morphological measurements of male and female horses participating in the Freio de Ouro competition. This study represents the first scientific evaluation of the biometrics of the Criollo breed, providing essential information for the evaluation of the development of the breed and supporting objective selection. We examined linear and angular measurements of 634 Criollo horses participating in the Freio de Ouro competition in 2011 and 2012, including height, chest circumference, cannon bone circumference, body length, metatarsus length, croup length, chest width, head length, dorsal neck length, throat circumference, and angles of the croup, scapula, and hock. Statistical analysis showed that males had a greater average cannon bone circumference (19.76 cm) than females (18.95 cm) and a greater throat circumference (77.66 cm for males and 73.30 cm for females). None of the other traits evaluated differed between genders. The average height (141.73 cm for males and 141.41 cm for females) was close to the minimum requirement for the breed standard. Subjective observations suggesting that animals of this breed are decreasing in size were not confirmed in this study, as the height and other evaluated measures did not differ between competing horses less or more than seven years of age. Although these measurements in isolation do not indicate the qualities of individual animals, they serve as valuable auxiliary elements for selection work, showing breed tendencies and providing objective data to support technical decisions of judges regarding conformation.

Association of morphometric measurements with morphologic scores of Criollo horses at Freio de Ouro: a path analysis

“…This result suggests that in the last few decades, the rump has become less inclined (more flattened). This was also observed by Pimentel et al (2018) in adult Criollo horses attending Freio de Ouro, in which younger animals, up to seven years of age, had a tendency to lower rump angles (21.9º) than animals aged more than seven years (22.7º), showing a trend in the valuation of animals with more horizontal rumps.…”

“…Linear measurements of withers height, thoracic girth, cannon bone girth, body length, metatarsus length, croup length, shoulder width, head length, neck length, upper neck girth, and the angles of rump, shoulder, and hock were taken on the left side of the standing animal, with all four legs on a horizontal and even floor. These measurements are described in Pimentel et al (2018).…”

Mamíferos del Holoceno de la Provincia de Entre Ríos, Argentina

“…(Dowdall, 1982). Un estudio reciente realizado en caballos de Brasil reporta una longitud menor, en torno a los 208 ±10 mm, y concluyen que no existen diferencias significativas en cuanto al género o edad (Pimentel et al, 2018). Metatarsos más largos están asociados con una mejor eficiencia locomotora y predisposición al galope (Sobczuk & Komosa, 2012).…”

Segmentation and Classification of Criollo Horses using Deep Learning

“…The Criollo breed has been on a constant rise in recent years. The Brazilian Association of Criollo Horse Breeders (ABCCC) [1] preserves and spreads the breed in the country along with important competitions such as the Freio de Ouro [2], which evaluates the morphological and functional optimization of the Criollo horse.…”

“…However, there are several morphological characteristics to be evaluated in these horses. One of these characteristics is its balance, based on bone and muscle structure that directly affects the functional movements of the horse, impacting its health as an athlete horse [2].…”