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Seasonal change of thyroid histomorphological structure and hormone production in yellowfin seabream (Acanthopagrus latus) in the Persian Gulf
N. Salamat * , M. Havasi , N. Earfani Majd , A. Savari
, salamatnegin@yahoo.com
Abstract:   (7855 Views)
 

Seasonal changes of the thyroid gland structure and hormones secretion was examined in yellowfin seabream (Acanthopagrus latus) in the northwest of Persian Gulf (Musa creek). Thyroid gland composed of follicles scattered around the ventral aorta, near the gills. Follicular cells varied according to secretion of the gland during warm and cold seasons. Thyroid hormones (Triidothyronine [T3] and Thyroxine [T4]) were detected in the fish serum in levels ranged from 4.09-1.30 ng/mL for T3 and from 1.10-0.21 ng/mL for (T4) in the warm and cold seasons, respectively. The results showed that the height of thyroid epithelium and plasma concentration of thyroid hormones (thyroid activity) in A. latus increased significantly during spring and summer. The peak of these factors occurred in midsummer (August). Then, the thyroid activity decreased significantly during autumn and early winter from October to December according to decrease of temperature. T3 and T4 increased significantly from January to April.

 
Keywords: Yellowfin seabream, Acanthopagrus latus, Thyroid gland, Triidothyronine, Thyroxine, Histology, Plasma
Full-Text [PDF 348 kb]   (4285 Downloads)    
Type of Study: Orginal research papers | Subject: Ecology
Received: 2012/11/15
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Salamat N, Havasi M, Earfani Majd N, Savari A. Seasonal change of thyroid histomorphological structure and hormone production in yellowfin seabream (Acanthopagrus latus) in the Persian Gulf. IJFS. 2012; 11 (4) :840-848
URL: http://jifro.ir/article-1-742-en.html


Volume 11, Issue 4 (10-2012) Back to browse issues page
مجله علوم شیلاتی ایران Iranian Journal of Fisheries Sciences
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