Validación del software KINOVEA® para la obtención de medidas zoométricas en bovinos charolais

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Calceta: ESPAM MFL

Abstract

El objetivo fue evaluar la confiabilidad del software Kinovea® (KV) para obtener medidas zoométricas en bovinos Charolais. Se midieron 60 hembras de raza Charolais mayores de dos años de edad en tres fincas en el cantón Tena, provincia de Napo. Se utilizaron zoometros de aluminio para medir alzadas a la grupa (AG) y a la cruz (AC), diámetro longitudinal (DL), dorso-esternal (DE), y dorsoventral (DV), longitudes del lomo (LL) y cabeza (LC). Las fotografías se calibraron con AG en el software Kinovea®, las variables no cumplieron con los supuestos de normalidad y homocedasticidad en diferentes casos, se aplicó estadística descriptiva y se analizaron los datos con la prueba de U de Mann-Whitney-WIlcoxson en el paquete estadístico InfoStat. Los resultados tuvieron una variación entre 5.19% y 8.36%, indicando variabilidad moderada y uniformidad media. No se encontró diferencia significativa (p>0,05) entre los dos métodos de medición en ninguna variable. Los promedios de las medidas manuales fueron AG 137,75±7,16 cm; AC 128,53±6,87 cm; DL 152,9±12,43 cm; DE 69,30±5,29; DV 72.97±5,84 cm; LL 103,92±6,77 y LC 50,40±3,59 cm. En el software KV se obtuvo promedios de AG 137,75±7,16 cm; AC 129,80±6.80 cm; DL 154,42±12,91 cm, DE 70,25±5,08; DV 74.30±5,74 cm; LL 105,18±6,89 y LC 50,93±3,90 cm. Estos resultados sugieren buena homogeneidad en el ganado Charolais, y validan el uso de KV para obtener las medidas zoométricas.

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The objective was to evaluate the reliability of the Kinovea® (KV) software for obtaining zoometric measurements in Charolais cattle. Sixty females Charolais over two years of age were measured on three farms in Tena canton, Napo province. Aluminum zoometers were used to measure height at the croup (AG) and at the withers (AC), longitudinal diameter (DL), dorso-sternal diameter (DE), and dorsoventral diameter (DV), as well as lengths of the loin (LL) and head (LC). Photographs were calibrated with AG in the Kinovea® software. The variables did not meet the assumptions of normality and homoscedasticity in various cases; descriptive statistics were applied, and the data were analyzed using the U Mann-Whitney-WIlcoxson test in the InfoStat statistical package. The results showed variation between 5.19% and 8.36%, indicating moderate variability and average uniformity. No significant differences (p > 0.05) were found between the two measurement methods for any variable. The averages of the manual measurements were AG 137.75 ± 7.16 cm; AC 128.53 ± 6.87 cm; DL 152.9 ± 12.43 cm; DE 69.30 ± 5.29 cm; DV 72.97 ± 5.84 cm; LL 103.92 ± 6.77 cm; and LC 50.40 ± 3.59 cm. In the KV software, the averages obtained were AG 137.75 ± 7.16 cm; AC 129.80 ± 6.80 cm; DL 154.42 ± 12.91 cm; DE 70.25 ± 5.08 cm; DV 74.30 ± 5.74 cm; LL 105.18 ± 6.89 cm; and LC 50.93 ± 3.90 cm. These results suggest good homogeneity in Charolais cattle and validate the use of KV for obtaining zoometric measurements.

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