Zobrazeno 1 - 10
of 113
pro vyhledávání: '"G.S. Fraley"'
Publikováno v:
Poultry Science, Vol 103, Iss 7, Pp 103738- (2024)
ABSTRACT: Pekin ducks are exposed to stressors such as heat stress, enteric pathogens, mycotoxins, and other environmental stressors. We know from wild bird literature that birds communicate through vocalizations. We hypothesized that Pekin ducks wou
Externí odkaz:
https://doaj.org/article/26f2886f03274360854be61be4d92ed9
Publikováno v:
Poultry Science, Vol 103, Iss 5, Pp 103588- (2024)
ABSTRACT: Preening cups are a form of environmental enrichment that provides Pekin ducks a semi-open water source to express their natural behaviors. We recently observed that preening cups may increase feather pecking behaviors in ducks. Thus, we se
Externí odkaz:
https://doaj.org/article/17ad4ec4f06743038a37b04a0b7f4d00
Publikováno v:
Journal of Applied Poultry Research, Vol 33, Iss 1, Pp 100384- (2024)
SUMMARY: Light plays a vital role in the visual perception, development, and welfare of birds. Since the advent of LED lights, numerous studies have attempted to obtain the effects of lighting on developing embryos, with quite mixed results. Several
Externí odkaz:
https://doaj.org/article/69709a053d54470ca4dc455c538d368d
Autor:
X.Y. Zhou, X.C. Chen, G.S. Fraley, K.Y. Zhang, G. Tian, S.P. Bai, X.M. Ding, J.P. Wang, L. Lv, Y. Xuan, Q.F. Zeng
Publikováno v:
Poultry Science, Vol 103, Iss 2, Pp 103291- (2024)
ABSTRACT: Our study aimed to investigate the effects of different dietary vitamin D (VD) combinations during the grower (1–32 d of age) and feed restriction (33–52 d of age) phases on growth performance. We also evaluated sternal morphology, mine
Externí odkaz:
https://doaj.org/article/de57ffe9a2544532bdbf0bd7aa33ab51
Autor:
E.M. Oluwagbenga, G.S. Fraley
Publikováno v:
Poultry Science, Vol 102, Iss 12, Pp 103141- (2023)
ABSTRACT: The impact of global warming on poultry production has gained significant attention over the years. However, our current knowledge and understanding of the mechanisms through which heat stress (HS) resulting from global warming affects the
Externí odkaz:
https://doaj.org/article/1ea63ea8995e4af9bdea3760a935aa6f
Autor:
J.M. Schober, J. Merritt, M. Swanson, V. Tetel, E. Oluwagbenga, D. Frey, H. Parnin, M. Erasmus, G.S. Fraley
Publikováno v:
Poultry Science, Vol 102, Iss 12, Pp 103145- (2023)
ABSTRACT: Preening cups may be a form of open water that would allow ducks to express preening behaviors. We set out to test the hypothesis that preening cups would not have detrimental effects on ducks or their environment. Control pens (N = 6, 65 d
Externí odkaz:
https://doaj.org/article/eef41eabfcfc42699b645d59d4d03976
Autor:
P.D. Rivera, G.S. Fraley
Publikováno v:
Poultry Science, Vol 102, Iss 1, Pp 102272- (2023)
ABSTRACT: Cryptochromes are blue-, or ultraviolet-, light-absorbing proteins involved in the circadian clock, blue/ultraviolet light perception and potentially magnetoreception. At least 4 separate cryptochrome genes have been identified in avian spe
Externí odkaz:
https://doaj.org/article/6cbe8e9f02cb4825b90854c993a707bd
Publikováno v:
Poultry Science, Vol 101, Iss 7, Pp 101914- (2022)
ABSTRACT: Poultry scientists have utilized both direct and indirect measures of stress hormones for monitoring the state of avian welfare. For decades, it has been assumed that the mammalian and avian hypothalamic pituitary adrenal (HPA) function sim
Externí odkaz:
https://doaj.org/article/ccf10446e8d748a9a56bfa788811f07a
Publikováno v:
Poultry Science, Vol 101, Iss 1, Pp 101534- (2022)
ABSTRACT: Some concerns have been raised recently about the assay of corticosterone vs. cortisol in poultry species. Thus, we tested the hypothesis that ducks secrete both glucocorticoids. First, we validated two commercially ELISA kits for the two g
Externí odkaz:
https://doaj.org/article/0e7d4dfbac684e4e8c8b36b78aee07b6
Autor:
H.Y. Zhang, Q.F. Zeng, S.P. Bai, J.P. Wang, X.M. Ding, Y. Xuan, Z.W. Su, G.S. Fraley, B. Yao, K.Y. Zhang
Publikováno v:
Poultry Science, Vol 99, Iss 3, Pp 1241-1253 (2020)
Genetic selection and intensive nutrition for increased growth rate in meat-type ducks has resulted in an imbalance between pectorales increment and sternal mass, which is detrimental to productivity and welfare. Reducing body weight and increasing s
Externí odkaz:
https://doaj.org/article/60795d6d017640519c3867b4dffc7cdd