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Journal of Fisheries and Aquatic Science
Year: 2015  |  Volume: 10  |  Issue: 4  |  Page No.: 294 - 299

Reproductive Biology of Great Snakehead Channa marulius from Sylhet Basin in the North East Bangladesh

Arafat Siddiquee, Harunur Rashid, Md. Ariful Islam, Khan Kamal Uddin Ahmed and Md. Shahjahan    

Abstract: The reproductive biology of an endangered fish species great snakehead (Channa marulius) was studied by gonadosomatic index (GSI) and histological analysis of ovaries and testis. Fishes were collected from the haor areas of greater Sylhet basin for a period of July 2011 to June 2012. For female the highest GSI (0.42) was in July and the lowest (0.018) was in January and March. Similarly, for male the highest GSI (0.056) was in July and the lowest (0.018) was in January. In the histological study, the premature (PM) and mature (M) stages of oocytes were observed in the ovaries of fish collected in June to July. The ovaries contained developing oocytes oogonia (OG) and perinuclear oocytes (PNO) in the August and subsequent month samples which were mostly spent. In testis high proportions of mature germ cells spermatids (SPT) and spermatozoa (SPZ) were observed in the July samples of C. marulius. In parallel to GSI, both the ovary and testis develop and mature synchronously. The present findings indicated that Channa marulius from Sylhet basin attains peak reproductive maturity in the month of June and July which revealed the breeding season of this species.

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