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IJFS 2020, 19 Back to browse issues page
Ontogenetic development of the digestive system in Alburnus chalcoides larvae and juveniles
M. Zakeri Nasab, Sh. Jamili *, A.R. Valipour, S.M.R. Fatemi, E. Ramezani Fard
Iranian Fisheries Sciences ResearchInstitute, Agricultural Research,Education and Extension Organization, Tehran, Iran , shahlajamili45@yahoo.com
Abstract:   (234 Views)
The growth of the gastrointestinal tract of the larvae and juvenile of Alburnus chalcoides was studied after histological analysis using light microscopy, haematoxylin-eosin staining and the mouth development was scanned via electron microscopy. This study focuses on the morphology and histology of the mouth growth and digestive tract of A. chalcoides larvae to test the best weaning time for providing practical diet for fry based on the grade of their morphological aspects. It was observed that on the fifth day after hatching, the larvae mouth was opened. On the eighth day, the yolk sac was absorbed by two-thirds. On the same day, food is fed manually. Yolk sac was completely absorbed in 10th day. The histological base of the esophagus was formed by day 3. At day 3, the formation of enterocytes started. Also, the larvae hepatopancreas was formed on 5th day. According to the results, it was observed that after 8 days onwards, larvae of these fish can have a proper diet. At this day, the size of the mouth was 84 µm. when the lips were formed within 20 days and for the mouth angles 45ºand 90º, the food size for mouth, was 168 and 307 μm, respectively.
Keywords: Alburnus chalcoides, Ontogenetic, Digestive system, Larvae, Juvenile
Full-Text [PDF 1643 kb]   (137 Downloads)    
Type of Study: Orginal research papers | Subject: Biology & physiology
Received: 2017/07/12 | Accepted: 2017/11/13 | Published: 2020/07/20
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Zakeri Nasab M, Jamili S, Valipour A, Fatemi S, Ramezani Fard E. Ontogenetic development of the digestive system in Alburnus chalcoides larvae and juveniles. IJFS. 2020; 19 (4) :2159-2172
URL: http://jifro.ir/article-1-2820-en.html


Volume 19, Issue 4 (2020) Back to browse issues page
مجله علوم شیلاتی ایران Iranian Journal of Fisheries Sciences
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