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:: دوره 19، شماره 1 - ( 1398 ) ::
جلد 19 شماره 1 صفحات 110-99 برگشت به فهرست نسخه ها
Ontogenic development of digestive accessory glands in larval and juvenile Vimba bream, Vimba vimba (Pallas, 1814)
چکیده:   (3301 مشاهده)
The current study investigated histological development and histochemistry of digestive accessory glands of Vimba bream Vimba vimba from hatching through 60th day after hatching (DAH). The samples were randomly taken from day 1 (hatching) until the full absorption of the yolk sac at day 7 and the day after that, then with 2, 5, and 10 days intervals until 60 DAH. The development of the digestive accessory glands was followed histologically using light microscopy after Haematoxylin-Eosin and Periodic-Acid Schiff (PAS) staining. A primordial liver was observed at 1 DAH in the ventral region of the yolk sac, pancreas at 2 DAH, gall bladder and bile duct were developed at 4-5 DAH. At the same time when larvae were growing, digestive accessory glands continued differentiation and, at 5 DAH, hepatocytes of liver with eosinophilic cytoplasm and basophilic granules showed regular shape around sinusoids. Coinciding with the liver development, sinusoids developed as well and hepatic cells increased in size. Also, at this stage, eosinophilic zymogen granules of exocrine portion of pancreas were observed. Secretory activity of digestive accessory glands began with the emergence of PAS positive cells followed by secretion of neutral mucopolysaccharides and glycogen compounds in liver cells of larvae at 4 DAH and pancreatic cells of larvae at 4-7 DAH. The results of this study can be effective in identifying growth limiting factors in breeding larvae, reducing casualties during exogenous feeding, and even developing a proper diet for its digestive system.
 
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نوع مطالعه: پژوهشي | موضوع مقاله: Biology & physiology
دریافت: 1396/6/6 | پذیرش: 1396/9/13 | انتشار: 1398/10/29
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Jalali S, Jamili S, Borani M, Ramezanifard E, Sepahdari A. Ontogenic development of digestive accessory glands in larval and juvenile Vimba bream, Vimba vimba (Pallas, 1814). IJFS 2020; 19 (1) :99-110
URL: http://jifro.ir/article-1-2904-fa.html

Ontogenic development of digestive accessory glands in larval and juvenile Vimba bream, Vimba vimba (Pallas, 1814). مجله علوم شیلاتی ایران. 1398; 19 (1) :99-110

URL: http://jifro.ir/article-1-2904-fa.html



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دوره 19، شماره 1 - ( 1398 ) برگشت به فهرست نسخه ها
Iranian Journal of Fisheries Sciences Iranian Journal of Fisheries Sciences
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