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Demersal Fisheries of Vizhinjam

Nita Radhakrishnan

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Abstract

The average annual yield from the demersal fisheries of Vizhinjam amounts \nto 773 tomtes which forms about 29% of the total marine fish production of the \nplace. The seasonality and the size composition of the fishery for silver bellies, \nbalistids, pomfrets, prawns, cat fishes, scienids, elasmobranchs and perches are \ngiven. An analysis of the catch per unit of effort by the different gears shows \nthat the general decline from 1965 to 1967 is probably due to reduction in the \navailability.

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The average annual yield from the demersal fisheries of Vizhinjam amounts \nto 773 tomtes which forms about 29% of the total marine fish production of the \nplace. The seasonality and the size composition of the fishery for silver bellies, \nbalistids, pomfrets, prawns, cat fishes, scienids, elasmobranchs and perches are \ngiven. An analysis of the catch per unit of effort by the different gears shows \nthat the general decline from 1965 to 1967 is probably due to reduction in the \navailability.

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Available abstract

The average annual yield from the demersal fisheries of Vizhinjam amounts \nto 773 tomtes which forms about 29% of the total marine fish production of the \nplace. The seasonality and the size composition of the fishery for silver bellies, \nbalistids, pomfrets, prawns, cat fishes, scienids, elasmobranchs and perches are \ngiven. An analysis of the catch per unit of effort by the different gears shows \nthat the general decline from 1965 to 1967 is probably due to reduction in the \navailability.

Key concepts: Demersal zone, Fishery, Yield (engineering), Seasonality, Catch per unit effort, Fish <Actinopterygii>, Biology, Ecology

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