Comparative evaluation of growth, survival and production of carp species at different stocking densities under polyculture
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Abstract
Experiments to evaluate the growth rates of different carp species, survival levelsand biomass production with respect to varied stocking densities ranging
between 2000 and 6000 numbers /ha were conducted in six ponds of 0.04 ha each
for a period of 11 months. Growth of all the species decreased with increase in
stocking densities, with mean size of harvest recorded being 1035 g, 725 g and
550 g in treatments with density of 2000, 4000 and 6000/ha respectively. In
general, exotic carp species showed higher growth rates than those of Indian
major carps in all the treatments. Even at the stocking level of 35%, the three
exotic carp species in combination contributed as much as 47.3 - 50.0% to the
harvested biomass in three treatments. The mean gross and net production levels
registered in treatment with density of 6000/ha were estimated as 2741 kg/
ha and 2706 kg/ha respectively during a culture period of 11 months. The corresponding
estimated production levels shown in treatments with density of 4000
and 2000/ha were 2367.5 kg/ha, 2342.5 kg/ha and 1815.0 kg/ha, 1802.5 kg/ha
respectively during the same period. The mean FCR values recorded in the three
treatments were in the range of 2.69-2.82.
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Jena, J. K., Ayyappan, S., Aravindakshan, P. K., & Muduli, H. K. (2011). Comparative evaluation of growth, survival and production of carp species at different stocking densities under polyculture. Indian Journal of Fisheries, 48(1), 17-25. https://epubs.icar.org.in/index.php/IJF/article/view/8472