Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2003.61.64RoyN.C. M.A. Wahab H. Khatoon S.H. Thilsted 1200361Preliminary investigation was carried into the economics of polyculture of Indian
major carps with small indigenous fish species (SIS) mola and chela. The culture
strategies consist of stocking the ponds with only carps (T1),
carps with mola (T2) and carps with chela (T3). The economic
feasibility of three different combinations was analyzed on the basis of the expenditure
incurred and total return from sale price of fish in the local market. The net
benefits per hectare per 7 months for only carps, carps plus mola and carps plus
chela polyculture systems were Tk. 94,925, 88,330 and 68,270 respectively which
largely reflected the gross fish production levels of 2,560, 2,412 and 2,176 kg
ha-1. However, only carp polyculture system provided higher benefit
(Tk. 94,925 ha-1), followed by carps-mola polyculture (Tk. 88,330 ha-1)
with non-significant difference but the net benefit in carp-chela polyculture
was significantly (P<0.05) lower than others. Benefit-cost ratio was obtained
higher in only carp polyculture, followed by carp-mola and carp-chela polyculture
systems. Farmers are no need to stock mola for next year in carp-mola polyculture
system, in that case total benefit would be higher then other systems. So, carp-mola
polyculture may be better as it has ensured higher production of nutritionally
rich mola and also economic point of view and this system is encouraging for rural
people because they would get mola regularly for consumption and carps as cash
crop.]]>Ahmed, K.,19814512Dewan, S., M.A. Wahab, M.C.M. Beveridge, M.H. Rahman and B.K. Sarker,199122277294Halver, J.E.,1984pp: 146pp: 146Kohinoor, A.H.M., M.L. Islam, M.A. Wahab and S.H. Thilsted,1998Amblypharyngodon mola Ham.) on the growth and production of carps in polyculture.]]>2119126Roos, N., M.M. Islam, S.H. Thilsted, M. Ashrafuddin, M. Mursheduzzaman, D.M. Mohsin and A.B.M. Shamsuddin,1999Amblypharyngodon mola) in polyculture with carps-experience from a field trial in Bangladesh.]]>221619Shang, Y.C.,1981Thilsted, S.H., N. Roos and N. Hassain,1997208284Zafri, A. and K. Ahmed,1981A. mola) and dhela (Rohtee cotio).]]>104753Roos, N.,20012001