Variabilidad en el crecimiento de cabritos Saanen bajo crianza artificial en la provincia de Buenos Aires, Argentina
; Gortari Castillo, Lihuel
; Cordiviola, Carlos Angel ; Moré, Gastón Andrés
; Arias, R. O. Otros responsables
Fecha
12/2023
Editorial
Universidad Nacional Mayor de San Marcos. Facultad de Medicina Veterinaria
Revista
Revista de Investigaciones Veterinarias del Peru
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ISSN
1609-9117
eISSN
1682-3419
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Español
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Resumen
Este estudio se llevó a cabo para determinar los factores de variación en el crecimien-to de crías Saanen en un tambo comercial de la provincia de Buenos Aires, Argentina. Seevaluó el sexo y peso inicial de las crías, y el número de lactancia, tipo y época de partode las madres. Se trabajó con 164 cabritos en 2019. Se registró el peso a los 20 días (P20)de edad y cada 15 ± 3 días hasta la etapa final de la crianza artificial (75 ± 5 días). Se calculóla ganancia diaria de peso (GDP) a partir del P20 y final (P75). Se utilizó el análisis devarianza multifactorial para evaluar el efecto del número de lactancia, tipo y época departo de las madres y peso inicial de las crías sobre GDP y P75. La GDP y P75 de las críasPesadas (131 ± 4.42 g/día y 12.4 ± 0.3 kg) y nacidas en Invierno (143 ± 5.22 g/día y 12.7 ±0.3 kg) fue significativamente superior a las Livianas (117 ± 3.65 g/día y 10.83 ± 0.2 kg) y nacidas en Primavera (105 ± 7.32 g/día y 10.4 ± 0.4 kg). Se concluye que la selección deanimales de mayor peso inicial y nacidos en invierno permitirían optimizar el proceso decrianza artificial.
This study was carried out to determine the variation factors in the growth of Saanen offspring in a commercial dairy farm in the province of Buenos Aires, Argentina. The sex and initial weight of the offspring were evaluated, as well as the number of lactations, type and season of delivery of the dams. The study included 164 kids born in 2019. Body weight was recorded at 20 days (P20) of age and every 15 ± 3 days until the final stage of artificial rearing (75 ± 5 days). Daily weight gain (GDP) was calculated from P20 to final (P75). Multivariate analysis of variance was used to evaluate the effect of lactation number, type and season of delivery of the dams, and initial weight of the offspring on GDP and P75. The GDP and P75 of the Heavy kids (131 ± 4.42 g/day and 12.4 ± 0.3 kg) and those born in Winter (143 ± 5.22 g/day and 12.7 ± 0.3 kg) were significantly higher than the Light kids (117 ± 3.65 g/day and 10.8 ± 0.2 kg) and born in Spring (105 ± 7.32 g/day and 10.4 ± 0.4 kg). It is concluded that the selection of animals with higher initial weight and born in winter would allow the artificial breeding process to be optimized.
This study was carried out to determine the variation factors in the growth of Saanen offspring in a commercial dairy farm in the province of Buenos Aires, Argentina. The sex and initial weight of the offspring were evaluated, as well as the number of lactations, type and season of delivery of the dams. The study included 164 kids born in 2019. Body weight was recorded at 20 days (P20) of age and every 15 ± 3 days until the final stage of artificial rearing (75 ± 5 days). Daily weight gain (GDP) was calculated from P20 to final (P75). Multivariate analysis of variance was used to evaluate the effect of lactation number, type and season of delivery of the dams, and initial weight of the offspring on GDP and P75. The GDP and P75 of the Heavy kids (131 ± 4.42 g/day and 12.4 ± 0.3 kg) and those born in Winter (143 ± 5.22 g/day and 12.7 ± 0.3 kg) were significantly higher than the Light kids (117 ± 3.65 g/day and 10.8 ± 0.2 kg) and born in Spring (105 ± 7.32 g/day and 10.4 ± 0.4 kg). It is concluded that the selection of animals with higher initial weight and born in winter would allow the artificial breeding process to be optimized.
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