INVESTIGATION OF SOME BIOLOGICAL CONDITIONS OF JOHNIUS COITOR (HAMILTON, 1822) FROM GYAING RIVER SEGMENT BETWEEN GADOE AND KAWBEIN AREA
Abstract
- Amphidromous croaker Johnius coitor (Hamilton, 1822) is one of the commercially important demersal fish of the Gyaing River segment between Gadoe and Kawbein Area. The study is based on 200 samples of J.coitor (Hamilton, 1822) collected at a monthly interval for a period of 12 months (January 2022 to December 2022). The result showed that the total length of male J.coitor specimens ranged from 12.00 cm to 20.00 cm and weight from 15.00 g to 70.00 g, while the female specimen ranged from total length 14.00 cm to 20.00 cm in total length and 13.00 g to 81.00 g in total weight. The length-weight relationship values of male and female J. coitor were significantly correlated (R2 = 0.5036 and R2 = 0.551, respectively). The peak value of GSI was attained in February for males and for females in October. A gradual increase in GSI value was found during the spawning period and gradually decreased during the post-spawning and resting periods. GSI values occur in an inverse relationship to those of HSI. The condition factor (K) is (0.41-0.95) in males and (0.40-0.89) in females, which is close to (1) and could be considered an indicator of good growth and feeding conditions. The result of this study contributes information on species restoration and fishery management in the Gyaing River.
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Year
- 2025
Author
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Mi Khin Sandar Win1, Aye Aye Khaing (1)2, Nyunt Nyunt Oo3
Subject
- Zoology, Marine Science, Environment of Water Studies
Publisher
- Myanmar Academy of Arts and Science (MAAS)