Experiments on shrimp polyculture in fixed cages in Vellar estuary
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Abstract
Investigations on shrimp (Penaeus indicus, P. monodon and P. semisulcatus)polyculture in a fixed cage (5 x 4 x Im) were conducted to assess the increase
in sustainable biomass production in an unit area in Vellar estuary using an
economically viable low cost technology. The shrimps were grown for 90 days
covering the premonsoon and monsoon seasons by feeding them at the rate
of 15 % of their body weight per day. The length-weight relationship of the
individual was calculated and the 'r' values were 0.98, 0.97 and 0.93 for P.
indicus, P. monodon and P. semisulcatus respectively. The average total length
increase/day of the different species was found to be 0.90 mm for P. indicus,
0.78 mm for P. monodon and 0.64 mm (in 2 months) for P. semisulcatus. The
environmental parameters were also monitored. The rainfall recorded was 500
mm in October and 320 mm in November. A total of 5 kg was harvested out
of which the actual stocked shrimps weighed 2.865 kg (P. indicus : 2.339 kg
and P. monodon : 0.526 kg) and the remaining 2.135 kg was contributed by
the autoentrants. After 60 days 100 % mortality of P. semisulcatus was
noticed, indicating their preference for higher salinities.
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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
Shanmugam, A., Gerald, C., & Kannupandi, T. (2011). Experiments on shrimp polyculture in fixed cages in Vellar estuary. Indian Journal of Fisheries, 45(4), 413-417. https://epubs.icar.org.in/index.php/IJF/article/view/8686