On the Intensity of Exploitation of Berried Females of Macrobrachium rosenbergii (de Man) in the Vembanad Lake
On the Intensity of Exploitation of Berried Females of Macrobrachium rosenbergii (de Man) in the Vembanad Lake
Date
1997
Authors
M, Harikrishnan
Kurup, B. Madhusoodana
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Fisheries Technologists (India)Cochin
Abstract
The annual exploited stock of Macrobrachium rosenbergii during 1994-95 from
Vembanad lake is computed at 112.35 tons of which 66.22 tons was constituted by
the female population. Contribution of berried and spent females were in the order
of 23.43 tons and 5.02 tons respectively. Highest exploitation of berried (13.24 tons)
and spent (3.39 tons) females were noticed in October while zone 11 accounted for
maximum landings of berried prawns (3.6 tons). More than 50% of the berried
females were found to be exploited from upstream part of the lake during September
and October. In zone 4, 49.59% of the total spawner was comprised of spent females
in the month of October. Among the various type of fishing gears and methods,
"Pongu Veechal" accounted for exploitation of 75 and 79% of berried and spent
females respectively. Temporal and spatial variations in the intensity of exploitation
of ovigerous females and spent females are given. Intensity of recruitment over
fishing being exercised on the stock of M. rosenbergii of Vembanad lake is brought
out and the methods by which conservation measures can easily be imposed for
replenishment of stock is also highlighted.
Description
Keywords
Harried females, exploitation Macrobrachium rosenbergii, Vembanad lake, Kerala.
Citation
Fishery Tech 34(1):13-20