Muda forzada o "reciclaje" de gallinas en piso

Force molting of laying hens housed in littered floor. Results of field studies. Very little information is available on force molting of hen flocks housed in floor and litter facilities instead of cages. A field study was conducted with 9Isa-Brown flocks averaging 8 100 hens per flock together with...

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Autores principales:	Zumbado-Alpízar, Mario, Solís, Javier, Ureña, Gustavo
Formato:	Online
Idioma:	spa
Publicado:	Universidad de Costa Rica 2013
Acceso en línea:	https://revistas.ucr.ac.cr/index.php/nutrianimal/article/view/10309

id	NUTRIANIMAL10309
record_format	ojs
spelling	NUTRIANIMAL103092022-12-08T17:13:12Z Muda forzada o "reciclaje" de gallinas en piso Zumbado-Alpízar, Mario Solís, Javier Ureña, Gustavo Force molting of laying hens housed in littered floor. Results of field studies. Very little information is available on force molting of hen flocks housed in floor and litter facilities instead of cages. A field study was conducted with 9Isa-Brown flocks averaging 8 100 hens per flock together with the information of one Isa-Babcock 8-300 white hen's flock. A conventional fasting and no artificial light molting program was implemented in all flocks. The fasting period averaged 13.2 days with a minimum of 9 and a maximum of 15 days. This was the necessary period of time for the flocks to stop laying eggs and lose enough body weight. Flocks stopped production at72.2days without feed (11 min, 13 max); however, two flocks never stopped laying hens and their lower laying rate was 0.9 and 0.4% hen-day. The white flock halted production after 6 days fasting. Average weight loss for the brown hens were 20 % and 24.2% at 10 and 14 days of fasting, respectively (18.3 and 27.3% for the white flock). The daily weight loss ranged from 1.7 to 2.2%. The day previous to start the molting program, the average laying rate was 70.3% hen-day (60.0-78.8%) at70.6 (65.0-76.0) weeks of age. From the first egg after molting to 50% production the flock average 17.6 (13.0-22.0) days and peak egg production was 77.2% (67.2-84.2%) hen-day. It took the brown hen flocks an average of 34 days to reach 50% egg production from the first day of fasting. The white flock lasted 41 days to reach 50% production. The brown flocks reached 69% (1.9-10.7%) egg production above the level they had the day previous to the start of the molting program and stayed 12 (6-21) weeks above that laying rate value. They remained for 2.2 (0-8) weeks above 80% hen-day egg production. Hen mortality average 0.35%/ week (0.11-0.85) during the 40 days after fasting started. These data with hens in littered floor are quite different compared to information available on force molting of flocks in cages. Universidad de Costa Rica 2013-06-04 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article Artículo application/pdf https://revistas.ucr.ac.cr/index.php/nutrianimal/article/view/10309 Nutrición Animal Tropical Journal; Vol. 4 No. 1 (1998): Nutrición Animal Tropical: January-june; 79-100 Nutrición Animal Tropical; Vol. 4 Núm. 1 (1998): Nutrición Animal Tropical: enero-junio; 79-100 2215-3527 spa https://revistas.ucr.ac.cr/index.php/nutrianimal/article/view/10309/9705 Derechos de autor 2014 Nutrición Animal Tropical
institution	Universidad de Costa Rica
collection	Nutrición Animal Tropical
language	spa
format	Online
author	Zumbado-Alpízar, Mario Solís, Javier Ureña, Gustavo
spellingShingle	Zumbado-Alpízar, Mario Solís, Javier Ureña, Gustavo Muda forzada o "reciclaje" de gallinas en piso
author_facet	Zumbado-Alpízar, Mario Solís, Javier Ureña, Gustavo
author_sort	Zumbado-Alpízar, Mario
description	Force molting of laying hens housed in littered floor. Results of field studies. Very little information is available on force molting of hen flocks housed in floor and litter facilities instead of cages. A field study was conducted with 9Isa-Brown flocks averaging 8 100 hens per flock together with the information of one Isa-Babcock 8-300 white hen's flock. A conventional fasting and no artificial light molting program was implemented in all flocks. The fasting period averaged 13.2 days with a minimum of 9 and a maximum of 15 days. This was the necessary period of time for the flocks to stop laying eggs and lose enough body weight. Flocks stopped production at72.2days without feed (11 min, 13 max); however, two flocks never stopped laying hens and their lower laying rate was 0.9 and 0.4% hen-day. The white flock halted production after 6 days fasting. Average weight loss for the brown hens were 20 % and 24.2% at 10 and 14 days of fasting, respectively (18.3 and 27.3% for the white flock). The daily weight loss ranged from 1.7 to 2.2%. The day previous to start the molting program, the average laying rate was 70.3% hen-day (60.0-78.8%) at70.6 (65.0-76.0) weeks of age. From the first egg after molting to 50% production the flock average 17.6 (13.0-22.0) days and peak egg production was 77.2% (67.2-84.2%) hen-day. It took the brown hen flocks an average of 34 days to reach 50% egg production from the first day of fasting. The white flock lasted 41 days to reach 50% production. The brown flocks reached 69% (1.9-10.7%) egg production above the level they had the day previous to the start of the molting program and stayed 12 (6-21) weeks above that laying rate value. They remained for 2.2 (0-8) weeks above 80% hen-day egg production. Hen mortality average 0.35%/ week (0.11-0.85) during the 40 days after fasting started. These data with hens in littered floor are quite different compared to information available on force molting of flocks in cages.
title	Muda forzada o "reciclaje" de gallinas en piso
title_short	Muda forzada o "reciclaje" de gallinas en piso
title_full	Muda forzada o "reciclaje" de gallinas en piso
title_fullStr	Muda forzada o "reciclaje" de gallinas en piso
title_full_unstemmed	Muda forzada o "reciclaje" de gallinas en piso
title_sort	muda forzada o "reciclaje" de gallinas en piso
publisher	Universidad de Costa Rica
publishDate	2013
url	https://revistas.ucr.ac.cr/index.php/nutrianimal/article/view/10309
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Muda forzada o "reciclaje" de gallinas en piso

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