The authors collected a mackerel larva measureing 2.98 mm in total length in a surface plankton tow at 05.30 hours on 22.3.197

Girijavallabhan, K G

Gnanamuttu, J C

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I I t <\> ', I ' ( i ; < . ' I 1 ' 1 ' I J i , , I , , . , , i r ' ' . ( . ) ! Fifl^ f. ' ' i ' '1 ! !^> '• . •' ll. •; • ' M I , I ' - r I ' - ' - h i - i ' , , ; , I i i , . . i , ^ M a d r a s !'l • ' , ,- i. : ' i , , I ,1 I ' l . . ( ! . • , = ; i : . . f . , . . i ; i , f . 1 294 NOTES terior and posterior sides of the vent. From the 12th to the 24th myosepta the melanophores are placed one each along the ventro-median line and a single one in the larval caudal fin. No distinct pigments are seen on the head region at this stage. A few differences are noticeable in the morphometric measurements pf the present material from that given by Peter (1967). According to him, the head length of the larva measuring 2.7 mm in total length is 1.4 mm, whereas in our specimen of 2.98 mm (T.L.) the head length is 0.78 mm. Gnanamuttu and Girijavallabhan (MS) have observed February to May as the peak spawning season for R. kanagurta and R. faughni along the Madras coast. Incidentally, the occurrence of oozing males and females of mackerel during this period in the commercial catches is of added interest. We are thankful to Dr. E. G. Silas for confirming our identification of the larva. GNANAMUTTU, J .C . 1971. Indian J. Fish., 18:170-173. GNANAMUTTU, J. C. AND K . G . GIRIJAVALLABHAN. 1972. Proc. Symposium on the Pelagic fisheries resources of the seas around India (MS). MATSUI, T . 1963. Report on Results of Naga Expedition, Scripps Institution of Oceano-graphy. 59:69. PETER, K.J. 1967. Bull. Nat. Inst. Sci. India, Symposium on Indian Ocean, No. 38 (2): 771-777. 

On a mackerel larva (Rastrelliger sp.) from the inshore waters of Madras

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On a mackerel larva (Rastrelliger sp.) from the inshore waters of Madras

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