Abstract
Analysis of pond water and sediment as well as skin and intestine of common carp, cultured under polycultre system, was done quantitatively and qualitatively. During the study of 60 days (winter and summer seasons), total viable counts of bacteria were in the range of 4.43±0.50x103 to 5.5 ±0.09x103 cfu g-1 and 7.43±0.03x103 to 9.66±0.09x103 cfu g-1, respectively in water of A, B and C ponds. In the sediment, bacterial biomass during winter was in the range of 3.23 ±0.06x104 to 4.46± 0.15x104 cfu g-1 and during summer it was found to be in the range of 8.3 0.26x104 cfu g-1 to 9.43± 0.24 x104 cfu g-1. During winter and summer phase, bacterial biomass in skin and intestine was 3.16 0.09 x103 cfu g-1 to 3.56 0.12x103 cfu g-1 and 6.03 0.20 x105-106 cfu g-1 to 7.76 0.20 x105-106 cfu g-1 respectively for all 3 replicates. In total, 10 bacterial genera and 13 dominant species were identified. The bacteria of pond water and sediment reflected the bacterial composition in skin, gill and intestine of the fish. In the pond water, Corynebacterium spp., Aeromonas hydrophila, Pseudomonas spp., Achromobacter sp. and Flavobacter spp. were predominant whereas in pond sediment, Aeromonas hydrophila, Pseudomonas spp., Corynebacterium sp., Flavobacter spp. and Bacillus sp. were predominant and Corynebacterium spp., Aeromonas hydrophila, Flavobacter spp. and Pseudomonas spp. were predominant in skin, gills and intestine of common carp. During the experimental period, Pseudomonas aeruginosa, Aeromonas hydrophila, Flavobacter devorans and Corynebacterium sp. were predominantly present in all the samples in all the phases. Key words: Polyculture, common carp, total viable counts, bacteria sediment, water.
Highlights
Bacteriology is one of the most important areas determining the pond dynamics and health and hygiene of fish farming system
The observations are supported by the findings of Ahmad and Naim (2007) where total bacterial load was in the range of 3.4± 1.8 x to 5.8±0.4 × cfu g-1 in the intestine and 7.1± 0.7x105 to 8.7 ± 1.1x106 cfu g-1 in the gills
Pseudomonas spp. predominated in all the bacterial isolates examined from pond water and sediment
Summary
Bacteriology is one of the most important areas determining the pond dynamics and health and hygiene of fish farming system. The present day fish farming is based on nutritive feeds in addition to other management practices the bacteriology of cultured fishes in the tropics is receiving greater attention since some species of bacteria associated with fish cause diseases under stress condition. Bacteria within pond environment inhabit the water phase, the bottom sediment and live on plants, animals and detritus.
Sign-in/Register to view highlights & summary 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 callDisclaimer: 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.
