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E-ISSN: 2347-5129, P-ISSN: 2394-0506

International Journal of Fisheries and Aquatic Studies

2020, Vol. 8, Issue 6, Part B

Spawning frequency and sex reversal of Tenualosa Ilisha (Clupeid)-A Review


Author(s): BM Shahinur Rahman

Abstract: Tenualosa Ilisha (Clupeidae) is the most important single species and national fish of Bangladesh. It accounts for more than half of the total marine catches and about 12-13% of total fish production and about 1.0 percent of GDP. Absence of small females and large males and transitional gonads of the histological data proved Tenualosa toli and T. macrura (Clupeidae) changes their sexes at the end of the first year and spawn as females in the second year. T. toli Spawn in the middle reaches of estuaries and females deposit all their eggs at once while T. macrura spawn throughout the year in Sumatra but in Sarawak have a seasonal peak in the NE monsoon (December). The smaller sized T. ilisha are almost all males, a few small functionally female fish are present in Bangladesh water body. Male sex ratio of T. ilisha is less than female sex ratio (1:5.09).

DOI: 10.22271/fish.2020.v8.i6b.2371

Pages: 131-136  |  189 Views  31 Downloads

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How to cite this article:
BM Shahinur Rahman. Spawning frequency and sex reversal of Tenualosa Ilisha (Clupeid)-A Review. Int J Fish Aquat Stud 2020;8(6):131-136. DOI: https://doi.org/10.22271/fish.2020.v8.i6b.2371
International Journal of Fisheries and Aquatic Studies