Investigation of fecundity and gonado somatic index (GSI) of Rastrelliger kanagurta were carried out from March 2011 to February 2012. Fecundity was determined at different length, weight and ovary ranges of different individual fishes. Study revealed that at 5% significant level significant average absolute fecundity was found to be 1,08,266 and relative fecundity ranged from 407 to 1499. The number of ova generally increased with increase in length and weight. However, variations in fecundity with respect to length and weight were also noticed. The gonado-somatic index (GSI) was calculated for each individual fish (592 numbers) and was averaged for each month. The average GSI values were plotted against each month to analysed monthly variations. GSI showed wide variations between sex and it was highest for both males and females during the month of April and September, showing occurrence of more ripe individuals. Analysis of regression showed that there were significant relationship between the fecundity with the fish length, body weight and ovary weight.
Fecundity, Gonado Somatic Index (GSI), Indian Mackerel, Rastrelliger
Arrafi M., Azmi Ambak M., Piah Rumeaida M., Muchlisin Z.A. (2016). Biology of Indian Mackerel, Rastrelliger kanagurta (Cuvier,1817) in the Western Waters of Aceh. Iranian Journal of Fisheries Sciences., 15(3) 2016.
Adams, P.B. (1980). Life history patterns in marine fishes and their consequences for fisheries management. Fish. Bull., 78: 1â€“12.
Antony Raja, B. T. and Bande, V. N. (1972). An instance of abnormally ripe ovaries in the Indian mackerel, Rastrelliger kanagurta (Cuvier). Indian J. Fish., 19 (1&2):176 â€“ 179.
Bal, D. V. and Rao, K. V. (1984). Marine fisheries, Tata McGraw-Hill, New Delhi, 470.
Begg, G.A, Hare J.A and Sheehan D.D. (1999). The role of life-history parameters as indicators of stock structure. Fish. Res., 43: 141â€“163.
Devanesan, D. W. and John, V. (1940). On the natural history of Rastrelliger kanagurta (Russel) with special reference to its spawning season and eggs. Curr. Sci., 9(10): 462-464.
Doiphode, P.V.,(1974). Observations on the Indian mackerel, Rastrelliger kanagurta (Cuvier) from purse-seine catches along Goa coast. Indian J. Fish., 21(1):85- 88.
Edwards, R. R. C. and Shaher, S., 1991. The biometrics of marine fishes from the Gulf of Aden. Fishbyte, 9(2):27â€“29
Ganga, U. (2010). Investigations on the biology of Indian mackerel Rastrelliger kanagurta (Cuvier) along the Central Kerala Coast with special reference to maturation, feeding and lipid dynamicsCentral Institute of Fisheries Technology, Kochi.
Gondhalli, S. (2010). Breeding seasonality of Indian mackerel, Rastrelliger kanagurta (cuvier, 1817) off Mangalore coast with a note on the awareness of responsible fishery among fisher folk of Dakshina kannad., M.F.Sc Thesis, submitted to Karnataka veterinary, animal and fisheries sciences university, Bidar. pp.96.
Hulkoti, S.H., Shivaprakash, S.M., Anjanayappa, H.N., Somashekara, S.R., Benakappa, S., Naik, A.S.K. and Kumar, J. (2013). Breeding biology of Indian mackerel, rastrelliger kanagurta (cuvier) from Mangalore Region. Environment and Ecology, 31(2A), 683â€“688.
Krishnakumar, P. K., Mohamed, K. S., Asokan, P. K., Sathianandan, T. V., Zacharia, P. U., Abdurahiman, K. P., Shettigar, V. and Durgekar, R. N. (2008). How environmental parameters influenced fluctuations in oil sardine and mackerel fishery during 1926-2005 along the south-west coast of India? Mar. Fish. Inf. Serv. T&E Ser., 198: 1-5.
Nikolskii, G.V. (1969). Theory of Fish Population Dynamics as the biological background for rational exploitation and management of fishery resources. Otlo koeltz Science Publishers, 323 p.
Pillai, N.G.K., Vivekanandan, E., Ganga U. and Ramachandran, C. (2009). Marine Fisheries Policy Brief - (Kerala), CMFRI Spl. Publn. No. 100, pp 24.
Prathibha, Rohit and Gupta, A.C. (2004). Fishery, biology and stock of the Indian mackerel Rastrelliger kanagurta off Mangalore-Malpe in Karnataka, India. J. Mar. Biol. Ass. India., 46(2): 185 â€“ 191.
Rao, V. R. (1967). Spawning behaviour and fecundity of the Indian mackerel Rastrelliger kanagurta (Cuvier) at Mangalore Indian J. Fish., 14: 171 - 186.
Sekharan, K.V. (1958). On the south Kanara coastal fishery for mackerel (Cuvier) together with notes on the biology of the fish. Indian J. Fish., V(1): 1- 31.
Sinha, R. K. (1995). Some aspects of biology of freshwater cat fish Clarias batrachus (Linn.1758) of the Bombay region M. Sc. (Zool.) Thesis, C.I.F.E. (Deemed University) Versova, Bombay1. pp 1-74.
Yohannan, T.M. and Abdurahiman, U.C. (1998). Maturation and spawning of Indian mackerel. Indian J. Fish., 45(4): 399-406.
Yohannan, T.M. and Sivadas, M. (2003). The Indian mackerel. In: M.Mohan Joseph and A.A. Jayaprakash (Eds.) Status of exploited marine fishery resources of India, Central Marine Fisheries Research Institute, Kochi, pp 60 â€“ 65.
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