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Gonadal Developmental Stages of Mystus gulio in Twante channel at Yangon Region

http://hdl.handle.net/20.500.12678/0000006973
879e9e02-3aa4-4faa-8f10-3e3886c117e1
dbaa8b86-e432-49bc-b846-f4b3db0edac2
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Gonadal Gonadal Developmental Stages of Mystus gulio in Twante channel at Yangon Region.pdf (789 KB)
Publication type
Journal article
Upload type
Publication
Title
Title Gonadal Developmental Stages of Mystus gulio in Twante channel at Yangon Region
Language en
Publication date 2020-12-22
Authors
Myint Myint Win
Thinzar Aung
Kyu Kyu Win
Description
The present work was carried out gonadosomatic index (GSI), hepatosomatic index (HSI), condition factor (K) and the macroscopic and microscopic structure of gonad to predict the breeding season of the studied fish, Mystus gulio. The sample was monthly collected from the Twante canal, Yangon Division during the period of June 2017 to December 2018.According to the present finding, the highest GSI valueof bothfemale and male of M gulio,(22.93 ± 7.49, 2.57 ± 3.56,) was observedin Juneandthe value of HSI was highest (3.31 ± 2.31, 1.77 ± 0.74) in August. From the histological study, allstages of oocytes wereobserved in June. Process of spermatogenesis was distinguished into four categories; spermatogonia, spermatocyte, spermatid,and spermatozoa while the process of oocyte development was identified into eight stages; Chromatin nucleolus stage, Prenucleolus stage, Primary yolk stage, Secondary yolk stage, Tertiary yolk stage, Germinalvesicle migration stage, Germinalvesicle breakdown stage and Spent stage. The spawning stage for maleswas found in June, July,and for femaleswas May, June,and July.The size of the oocytes was ranged from 59.67 to 652μm.The highest cell percentages of germinalvesicles migration and germinalvesicles breakdown were observed in both months, June and May.
Keywords
Myistus gulio, gonadosomatic index, hepatosomatic index, condition factor, macroscopic and macroscopic structure
Journal articles
4
University of Mandalay, Research Journal
112 - 123
11
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0
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