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National Agricultural Research Centre (NARC), Islamabad  established in 1984, is the largest research centre of the Pakistan Agricultural Research Council (PARC). NARC, with a total land area of approximately 1400 acres, is located near Rawal Lake, six kilometers south-east of Islamabad. Physical facilities in term of experimental fields, laboratories, green houses, gene bank, library/ documentation, auditorium, machinery & lab equipment repair workshops, stores, hostels, cafeteria, audio visual studios, are also available at NARC.

Journal Article

Journal Article

Effects of seasonal variation in different reproductive phases on the cellular response of bursa and testes in Japanese quail (Coturnix japonica)  [2012]

Akbar, Z. (University of Agriculture, Faisalabad (Pakistan). Dept. of Anatomy); Qureshi, A.S. (University of Agriculture, Faisalabad (Pakistan). Dept. of Anatomy); Sajjad-ur-Rahman (University of Agriculture, Faisalabad (Pakistan). Inst. of Microbiology);

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In this study effects of seasonal variation on the cellular response of bursa and testes in Japanese quails (Coturnix japonica) have been studied. Thirty mature male Japanese quails, 10 birds in each reproductive phase, namely reproductive active phase regressive phase non-active phase were sacrificed. Total leukocyte and lymphocyte count were performed and serum testosterone levels were measured. The macroscopic and microscopic dimensions of testes and bursa of Fabricius were measured. Automated computer software Image J was used for histometric analysis. The results revealed that morphometrical parameters such as the length, circumference, thickness, and width of the testis showed a variable pattern in different seasonal phases e.g. in the active phase they were significantly (P less than 0.01) larger and decreased at regular pattern in the regressive and the non active phase. In contrast the immune parameters were significantly (P less than 0.01) at higher levels during the non active phase and the regressive phase and decreased at regular pattern in the active phase. The serum testosterone levels were also high during the active phase and decreased at regular pattern in the regressive and the non active phase. The histometric analysis revealed similar results such as diameters of seminiferous tubules showing a significant (P less than 0.01) rise during the active phase as compared with the regressive and the non active phase, and a significant declined
was record during the regressive and the non active phase. In conclusion, the increased reproductive activity in Japanese quails coincided with enhanced steroid hormone production during summer which suppressed the immune response. Moreover, during the winter decreased gonadal activity resulted in elevated immune function that helped to combat the harsh environment.
From the journal
Pakistan Veterinary Journal (Pakistan)
ISSN : 0253-8318

Bibliographic information

Type:
Journal Article
In AGRIS since:
2013
Volume:
32
Issue:
4
Start Page:
525
End Page:
529
All titles:
"Effects of seasonal variation in different reproductive phases on the cellular response of bursa and testes in Japanese quail (Coturnix japonica)"@eng
Other:
"3 ills., 2 tables, 25 ref., Summary (En), E-mail: anas-sarwar@hotmail.com"
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Bibliographic information

Type:
Journal Article
In AGRIS since:
2013
Volume:
32
Issue:
4
Start Page:
525
End Page:
529
All titles:
"Effects of seasonal variation in different reproductive phases on the cellular response of bursa and testes in Japanese quail (Coturnix japonica)"@eng
Other:
"3 ills., 2 tables, 25 ref., Summary (En), E-mail: anas-sarwar@hotmail.com"