Establishment of Uropygial Gland Growth Curves for White, Three-Way Crossed Mule Ducklings
Autor(a) principal: | |
---|---|
Data de Publicação: | 2015 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Journal of Poultry Science (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000200209 |
Resumo: | Growth curves for the uropygial gland (UG) of white, 3-way crossed mule ducklings were established using the Gompertz function. In total, 144 ducklings were fed in 12 floor pens with 12 birds in each pen. Each pen contained an equal number of animals of each sex. Feed and water were supplied ad libitum throughout the entire experimental period. The weekly change in UG weight was recorded in males and females from hatch to 8 weeks of age. The weight and length of the UG, the width of the lobus glandulae uropygialis, the length and width of the pluma of the circulus uropygialis, and the index of the papilla uropygialis were measured once a week in individual ducklings in one pen. The average UG weight gain observed in white, 3-way crossed drakes was significantly higher than that of ducks of 21-56 days of age (P < 0.05). The UG length was 1.64-2.23 times the width of the left or right lobe, and the development of the UG was delayed from 3-4 weeks of age. The morphology of the UG changed from elliptical to elongated-elliptical with age. The right and left lobus glandulae uropygialis were symmetrical. The Gompertz growth functions of the UG in drakes and ducks were W=5.49e -e-0.675(t-1.955) and W=4.76e -e-0.685(t-1.936), respectively, where t represents age in weeks. These equations indicated that the maximum growth rate for drakes occurred at 14.1 days of age and for ducks at 13.6 days of age. |
id |
FACTA-1_6af3f15a3c0526b9b8fdb550dddff012 |
---|---|
oai_identifier_str |
oai:scielo:S1516-635X2015000200209 |
network_acronym_str |
FACTA-1 |
network_name_str |
Brazilian Journal of Poultry Science (Online) |
repository_id_str |
|
spelling |
Establishment of Uropygial Gland Growth Curves for White, Three-Way Crossed Mule DucklingsGompertz functionmule ducksuropygial gland growth curveGrowth curves for the uropygial gland (UG) of white, 3-way crossed mule ducklings were established using the Gompertz function. In total, 144 ducklings were fed in 12 floor pens with 12 birds in each pen. Each pen contained an equal number of animals of each sex. Feed and water were supplied ad libitum throughout the entire experimental period. The weekly change in UG weight was recorded in males and females from hatch to 8 weeks of age. The weight and length of the UG, the width of the lobus glandulae uropygialis, the length and width of the pluma of the circulus uropygialis, and the index of the papilla uropygialis were measured once a week in individual ducklings in one pen. The average UG weight gain observed in white, 3-way crossed drakes was significantly higher than that of ducks of 21-56 days of age (P < 0.05). The UG length was 1.64-2.23 times the width of the left or right lobe, and the development of the UG was delayed from 3-4 weeks of age. The morphology of the UG changed from elliptical to elongated-elliptical with age. The right and left lobus glandulae uropygialis were symmetrical. The Gompertz growth functions of the UG in drakes and ducks were W=5.49e -e-0.675(t-1.955) and W=4.76e -e-0.685(t-1.936), respectively, where t represents age in weeks. These equations indicated that the maximum growth rate for drakes occurred at 14.1 days of age and for ducks at 13.6 days of age.Fundacao de Apoio a Ciência e Tecnologia Avicolas2015-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000200209Brazilian Journal of Poultry Science v.17 n.2 2015reponame:Brazilian Journal of Poultry Science (Online)instname:Fundação APINCO de Ciência e Tecnologia Avícolas (FACTA)instacron:FACTA10.1590/1516-635x1702209-218info:eu-repo/semantics/openAccessChen,YHPeh,HCRoan,SWeng2016-10-20T00:00:00Zoai:scielo:S1516-635X2015000200209Revistahttp://www.scielo.br/rbcahttps://old.scielo.br/oai/scielo-oai.php||rvfacta@terra.com.br1806-90611516-635Xopendoar:2016-10-20T00:00Brazilian Journal of Poultry Science (Online) - Fundação APINCO de Ciência e Tecnologia Avícolas (FACTA)false |
