Zobrazeno 1 - 10
of 112
pro vyhledávání: '"J. V. Craig"'
Publikováno v:
Poultry Science. 75:1308-1314
A selected line of White Leghorns that has shown improved survivability and productivity and reduced feather loss in multiple-hen cages was evaluated for production traits under both stressed and unstressed conditions. It was hypothesized that hens s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4e1e5f9f3630f62212f95e51e902ad73
https://doi.org/10.3382/ps.0751308
https://doi.org/10.3382/ps.0751308
Publikováno v:
Poultry Science. 75:1315-1320
A selected line of White Leghorns, which has shown improved survivability and reduced feather loss in large multiple-hen cages, was evaluated for humoral immune response to SRBC under both stressed and unstressed conditions. Three lines of chickens (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d942eec8eca3a3567fda2c84aedecf16
https://doi.org/10.3382/ps.0751315
https://doi.org/10.3382/ps.0751315
Autor:
William M. Muir, J. V. Craig
Publikováno v:
Poultry Science. 75:1145-1155
Three stocks of White Leghorns were compared for behavioral traits when kept in single-bird (1H) and 12-hen (12H) layer-house cages. Genetic stocks consisted of a commercial strain (X), a randombred control (C), and a stock derived from C and selecte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e952ebdb9f61cda7163d1f74de806645
https://doi.org/10.3382/ps.0751145
https://doi.org/10.3382/ps.0751145
Autor:
William M. Muir, J. V. Craig
Publikováno v:
Poultry Science. 75:294-302
The hypothesis was tested that selection on the basis of family means for increased survival and hen-housed egg production, when sisters with intact beaks were kept together in multiple-bird cage, would cause adaptive changes in behavior. Specificall
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e5f96fc10c36ada4f4b9a95831847cd
https://doi.org/10.3382/ps.0750294
https://doi.org/10.3382/ps.0750294
Autor:
J. V. Craig, William M. Muir
Publikováno v:
Poultry Science. 72:411-420
The effectiveness of selection for hen-days without beak-inflicted injuries was studied. The base population was known to have a high incidence of beak-inflicted injuries when pullets' beaks were intact. Data from the foundation stock yielded nonsign
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33521dcc0ee59b0f18bfc3305e493399
https://doi.org/10.3382/ps.0720411
https://doi.org/10.3382/ps.0720411
Autor:
J. V. Craig
Publikováno v:
Poultry Science. 71:2007-2013
The current study examined the effects of three beak treatments and three genetic stocks of White Leghorn pullets on part-year egg production and losses from cannibalistic pecking. Special attention was directed towards the consistency of beak treatm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50fe934034241d54b293190c55bf4b4f
https://doi.org/10.3382/ps.0712007
https://doi.org/10.3382/ps.0712007
Autor:
J. V. Craig, J.K. Apple
Publikováno v:
Applied Animal Behaviour Science. 35:149-155
Twenty-four crossbred gilts, averaging 4 weeks of age and 9.4 kg, were weighed and allotted to either a large pen with a space allowance of 0.8 m2 per pig or a small pen with a space allowance of 0.4 m2 per pig (12 gilts per pen). Pigs were offered f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7354700e696f19a13accdcfc427d9233
https://doi.org/10.1016/0168-1591(92)90005-v
https://doi.org/10.1016/0168-1591(92)90005-v
Autor:
J. V. Craig
Publikováno v:
Poultry Science. 71:650-657
Social behavior of poultry is discussed in general terms, variables having major effects are indicated, and frequently used techniques of measurement are presented and compared. Studies in which different variables and methods were described are pres
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::23e3ebda74f3489322a72b8c6d76a00f
https://doi.org/10.3382/ps.0710650
https://doi.org/10.3382/ps.0710650
Publikováno v:
Poultry Science. 71:391-394
Experiments with pullets were conducted to determine whether beak trimming at different ages or holding time in crates would affect fearfulness, as indicated by tonic immobility (TI) tests. Beak-trimming treatments included intact-beak controls and b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::351f7701dc89512c7e61b8c6b59ccce5
https://doi.org/10.3382/ps.0710391
https://doi.org/10.3382/ps.0710391
Publikováno v:
Poultry Science. 70:1057-1068
Pallets of stocks derived from the North Central Randombred White Leghorn population without selection (C) or selected (S) on family performance when kept with beaks intact in multiple-hen cages were compared. Pullets had intact, one-fourth, or one-h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::01e0559b91a5e7d81646e561efd98c18
https://doi.org/10.3382/ps.0701057
https://doi.org/10.3382/ps.0701057