Gender on the growth of Criollo foals from birth to three years of age

Pimentel, Anelise Maria Hammes; Rodrigues, Wesley Osvaldo Pradella; Martins, Charles Ferreira; Montanez, Nathanael Ramos; Boligon, Arione Augusti; Souza, João Ricardo Malheiros de

doi:10.1590/0103-8478cr20150989

Cited by 10 publications

(12 citation statements)

References 7 publications

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“…Mota et al (2010) also concluded that males are generally taller than females. These differences between both sexes can be explained by sexual dimorphism: in males, secondary sexual characteristics influence the growth of tissues and, consequently, of body regions, which leads to differences in growth patterns related to height (Pimentel et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

“…Since the breed's inception less than 200 years ago, its biotype has become more athletic, with higher quality morpho-functional features for a saddle horse (Casiuch, 2016). In this context, several studies have evaluated the growth characteristics of the horses of this breed (Souza et al, 2017;Ribeiro et al, 2018); however, few of them take into account morphometric variables, such as body length and thoracic and cannon perimeters, in statistical modeling.…”

Section: Introductionmentioning

confidence: 99%

“…However, acquiring data on the Mangalarga Marchador breed is difficult because most horses are sold by their owners before their growth stops at approximately five years of age. The transversal method is a practical and inexpensive alternative that allows collecting variables in a single event, shown to be very efficient in evaluating human (Zeferino et al, 2003) and horse (Souza et al, 2017;Ribeiro et al, 2018) growth.…”

Section: Introductionmentioning

confidence: 99%

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Morphometric characteristics of the Mangalarga Marchador horse breed determined by nonlinear models

Souza

Fernandes

Cunha

et al. 2019

Pesq. agropec. bras.

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The objective of this work was to evaluate the development of the morphometric characteristics of Mangalarga Marchador horses through nonlinear models. The transversal method was used to collect data on height at the withers (HW), body length (BL), and thoracic (TP) and cannon (CP) perimeters from 200 horses (75 males and 125 non-pregnant females), aged between 6 and 153 months. The parameters of the Brody, Gompertz, logistic, and von Bertalanffy nonlinear models were estimated using the R software. Models were compared and selected using the coefficient of determination, the residual standard deviation, and the corrected Akaike information criterion. For adult females, HW, BL, TP, and CP ranged between 146.45-148.34, 148.59-151.64, 179.07-182.88, and 18.25-18.76 cm, respectively. For males, HW, BL, and CP ranged between 148.55-151.80, 150.77-154.88, and 18.95-19.41 cm, respectively. The logistic model best expresses growth in HW for males and females, as well as in BL and CP for males, whereas the Brody model is the best predictor for HW, BL, TP, and CP for females. The increase in the values of the morphometric measurements is more rapid and homogeneous between the ages of 6 and 24 months, stabilizing at 60 months in both sexes.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Morphometric characteristics of the Mangalarga Marchador horse breed determined by nonlinear models

Souza

Fernandes

Cunha

et al. 2019

Pesq. agropec. bras.

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“…The minimum measurement required for registry confirmation is 18 cm for males and 17 cm for females. Pimentel et al (2017) evaluated Criollo colts from birth to three years of age and found that males reached the minimum requirement for registration at 18 months of age, while females reached the minimum requirement for registration, on average, at 11 months of age. Males presented greater cannon bone circumferences.…”

Section: Discussionmentioning

confidence: 99%

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

et al. 2018

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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.

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“…CARROL & HUNTINGTON (1988) reported that horses' height at withers (r=0.75) and body length (r=0.62) were highly correlated with body weight, demonstrating the influence of morphometric variables on equine body development. At birth, a foal's height at withers is estimated to correspond to approximately 60% of the adult height and, at the end of its first year of life, to approximately 90% of the adult height (GREEN, 1969;GARCIA et al 2011;PIMENTEL et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Growth curve for height at withers and body length of Mangalarga Marchador horses

et al. 2020

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This study aimed to evaluate the logistic and quadratic response plateau models to describe the growth of Mangalarga Marchador horses to identify the model that best describes growth for the variables height at withers and body length. Data were used from 230 horses aged 6 to 176 months, divided by sex and 16 age classes. All computational work was performed using R statistical software. The logistic model was the best suited to express growth in height at withers and body length of male and female Mangalarga Marchadors aged 6 to 176 months. This allowed creating a table of reference values for these measurements over time based on the confidence interval of the model parameters. Estimates of height at withers obtained by the logistic model ranged from 144 to 154 cm in adult males and from 143 to 151 cm in adult females. For body length, values ranged from 146 to 156 cm in adult males and 143 to 156 cm in adult females. Females achieved stability in both height at withers and body length at earlier ages than did males.

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Gender on the growth of Criollo foals from birth to three years of age

Cited by 10 publications

References 7 publications

Morphometric characteristics of the Mangalarga Marchador horse breed determined by nonlinear models

Morphometric characteristics of the Mangalarga Marchador horse breed determined by nonlinear models

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

Growth curve for height at withers and body length of Mangalarga Marchador horses

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