Performance of polypropylene and cotton sheet, as bacterial substrata, on water quality, growth and survival of carp (Cyprinus carpio Linnaeus, 1758) larvae in a recirculating culture system

Document Type : scientific research article

Authors

1 Professor, Department of fisheries, Faculty of natural Resources, University of Tehran, Karaj, Iran.

2 گروه شیلات،پردیس کشاورزی و منابع طبیعی دانشگاه تهران، دانشکده منابع طبیعی، کرج، ایران.

Abstract

An experiment was conducted to determine the efficiency of two kinds of substrata (Polypropylene and cotton sheet), as biofilter media on removal of N-compounds and fish growth in a recirculating culture system for a 6-week period. Rates of survival was significantly different between treatments(p < 0.05). The mean (± SD) initial individual weight of fish was 3.4 ± 0.20 g and the fish attained to 9.19 ± 0.53 and 7.79 ± 0.38g in treatments with cotton sheet and polypropylene, respectively at the end of experimental period. Concentration of total nitrogen, total ammonia-N and nitrate were significantly different (p < 0.05) between treatments at the end of the experiment. Concentration of total ammonia-N reached to 0.050 ± 0.0021 and 0.054 ± 0.0039 mg L-1 in cotton sheet and propylene treatments, respectively. The electro-conductivities were significantly different and attained to 970± 0.32 and 900 ± 51.3µmos/cm in treatments with cotton sheet and propylene, respectively, at the end of experiment(p < 0.05). It was concluded that cotton sheet, can be used as an efficient bacterial substrate or medium in a recirculating carp culture system.

Keywords

References

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Journal of Utilization and Cultivation of Aquatics
Volume 10, Issue 2
September 2021
Pages 13-21

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