The occurrence of the pusrulus stagi of the spiny lobster, Panulinis polyphagus

(Herbst) is reported for the first time from the Madras coast along with

brief notes on the material

Devarajan, K

Girijavallabhan, K G

CMFRI Digital Repository

ON THE OCCURRENCE OF PUERULUS OF SPINY LOBSTER PANULIRUS POLYPHAGUS (HERBST) ALONG THE MADRAS COAST K. G. GiRIJAVALLABHAN AND K. DEVARAJAN Madras Research Centre of C. M, F. R. Institute, Madras-8 ABSTRACT The occurrence of the pusrulus stagi of the spiny lobster, Panulinis poly-phagus (Herbst) is reported for the first time from the Madras coast along with brief notes on the material. Although no regular lobster fishery has been observed from the Madras coast, stray occurrence of PanuUrus polyphagus and P. homarus has been ce-corded from the rocky stretches of Royapuram shore. While observing the trawler catches landed at Royapuram centre, single specimen of the puerulus stage of the spiny lobster, PanuUrus polyphagus (Herbst) was collected on 23-4-1972. As there is no earlier information on the devlopmental stages of this species from the Madras coast, the present record is of considerable interest. The specimen measured 23.2 mm in total length 9.0 mm and 6.5 mm respectively in carapace length and breadth. The antennule was 11.0 mm long and the antenna, 91.0 mm. The carapace is flat, rectangular and provided with a pair of supraorbital as well as anterolateral spines. Two pairs of small spines are situated behind the supraorbital spines and one spine is found in front of the lateral keel on either side. Spinules are absent on the posterior margin of the carapace. Abdo-men is narrow and each abdominal segment has backwardly directed lateral spine. The antennal fiagellum is with alternate brownish red bands and the tip of the abdominal tergites are pinkish. The specimen on hand is found to agree with the diagnostic features given for the puerulus of P. polyphagus by Dash-mukh (1966). The occurrence of puerulus stage of P. polyphagus has been recorded from Bombay in October-Frebruary (Deshmukh 1966), from Goa in April-May (Thomas 1977), from Cochin in October-May (Rao and Kathirvel 1971) and from Kakinada in December-January (Dutt and Ravindranath 1975). The 254 NOTES present record from Madras is in April. Since all the records are encountered bet-ween October and May, it is probable that the puerulus settles down in suitable grounds during this period. The authors are thankful to Dr. E. G. Silas, Director, for his kind en-couragement, to Dr. P. Vedavyasa Rao for confirming the identification and to Shri T. Tholasilingam for the facilities offered. DESHMUKH, S. 1966. Cnistaceana, 10(2): 137-150. DUTT, S. AND K. RAVINDRANATH. 1975. Proc. Indian. Acad. Sci., 82 B No. 3: 100-107. RAO, P . VEDAVYASA AND M . KATHIRVEL. 1971. Indian J. Fish., 18; 129-134. THOMAS, P. A. 1977. Indian ]. Fisli., 22: 299-300. 

On the occurrence of puerulus of

Spiny lobster Panulirus polyphagus (Herbst)

Along the Madras coast

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On the occurrence of puerulus of Spiny lobster Panulirus polyphagus (Herbst) Along the Madras coast

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