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Reproductive biology of a tropical catfish, Mystics nemurus Cuvier & Valenciennes, in Chenderoh reservoir, Malaysia

1990; Wiley; Volume: 21; Issue: 2 Linguagem: Inglês

10.1111/j.1365-2109.1990.tb00454.x

1365-2109

Md Shaifur Rahman Khan, M. A. Ambak, K. J. Ang, Abu Khair Mohammad Mohsin,

Aquatic Ecosystems and Biodiversity

Aquaculture ResearchVolume 21, Issue 2 p. 173-180 Reproductive biology of a tropical catfish, Mystics nemurus Cuvier & Valenciennes, in Chenderoh reservoir, Malaysia M. S. KHAN, Corresponding Author M. S. KHAN Faculty of Fisheries and Marine Science, Agriculture University of Malaysia, UPM Serdang, Selangor Darul Ehsan, MalaysiaM.S. Khan, Faculty of Fisheries and Marine Science, 43400 Agriculture University of Malaysia, UPM Serdang, Selangor Darul Ehsan, Malaysia.Search for more papers by this authorM. A. AMBAK, M. A. AMBAK Faculty of Fisheries and Marine Science, Agriculture University of Malaysia, UPM Serdang, Selangor Darul Ehsan, MalaysiaSearch for more papers by this authorK. J. ANG, K. J. ANG Faculty of Fisheries and Marine Science, Agriculture University of Malaysia, UPM Serdang, Selangor Darul Ehsan, MalaysiaSearch for more papers by this authorA. K. M. MOHSIN, A. K. M. MOHSIN Faculty of Fisheries and Marine Science, Agriculture University of Malaysia, UPM Serdang, Selangor Darul Ehsan, MalaysiaSearch for more papers by this author M. S. KHAN, Corresponding Author M. S. KHAN Faculty of Fisheries and Marine Science, Agriculture University of Malaysia, UPM Serdang, Selangor Darul Ehsan, MalaysiaM.S. Khan, Faculty of Fisheries and Marine Science, 43400 Agriculture University of Malaysia, UPM Serdang, Selangor Darul Ehsan, Malaysia.Search for more papers by this authorM. A. AMBAK, M. A. AMBAK Faculty of Fisheries and Marine Science, Agriculture University of Malaysia, UPM Serdang, Selangor Darul Ehsan, MalaysiaSearch for more papers by this authorK. J. ANG, K. J. ANG Faculty of Fisheries and Marine Science, Agriculture University of Malaysia, UPM Serdang, Selangor Darul Ehsan, MalaysiaSearch for more papers by this authorA. K. M. MOHSIN, A. K. M. MOHSIN Faculty of Fisheries and Marine Science, Agriculture University of Malaysia, UPM Serdang, Selangor Darul Ehsan, MalaysiaSearch for more papers by this author First published: April 1990 https://doi.org/10.1111/j.1365-2109.1990.tb00454.xCitations: 6AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract Abstract. The reproductive biology of a popular and abundant freshwater catfish, Mystus nemurus Cuvier & Valenciennes, was examined, including sex ratio, gonadosomatic index, ova diameter and fecundity. The numerical ratio of male to female was 1:1.06 and was not significantly different (P > 0.05). Mean female gonadosomatic indices (GSI) in April and September corresponding to north-east and south-west monsoons were significantly different (P < 0.05) from the dry season (May, June, July and August). Thus the apparent GSI maxima in April and September were indicative of peak spawning period. However, there were no significant differences (P > 0.05) in the fluctuation of the measure of GSI except for those in the dry months, which probably suggested the existence of a protracted breeding season. Mean male GSI in February and November were similarly significant (P < 0.05) to the dry season, although not statistically different (P > 0.05) from those of January, March, April, July, August, October and November. This was probably attributable to an extended breeding period with spawning peaks in February and November corresponding to early and late monsoons. The aseasonal reproduction is common in tropical fishes. GSI were positively correlated with rainfall and water level fluctuations. Fecundity varied from a minimum 6900 to a maximum 93510 in specimens with total lengths of 34.8cm and 45.0cm respectively. Fecundity was found to increase linearly with length and weight and was significantly different (P < 0.05) from them. References Ang K.J. (1971) The reproductive biology of Malaysian Anabantidae with special reference to Betta pugnax Cantor. MSc Thesis, University of Malaya. Aizam Z. A. (1986) The reproductive biology of a tropical cyprinid, Hampala macrolepidota (Van Hasselt) from Zoo Negara. Kuala Lumpur, Malaysia. Journal of Fish Biology 29, 381- 391. Bagenal T.B. & Braum E. (1978) Eggs and early life history. In: Methods for Assessment of Fish Production in Freshwaters (ed. by T. Bagenal), pp. 165- 201. Blackwell Scientific Publications, Oxford . Bhatt V.S. (1971a) Studies on the biology of some freshwater fishes, Part V. 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