Suitability of duckweed (Lemna minor) as feed for fish in polyculture system
Journal: International Journal of Agricultural Research, Innovation and Technology (IJARIT) (Vol.2, No. 1)Publication Date: 2012-06-30
Authors : M.Z.H. Talukdar M. Shahjahan; Rahman;
Page : 42-46
Keywords : Duckweed; polyculture; fish; feed; production; pond; water quality;
Abstract
In the present study, we conducted an experiment to evaluate the effects of duckweed (Lemna minor) as feed on fish production in polyculture. The experiment had 2 treatments where in treatment 1 (T1) ponds were supplied with duckweed as feed and in treatment 2 (T2) ponds were kept as control (without supply of duckweed). Average survival rates in T1 and T2 were 90 and 89%, respectively. The specific growth rates (SGR) were higher in T1. Calculated net production in T1 was 6.25 tons ha.-1 yr.-1 and in T2 was 2.84 tons ha.-1 yr.-1. The ranges of physico-chemical parameters analyzed were within the productive limit and more or less similar in all the ponds under both treatments during the experimental period. There were 24 genera of phytoplankton under 5 major groups and 10 genera of zooplankton under 3 major groups found in the experimental ponds. The net production in T1 was significantly higher than that of T2 indicated the use of duckweed as feed for fishes is economically sustainable in polyculture.
Other Latest Articles
- Effect of training and visit system on professionalizaton of extension agents in osun state agricultural development programme of Nigeria
- Agricultural activities of the malayali tribal for subsistence and economic needs in the mid elevation forest of pachamalai hills, eastern ghats, Tamil Nadu
- Reproductive biology of feather back, chital (Notopterus chitala, Ham.) cultured in a pond of Bangladesh
- Growth and production performances of crossbred climbing perch koi, Anabas testudineus in Bangladesh
- Screening of different tomato varieties in saline areas of Bangladesh
Last modified: 2013-07-22 00:53:48