Fishery of Macrobrachium rosenbergii (de Man) in the Vembanad lake and confluent rivers


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Authors

  • M Harikrishnan School of Industrial Fisheries, Cochin University of Science arid Technology Cochin. 16.
  • B Madhusoodana Kurup School of Industrial Fisheries, Cochin University of Science arid Technology Cochin. 16.

Abstract

The exploited stock of Macrobrachium rosenbergii (de Man) from Vembanad lake
and confluent rivers was quantified as 121.14 tonnes annually and the average
annual yield was found to be 5.34Kg/ha. Peak landings were observed during
October while zone 9 contributed the highest landings. However, the most
productive zone based on annual yield/ha was zone 10 (18.64Kg/ha) whereas,
zone 1 appeared as the least productive zone (0. 197Kg/ha). Cast net operation
such as "Pongu Veechal" was found to be the principal method of fishing for M.
rosenbergii in the lake. Females distinctly predominated over the males.
Morphotype wise, Strong Blue Clawed females (SBC) among female population
(36.9 tonnes) and Weak Blue Clawed males (WBC) among males constituted the
highest landings (14.6 tonnes). Though males in the size range 71 -393mm TL
and females of 110-290mm TL could be encountered in the exploited stock,
190-209mm and 210-229mm were found to be the model classes in males and
females respectively. On examining the marketable yield structure, it could be
seen that 100-150g size group showed distinct dominance among both sexes.

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Author Biographies

  • M Harikrishnan, School of Industrial Fisheries, Cochin University of Science arid Technology Cochin. 16.
    School of Industrial Fisheries, Cochin University of Science arid Technology Cochin. 16.
  • B Madhusoodana Kurup, School of Industrial Fisheries, Cochin University of Science arid Technology Cochin. 16.
    School of Industrial Fisheries, Cochin University of Science arid Technology Cochin. 16.

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Issue

Vol. 48 No. 2 (2001)

Section

Articles

License

The copyright of the articles published in Indian Journal of Fisheries vests with the Indian Council of Agricultural Research, who has the right to enter into any agreement with any organization in India or abroad engaged in reprography, photocopying, storage and dissemination of information contained in these journals. The Council has no objection in using the material, provided the information is being utilized for academic purpose but not for commercial use. Due credit line should be given to the ICAR where information will be utilized.

How to Cite

Harikrishnan, M., & Kurup, B. M. (2011). Fishery of Macrobrachium rosenbergii (de Man) in the Vembanad lake and confluent rivers. Indian Journal of Fisheries, 48(2), 189-198. https://epubs.icar.org.in/index.php/IJF/article/view/8461