العلاقة بين هرمونى الجار درقية و الكالسيتونين و الاداء الانتاجى و الفسيولوجى والمناعى لبعض سلالات الدجاج المحلى

العلاقة بين هرمونى الجار درقية و الكالسيتونين و الاداء الانتاجى و الفسيولوجى والمناعى لبعض سلالات الدجاج المحلى

[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.]