|
|
Relationship between parathyroid, calcitonin hormones and productive hysiological and immunological performance of some local strains
|
|
Abstract: One hundred day-old female chicks from each of Silver Montazah, Mandarah and EI- Salam strains were used to evaluate both parathyroid and calcitonin hormones. At 2 weeks of age, ten blood samples/each strain were collected to determine both serum parathyroid and calcitonin hormones. Classification appeared high levels of both hormones in Silver Montazah birds, medium in Mandarah and lower in EIsalam ones. The heavier body weights and egg weights were correlated with the lower levels of both hormones.
Silver Montazah birds which are higher in both hormone levels recorded earlier age at sexual maturity, laid more eggs, gained more egg mass, lower shell-less eggs and gave good shell quality.
Mandarah strain showed the highest primary and secondary immuno response against SRBC’s followed by Silver Montazah, lowest in EI- Salam ones. The same trend was found in weights of bursa, spleen and thymus.
|
| Publication year |
2006
|
| Pages |
297-317
|
| Availability location |
معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
|
| Availability number |
|
| Organization Name |
|
| City |
الاسكندرية
|
| serial title |
Egyption Poultry Science
|
| Department |
Poultry Breeding Research Department
|
| Author(s) from ARC |
|
| Agris Categories |
Animal husbandryAnimal physiology and biochemistry
|
AGROVOC
TERMS |
Calcitonin.
Hormones.
Immunological factors.
Layer chickens.
Parathyroid gland.
Performance testing.
Sexual maturity.
|
| Publication Type |
Journal
|