Experiments on shrimp polyculture in fixed cages in Vellar estuary


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Authors

  • A Shanmugam Centre of Advanced Study in Marine Biology, Parangipettai - 608 502, India
  • Carmel Gerald Centre of Advanced Study in Marine Biology, Parangipettai - 608 502, India
  • T Kannupandi Centre of Advanced Study in Marine Biology, Parangipettai - 608 502, India

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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Author Biographies

  • A Shanmugam, Centre of Advanced Study in Marine Biology, Parangipettai - 608 502, India
    Centre of Advanced Study in Marine Biology, Parangipettai - 608 502, India
  • Carmel Gerald, Centre of Advanced Study in Marine Biology, Parangipettai - 608 502, India
    Centre of Advanced Study in Marine Biology, Parangipettai - 608 502, India
  • T Kannupandi, Centre of Advanced Study in Marine Biology, Parangipettai - 608 502, India
    Centre of Advanced Study in Marine Biology, Parangipettai - 608 502, India

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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