Fingerponds are earthen ponds dug at the edge of natural wetlands
and stocked naturally with wild fish during flooding. They preserve
the wetland environment in which they are situated while
maintaining a productive culture system. In this study, the
importance of organic manure applications in enhancing nutrient
levels, phytoplankton and periphyton productivities and ultimately
fish production was examined in experimental Fingerponds set up
with the participation of local communities in Uganda. Results show
that organic manures enhance algal development and fish production
in Fingerponds, but close monitoring and control are needed. Fish
yields in Fingerponds can be enhanced to 1500 - 2800 kg/ha over a
functional period of 200 to 300 days using animal manure (e.g.
chicken), fermented green manure and artificial substrates for
periphyton development. Good management practices are required to
regulate pond inputs and conditions. High clay turbidity, nitrogen
limitation and high recruitment of fish can limit fish production.
Overall, Fingerponds were shown to be an effective addition to
protein production for poor riparian communities in East Africa and
are recommended for adoption.
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