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Effects of tilapia ( Oreochromis niloticus L.) stocking and artificial feeding on water quality and production in rohu–common carp bi‐culture ponds
Author(s) -
Rahman Mohammad Mustafizur,
Verdegem Marc,
Wahab Md Abdul
Publication year - 2008
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2008.02029.x
Subject(s) - stocking , oreochromis , polyculture , nile tilapia , tilapia , biology , common carp , cyprinus , carp , zoology , fishery , fish farming , labeo , water quality , aquaculture , ecology , fish <actinopterygii>
Previous research showed that stocking 1.5 rohu ( Labeo rohita ) and 0.5 common carp ( Cyprinus carpio ) m −2 yields the highest production in small holder ponds in Bangladesh. The present study looked into the effects of additional stocking of Nile tilapia ( Oreochromis nilotica ) in fed or non‐fed ponds on water quality and fish production. A low, additional stocking density of 0.2 Nile tilapia m −2 was tested. All treatments were executed in triplicate in 100 m 2 ponds and the duration of the experiment was 4.5 months. The results showed that tilapia addition increased nutrient concentrations and reduced total suspended solid concentration and phytoplankton biomass ( P <0.05). Tilapia stocking resulted in additional production without affecting the growth and production of rohu and common carp. Supplemental feeding increased the nitrogen and phosphorus concentrations, phytoplankton availability and the growth and production of rohu and common carp ( P <0.01). The combination of supplemental feeding and tilapia stocking resulted in a higher net yield than the other treatments ( P <0.05). Stocking 1.5 rohu, 0.5 common carp and 0.2 tilapia m −2 in fed‐ponds is a good culture combination for polyculture farmers in South Asia.