On the seasonal distribution of some polychaetes in the Indian Ocean area along 110 degrees meridian

G. Peter


Sagitella kowalevskii, Typhloscolex mulleri and Lopadorhynchus henseni are the three dominant species among the seventeen species of pelagic polychaetes recorded in the samples collected from an area off West Australia during International Indian Ocean Expedition. A majority of the species reach their peak abundance during April-August when the subtropical watermass occupies the central and southern parts of the region off West Australia. Many species are poorly represented in December-April, when the tropical watermass prevails in the northern parts. The species of tropical and sub tropical dominances are brought to light. The diurnal variation of T. leuckartii, Alciopina parasitica, L. henseni etc. are found to be more pronounced


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