Seasonal variations in the abundance of penaeid prawn seed in relation to environmental parameters in the seed grounds of Cochin backwaters

Easo, Sosamma and Mathew, K J (1989) Seasonal variations in the abundance of penaeid prawn seed in relation to environmental parameters in the seed grounds of Cochin backwaters. Indian Journal of Fisheries, 36 (2). pp. 125-132.

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Abstract

Early juveniles of Penaeus indicus, Metapenaues dobsoni and M. monoceros were collected from two centres in the shallow water areas in the Cochin backwaters where commercial seed collectors used to make their, prawn seed collections. A Quantitative Seed Sampler was used during premonsoon, monsoon and postmonsoon period of 1988. The study enabled to understand the relative abundance and seasonal variations of commercially important prawn seed of the above species. Of the total seed collected P. indicus formed 26%, M. dobsoni 59% and M. monoceros 15%. The seed exhibited considerable fluctuation in abundance through various seasons. Seventy per cent of the total seed of P. Indicus were collected during premonsoon period. But in the case of M. dobsoni, the highest percei>tage of 62 was obtained during monsoon period. The seed of M. monoceros had the maximum of 55% during monsoon period. Seed of P. indicus occurred at a maximum rate of 28/m' during April-May, that of M. dobsoni 20/m' and M. monoceros 7/m'during June to August. The relationship of the seed to the environment is also discussed.

Item Type:Article
Uncontrolled Keywords:penaeid prawn; environmental parameters; Cochin backwaters
Subjects:Marine Environment > Marine Pollution
Crustacean Fisheries > Prawn and Prawn fisheries
Divisions:CMFRI-Cochin > Fishery Environment
ID Code:306
Deposited By:Dr. V Mohan
Deposited On:30 Mar 2010 10:30
Last Modified:30 Mar 2010 10:30

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