GONADAL DEVELOPMENT OF CHANNA STRIATA (BLOCH, 1793) FROM HMAWBI TOWNSHIP, YANGON ENVIRONS
Abstract
- Knowledge on reproductive biology of fish species is crucial important for the biodiversity conservation and for the sustainable development of the fishery. The biological information about Channa striata has been poorly documented in Myanmar. The present work has been conducted to investigate the gonadal development and fecundity of C. striata from their natural environment. Fish were sampled from rice fields of Hmawbi Township in Yangon Region. Gonadal development has been studied by macroscopic and microscopic observation of the different stages of gonad during the study period from November 2017 to October 2019. In the present study, macroscopic characteristics of the female gonads showed four maturation stages and histological observation indicated seven phases of oocyte development. Spawning period has been determined by observing the monthly Gonado-Somatic-Index and Condition factor of the females. Highest GSI value of female C. striata was found in June and length at first sexual maturity was estimated at 26.04 cm. The mean absolute fecundity was 33922.08 ± 9708.42 vitellogenic oocytes. The results from the present study clearly showed that the breeding season of C. striata was extended from May to July in Myanmar and their peak spawning season was in June.
Collections
Download
Year
- 2021
Author
-
Khine Min Tun
Subject
- Zool
Publisher
- Myanmar Academy of Arts and Science (MAAS)