Study on the mycofiltration of water and its application in fish culture
Loading...
Date
2019-08
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
The present study was designed to evaluate the effect of mycofiltration in fish culture. The experiment consists of seven treatments in triplicates as per water filtration rate viz T0(control treatment), T1 (8000 litre/day water filtration through mushroom spent bags), T1´(8000 litre/day water filtration through RAS), T2 (4000 litre/day water filtration through mushroom spent bags), T2´(4000 litre/day water filtration through RAS), T3 (2000 litre/day water filtration through mushroom spent bags) and T3´(2000 litre/day water filtration through RAS). Healthy and disease free fingerlings, of three fish species viz. Ctenopharyngodon idella, Cyprinus carpio haematopterus and Labeo rohita weighing with average weight 10±0.5 gm, 10±0.3 gm, 20±0.5 gm were stocked at the rate of 100 fingerlings/tank (25 fingerlings/m3) in the ratio of 35:35:30, respectively in the treatment tanks. The fingerlings were fed with 28% protein dry pelleted feed @ 3-5 % body weight. Evaluation of different physico-chemical parameters, heavy metals and microbial load was done in all the treatment tanks. Weekly analysis of water quality parameters viz temperature, conductivity, total dissolved solids, dissolved oxygen, free carbon dioxide, pH, total alkalinity, ammonia, nitrate and phosphate was done to observe their variation in different treatment groups.During the experiment different range of physico-chemical parameters was obtained in all the experimental tanks viz Temperature (15.2-28.7°C), conductivity (312-594.75μS cm-1), total dissolved solids (156-391.75 mgL-1 ), dissolved oxygen (3.5-7.17 mgL-1), free carbon dioxide (1-5.4 mgL-1), pH (6.7-8.2), total alkalinity (66.5-259 mgL-1), ammonia (0.012-0.24 mgL-1), nitrate (0.1-5.2 mgL-1) and phosphate (0.01-0.62 mgL-1). The net weight gained during the investigation period by experimental fishes Labeo rohita, Ctenopharyngodon idella, Cyprinus carpio haematopterus, in the treatment groups was 116.59-133.13g, 103.42-123.28g, 51.37-59.36g respectively. Evaluation of heavy metals and microbial load done during the study period resulted in decrease in the concentration of heavy metals and microbial load at the end of the experiment. The above research revealed that mycofiltration technique is useful for the growth of fishes in the polluted water bodies with heavy metals and microbial load. This technique makes the suitable condition of the hydrographical parameters and does not cause stress in the environment for the fishes. It is an integrated technique with mushroom cum fish culture and is easy to be handled and very cost effective.
Description
Keywords
null