Retardation of Sexual Development in Pinealectomized Single Comb White Leghorn Cockerels
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چکیده
منابع مشابه
Modeling ovarian follicle growth in commercial and heritage Single Comb White Leghorn hens.
Approximately 84% of the energy in chicken eggs resides in the yolk. A robust model of ovarian follicle development is therefore valuable for estimating energy requirements of laying hens. The current experiment was designed to model the growth of ovarian follicles in 32-wk-old modern commercial line (CL) and unselected heritage line (HL) Single Comb White Leghorn hens. The volume of yolk depos...
متن کاملXylazine, diazepam and midazolam premedicated ketamine anaesthesia in white Leghorn cockerels for typhlectomy.
Thee different combinations of ketamine hydrochloride were used to induce general anaesthesia for surgical operations (typhlectomy) in 30 adult, single-comb White Leghorn cockerels. They were randomly divided into three groups, each comprising 10 birds. Birds in Group I received xylazine-ketamine combinations at the dose rate of 2 mg xylazine and 10 mg ketamine per kg i.v., whereas birds of Gro...
متن کاملThe Rate of Thyroxine Secretion by the Thyroid Glands of White Leghorn Cockerels *
The physiology of the thyroid gland has become of increasing interest to us because of the observations made by Graham3 and the confirmation by others that the feeding of dried thyroid gland or the injection of thyroxine would dramatically increase the milk yield and fat secretion of many dairy cows. The effect of thyroxine upon the rate of growth and body type and conformation has been suggest...
متن کاملThe effects of different beak trimming techniques on plasma corticosterone and performance criteria in Single Comb White Leghorn hens.
DeKalb XL chicks were given a beak trim at 6 d of age (6DP) with a 2.8-mm gauge and a beak trim at 11 wk (11WB) with a block cut approximately 2 mm anterior to the nasal openings. Corticosterone (CS) levels of the 6DP treatment were (P < or = 0.01) elevated above nontrimmed CS levels at 2 h posttrim; and BW and feed consumption (FC) of the 6DP were depressed until 8 wk of age. At 11 wk of age, ...
متن کاملTemporal embryonic transcription of chicken fast skeletal myosin heavy chain isoforms in the single comb white leghorn
There are numerous factors that can significantly influence embryonic development in poultry and thus make simple days of incubation (chronological age) a less than perfect metric for studying embryonic physiology. The developmental fast skeletal muscle myosin (MyHC), the predominant protein in the Pectoralis major (PM), is temporally expressed as a cadre of highly specific developmental isofor...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1977
ISSN: 0032-5791
DOI: 10.3382/ps.0560876