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International Journal of Fisheries and Aquatic Studies
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E-ISSN: 2347-5129, P-ISSN: 2394-0506

International Journal of Fisheries and Aquatic Studies

2019, Vol. 7, Issue 1, Part D

Seasonal variation in the gonads and management issues of Gerres filamentosus, Sharavati estuary, central west coast of India


Author(s): Dr. Renukadevi Golikatte and Niranjan Hegde

Abstract: Sharavati estuary is one amongst the four main estuarine systems in Uttara Kannada district. Here Gerres forms a minor but important fishery of considerable significance. Hence, an attempt has been made to study seasonal variation in the annual cycle and management issues of Gerres filamentosus from Sharavati estuary. The seasonal fluctuation in the weight of the gonad in relation to weight of the fish was studied to indicate the spawning season of the fish (Gonado - Somatic Index GSI). The GSI of Gerres filamentosus ranged from 0.2 to 1.6 (1998) and 0.8 to 1.8 (1999) in males and 1.1 to 4.3 (1998) and 1.02 to 4.6 (1999) in females. July is considered as the peak spawning month due to sharp fall of GSI values in females from 4.3 in June to 1 in July during 1998 and 4.6 in June to 1.1 in July during 1999. The fecundity of fish is usually determined from the number of ova of the mature groups in the ovary. The fecundity of the Gerres filamentosus (size range 154mm to 240mm) was found to vary from 48,300 to 1, 16, 760 eggs, the average being 67,791 eggs per female. Demand for the fish is high during monsoon period due to suspension of sea fishing that seriously affects the continuation of the species. Hence, an attempt has been made to convince the fishermen not to exploit the mature fishes.

Pages: 255-257  |  336 Views  17 Downloads

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How to cite this article:
Dr. Renukadevi Golikatte, Niranjan Hegde. Seasonal variation in the gonads and management issues of Gerres filamentosus, Sharavati estuary, central west coast of India. Int J Fish Aquat Stud 2019;7(1):255-257.
International Journal of Fisheries and Aquatic Studies