Please use this identifier to cite or link to this item: http://repository.ucc.edu.co/handle/ucc/3311
Title: Efecto del apagado de la resistencia de la nacedora sobre la calidad del pollito
Effect of Cutting off Power to the Hatcher on the Quality of Chicks
Author: Avila, Frank
Nieto Pico, Javier Eduardo
Vargas Bayona, Javier Enrique
Keywords: deshidratación; embrio‑diagnóstico; ombligos; porcentaje nacimiento; temperatura
dehydration; embryo‑diagnosis; navels; birth rate; temperature
Description: El estudio pretendió evaluar la calidad del pollito cuando se modificó la temperatura de la máquina nacedora al final del ciclo de incubación. El experimento se realizó en una sola máquina nacedora (chick master®, génesis iii) con capacidad para nacimien‑to de 15.552 pollos. Se realizaron tres ensayos: primero se apagó la resistencia de la máquina nacedora 48 horas antes del nacimiento; luego, 24 horas antes, y en el tercero no se apagó la resistencia de la máquina. Se utilizó el mismo lote de huevos de reproductoras Cobb-Avian 48con edades de 32 y 33 semanas. Se evaluó la cicatrización del ombligo, pollito de primera (%), pollito de segunda (%), descarte (%), deshidratación (%). Para la realización del embrio‑diagnóstico se tuvo en cuenta la mortalidad tardía de pollitos y pica‑ dos no nacidos. El análisis estadístico fue descriptivo para cada una de las variables y se apoyó con el examen test físico de Cervantes en los pollitos nacidos. En el primer ensayo la cicatrización de ombligos fue de 93,8% en aves de primera, 0,5% de segunda y 0,5% de descarte; en el segundo 94,2% en aves de primera, 0,4% de segunda y 0,7% de descarte; en el tercero 92,9% en aves de primera, 0,7% de segunda y 0,6% de descarte. Se observó que la resistencia encendida todo el tiempo causó deshidratación en el 8% de los animales y un aumento de 0,2% en la mortalidad tardía y de 0,6% en malas posiciones con signos de estrés calórico
The study aimed to evaluate chick quality when the tempera‑ture was changed at the end of the incubation cycle. The experiment was performed on a single machine hatcher (chick master®, genesis III), with a capacity for births of as many as 15,552 chickens. There were 3 trials: in the first one, power was turned off to the hatcher machine 48 hours before birth; for the second trial it was turned off 24 hours prior to birth; finally, for the third trial power was not turned off. The same batch of Cobb‑Avian 48 egg layers ages 32 and 33 weeks was used. The percent‑age of navel healing was assessed for the first chicks, second chicks along with the discard percentage and dehydration percentage. In carrying out embryo diagnosis, late mortality and unborn chicks were taken into ac‑count. Statistical analysis was descriptive for each variable and was based on the Cervantes physical examination test performed on the hatched chicks. In the first trial, navel healing was 93.8% in first chicks, 0.5% in second chicks and 0.5% among discards. In the second trial, navel heal‑ing was 94.2% in first chicks, 0.4% in second chicks and 0.7% among discards. In the third trial, the figures were 92.9% among first chicks, 0.7% among second chicks and 0.6% among discards. It was found that when the power was always on, there was dehydration among 8% of the animals and a 0.2% increase in late mortality along with 0.6% in bad positions with signs of heat stress.
Publisher: Universidad Cooperativa de Colombia
Appears in Collections:Revista Spei Domus

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