This investigation aims to study the reproductive traits, including sex ratio, spawning season and pattern, batch fecundity (F), and length at first maturity (L_m), of the commercial catfish Mystus mysticetus living in the freshwater of the Mekong and Chao Phraya basins. A collection of 596 individuals was caught using trawl nets from Cai Rang, Can Tho (CT) and Long Phu, Soc Trang (ST) from October 2020 to September 2021. To conclude, it is recommended that the fish should be caught at length > L_m and avoid fishing in the main spawning period in order to exploit this fish resource sustainably.

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