Summary
It is observed that there are two peaks of increase in fat content. One is in the months of October-November when the catches comprise mostly 16 to 20 cm. size group, and another is in March-April when the group comprises of sizes 20cm. and above.
The major fatty condition is attributable to the feeding activity of all sizes of fish. The minor fatty condition during March-April is due to the intensive feeding of the adult group of fish.
Any fish caught in October-November (mostly 16·1 to 20·0cm. and the samll proportion of 20·1cm. and above size) is quite fatty and this fat condition must be taken into consideration in its proper utilisation for salting, freezing, canning, fishmeal preparation, etc. The fish that are fatty during March-May are above 20·1 cm. and are almost mature. The fish are fatty before spawning and lean after spawning.
The fat in immature ones (160·cm. and less) never rises above 3% in flesh whereas in the mature ones it is as high as 8·5%. The corresponding figures for the whole fish are 2·32% and 12·5%.
The variations in fat content of individuals according to sexes and gonads, and at different times of the year are also indicated.
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Communicated by Dr. N. K. Panikkar,f.a.sc.
Published with the kind permission of the Director of Fisheries, Madras.
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Chidambaram, K., Krishnamurthy, C.G., Venkataraman, R. et al. Studies on mackerel: Fat variations—and certain biological aspects. Proc. Indian Acad. Sci. 35, 43–68 (1952). https://doi.org/10.1007/BF03050011
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DOI: https://doi.org/10.1007/BF03050011