dc.title.none.fl_str_mv |
Establishment of Uropygial Gland Growth Curves for White, Three-Way Crossed Mule Ducklings |
title |
Establishment of Uropygial Gland Growth Curves for White, Three-Way Crossed Mule Ducklings |
spellingShingle |
Establishment of Uropygial Gland Growth Curves for White, Three-Way Crossed Mule Ducklings Chen,YH Gompertz function mule ducks uropygial gland growth curve |
title_short |
Establishment of Uropygial Gland Growth Curves for White, Three-Way Crossed Mule Ducklings |
title_full |
Establishment of Uropygial Gland Growth Curves for White, Three-Way Crossed Mule Ducklings |
title_fullStr |
Establishment of Uropygial Gland Growth Curves for White, Three-Way Crossed Mule Ducklings |
title_full_unstemmed |
Establishment of Uropygial Gland Growth Curves for White, Three-Way Crossed Mule Ducklings |
title_sort |
Establishment of Uropygial Gland Growth Curves for White, Three-Way Crossed Mule Ducklings |
author |
Chen,YH |
author_facet |
Chen,YH Peh,HC Roan,SW |
author_role |
author |
author2 |
Peh,HC Roan,SW |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Chen,YH Peh,HC Roan,SW |
dc.subject.por.fl_str_mv |
Gompertz function mule ducks uropygial gland growth curve |
topic |
Gompertz function mule ducks uropygial gland growth curve |
description |
Growth curves for the uropygial gland (UG) of white, 3-way crossed mule ducklings were established using the Gompertz function. In total, 144 ducklings were fed in 12 floor pens with 12 birds in each pen. Each pen contained an equal number of animals of each sex. Feed and water were supplied ad libitum throughout the entire experimental period. The weekly change in UG weight was recorded in males and females from hatch to 8 weeks of age. The weight and length of the UG, the width of the lobus glandulae uropygialis, the length and width of the pluma of the circulus uropygialis, and the index of the papilla uropygialis were measured once a week in individual ducklings in one pen. The average UG weight gain observed in white, 3-way crossed drakes was significantly higher than that of ducks of 21-56 days of age (P < 0.05). The UG length was 1.64-2.23 times the width of the left or right lobe, and the development of the UG was delayed from 3-4 weeks of age. The morphology of the UG changed from elliptical to elongated-elliptical with age. The right and left lobus glandulae uropygialis were symmetrical. The Gompertz growth functions of the UG in drakes and ducks were W=5.49e -e-0.675(t-1.955) and W=4.76e -e-0.685(t-1.936), respectively, where t represents age in weeks. These equations indicated that the maximum growth rate for drakes occurred at 14.1 days of age and for ducks at 13.6 days of age. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-06-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000200209 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000200209 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1516-635x1702209-218 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Fundacao de Apoio a Ciência e Tecnologia Avicolas |
publisher.none.fl_str_mv |
Fundacao de Apoio a Ciência e Tecnologia Avicolas |
dc.source.none.fl_str_mv |
Brazilian Journal of Poultry Science v.17 n.2 2015 reponame:Brazilian Journal of Poultry Science (Online) instname:Fundação APINCO de Ciência e Tecnologia Avícolas (FACTA) instacron:FACTA |
instname_str |
Fundação APINCO de Ciência e Tecnologia Avícolas (FACTA) |
instacron_str |
FACTA |
institution |
FACTA |
reponame_str |
Brazilian Journal of Poultry Science (Online) |
collection |
Brazilian Journal of Poultry Science (Online) |
repository.name.fl_str_mv |
Brazilian Journal of Poultry Science (Online) - Fundação APINCO de Ciência e Tecnologia Avícolas (FACTA) |
repository.mail.fl_str_mv |
||rvfacta@terra.com.br |
_version_ |
1754122512986275840 |