Zobrazeno 1 - 10
of 71
pro vyhledávání: '"Grégoy Y. Bédécarrats"'
Publikováno v:
Frontiers in Physiology, Vol 14 (2023)
Recent studies showed that apart from photostimulation, metabolic triggers may independently activate sexual maturation and egg production in chickens. However, the origin, mode of action, and specific target(s) of this metabolic control remain unkno
Externí odkaz:
https://doaj.org/article/801b20c9e0d440ec88e8b321d2c69c77
Publikováno v:
Poultry Science, Vol 102, Iss 4, Pp 102542- (2023)
ABSTRACT: The management of body weight (BW) in broiler breeder pullets is critical to offset the negative correlation between their growth potential and reproductive success. Therefore, a precision feeding system was developed to allocate feed indiv
Externí odkaz:
https://doaj.org/article/c159453fb5484ff080f5c91ce438018d
Publikováno v:
Frontiers in Physiology, Vol 13 (2022)
Estradiol-17β (E2) has long been studied as the primary estrogen involved in sexual maturation of hens. Due to the oviparous nature of avian species, ovarian production of E2 has been indicated as the key steroid responsible for activating the forma
Externí odkaz:
https://doaj.org/article/6a67aedcd0ea437494f775650bc16806
Publikováno v:
Poultry Science, Vol 101, Iss 3, Pp 101672- (2022)
ABSTRACT: Decades of intensive genetic selection in commercial layers has resulted in earlier maturation, while sustaining high production rates to 100 wks of age (woa). To support eggshell formation while maintaining a healthy skeletal frame, substa
Externí odkaz:
https://doaj.org/article/1bfb412ab96f4d199c37bd2322bf7df9
Publikováno v:
Poultry Science, Vol 99, Iss 9, Pp 4454-4465 (2020)
Effects of rearing cage type and dietary limestone particle size (LPS) on growth, apparent retention (AR) of nutrients, and bone quality were investigated. The treatments were arranged in a 2 × 3 factorial with cage (conventional, CON and furnished,
Externí odkaz:
https://doaj.org/article/3f63130655f3416c897ac8afdbb29ed2
Publikováno v:
Frontiers in Endocrinology, Vol 12 (2022)
Since its discovery as a novel gonadotropin inhibitory peptide in 2000, the central and peripheral roles played by gonadotropin-inhibiting hormone (GnIH) have been significantly expanded. This is highlighted by the wide distribution of its receptor (
Externí odkaz:
https://doaj.org/article/94b7a740f4304960bba2f63593b3ccee
Autor:
Mikayla Baxter, Grégoy Y. Bédécarrats
Publikováno v:
The Journal of Poultry Science, Vol 56, Iss 2, Pp 148-158 (2019)
Higher light wavelengths have been shown to stimulate extra-retinal photoreceptors more efficiently than lower wavelengths to promote reproduction in poultry. We developed a light emitting diode (LED) bulb that emits 60% of its light in the red spect
Externí odkaz:
https://doaj.org/article/3e2b42e45b064267afe091d42212d0f1
Publikováno v:
Frontiers in Physiology, Vol 12 (2021)
Genetic selection for earlier sexual maturation and extended production cycles in laying hens has significantly improved reproductive efficiency. While limited emphasis has been placed on the underlying physiological changes, we hypothesize that modi
Externí odkaz:
https://doaj.org/article/f4410059ae7f41f9b27c4d3e194b5b42
Publikováno v:
Frontiers in Physiology, Vol 11 (2020)
While photoperiod has been generally accepted as the primary if not the exclusive cue to stimulate reproduction in photoperiodic breeders such as the laying hen, current knowledge suggests that metabolism, and/or body composition can also play an inf
Externí odkaz:
https://doaj.org/article/d3afc4ff09ef4299baadbd5aa54e4ac0
Autor:
Holly Pizzey, Grégoy Y. Bédécarrats
Publikováno v:
The Journal of Poultry Science, Vol 44, Iss 4, Pp 409-415 (2007)
The aim of the present study was to determine the effects of dietary supplementation of lutein on reproductive performances in mature chickens. At 40 weeks of age, 15 Barred Rock roosters (n=5 per treatment) and 108 hens (n=36 per treatment) were ran
Externí odkaz:
https://doaj.org/article/45bb1d6a28e941a58fc29c28dda885b0