Abstract
An experiment was carried out on the effects of periphyton on monoculture of Thai sharputi, Puntius gonionotus at the Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh during 7th August to 8th November. In treatment-1 bamboo poles were used as artificial substrate for periphyton production and in treatment-2 there was no artificial substrate (control). Each of the six ponds was stocked with 150 fingerlings of average size 6.41 cm and 3.60 g. The ponds were fertilized fortnightly with manure (cow dung) at a rate of 10 kg decimal-1, urea 60 g decimal-1 and triple super phosphate 90 g decimal-1. During the experimental period, the ranges of physico-chemical parameters viz. air temperature (31.0-35.50C), water temperature (29-320C), water depth (0.56-0.84 m), transparency (32-63 cm), dissolved oxygen (3.5-7.8 mg L-1), pH (6.8-7.9), total alkalinity (44-92 mg L-1), free CO2 (1.5-4.0 mg L-1), phosphate-phosphorus (0.31-1.07 mg L-1) and nitrate-nitrogen (1.12-2.30 mg L-1) were within the productive range and more or less similar in the ponds under treatments-1 and 2. Among the observed biological parameters, there were 35 genera of phytoplankton composed of five groups and 13 genera of zooplankton composed of four groups in the experimental ponds. Thirty three genera under the groups of Bacillariophyceae, Chlorophyceae, Cyanophyceae and Euglenophyceae formed the periphyton on bamboo poles in the experimental ponds. Net fish production of the ponds with periphyton under treatment-1 was about 1.5 times higher than those of the ponds without periphyton (treatment-2). By analysis of variance, it was found that the net fish production of Thai sharputi under treatment-1 was significantly higher than that under treatment-2 (p< 0.05). Finally, it can be concluded that periphyton is one of the preferable food item of Thai sharputi and it is also suggested that growth and production of Thai sharputi can be increased if arrangement is made for periphyton production.
 Int. J. Agril. Res. Innov. & Tech. 8 (2): 13-23, December, 2018
Highlights
In Bangladesh, most farmers in rural areas have ponds and ditches
Locally available low-cost materials, bamboo poles were used as artificial substrate to grow periphyton as natural food for fishes
The effects of periphytons, produced on artificial substratum, on the growth and production of planktivorous fish Puntius gonionotus were not studied. Considering these facts the present study was undertaken with the objectives to estimate the periphyton that grows on bamboo poles qualitatively and quantitatively; to determine the water quality parameters of the ponds under the experiment; to estimate the plankton population of the experimental ponds both qualitatively and quantitatively; and to determine the effect of periphyton on monoculture of Thai sharputi (Puntius gonionotus)
Summary
In Bangladesh, most farmers in rural areas have ponds and ditches. small scale fish culture can be done in these water bodies. Periphyton based fish culture can be an easy method for fish culture which might be practiced by the poor farmers in our country In this experiment, locally available low-cost materials, bamboo poles were used as artificial substrate to grow periphyton as natural food for fishes. Periphyton is one of preferable food materials for some fishes especially Thai sharputi (Puntius gonionotus) It is one of the most important herbivorous species commercially cultivated in freshwater ponds. The effects of periphytons, produced on artificial substratum, on the growth and production of planktivorous fish Puntius gonionotus were not studied Considering these facts the present study was undertaken with the objectives to estimate the periphyton that grows on bamboo poles qualitatively and quantitatively; to determine the water quality parameters of the ponds under the experiment; to estimate the plankton population of the experimental ponds both qualitatively and quantitatively; and to determine the effect of periphyton on monoculture of Thai sharputi (Puntius gonionotus)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Agricultural Research, Innovation and Technology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
