The calanoid copepod family Pontellidae from the Indian Ocean

Silas, E G and Pillai, P P (1973) The calanoid copepod family Pontellidae from the Indian Ocean. Journal of the Marine Biological Association of India, 15 (2). pp. 771-858.

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Abstract

The problems of immediate concern regarding the fishery of Indian oil-sardine, Sardinella longiceps, areas follows: Researches should be keyed up on three main lines, namely, behaviour studies through analysis of the distribution patterns of the fish in relation to the environment, population studies to know the homogeneity of the exploited population as well as its strength and parameters and spawning studies for detection, delimitation and evaluation of the spawning areas. Development should include redeployment of eff'ort beyond the present fishing zone, introduction of purse seining on a large scale and the socio-economic problems of the fishing community. The fluctuations so characteristic of the oil-sardine catches are most probably because of oscillations in the annual recruitment of the juvenile broods which, in turn, appear to be linked up with variations in the intensity of the south-west monsoon. A weak or erratic monsoon is suspected to bring about conditions which are not conducive to successful reproduction and survival of the young fish. A hypothesis is proposed that while a certain minimum amount of rainfall during the spawning period appears a necessary condition, it certainly is not the only responsible factor for production of a good year class. A symposium on both the oil-sardine and the Indian mackerel is suggested to inincrease the effectiveness of future attempts of more penetrative studies, since many of the problems are common for both the fisheries which constitute the 'dual-species neritic pelagic fisheries system' of south-west coast of India.

Item Type:Article
Uncontrolled Keywords:Indian oil-sardine; Sardinella longiceps; south-west coast of India
Subjects:Copepods
Divisions:CMFRI-Cochin > Biodiversity
CMFRI-Cochin > Fishery Environment
ID Code:1578
Deposited By:Geetha P Mrs
Deposited On:26 Jul 2010 17:30
Last Modified:26 Jul 2010 17:30

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