“Impact of biofloc bacterial consortia on growth performance and quality of Catla catla fingerlings”

Abstract

The sustainable aquaculture practice is Biofloc technology (BFT) which is enhancing fish growth and
nutritional quality by the activity of significant microbial consortia. The present study evaluated the
impact of biofloc-associated bacterial consortia on water quality, growth performance, survival, as well
as muscle proximate composition of Catla catla fingerlings. These 50 days investigation was carried
out in the Zoology Department of Shri Shivaji College, Parbhani, situated in Marathwada region of
Maharashtra, India, using control tanks fed with conventional feed and biofloc tanks supplemented
with biofloc containing heterotrophic bacterial consortia. Bacterial isolates were obtained from biofloc
samples and identified up to species level as through 16S rRNA gene sequencing and constructed
phylogeny revealed DPBF16 showed maximum similarity with Nitrosomonas oligotropha BKP NS27,
DPBF19 with Lactobacillus plantarum strain, DPBF21 with Nitrobacter vulgaris SGUV-3, DPBF23
with Bacillus cereus BF2 and DPBF27 showed maximum similarity with Pseudomonas aeruginosa
CP1. Submission of obtained sequences to NCBI GeneBank were carried out and got the accession
numbers as DPBF16: PX875990, DPBF19: PX 875986, DPBF21: PX875988, DPBF23: PX875983
and DPBF27: PX875991 from the NCBI GenBank.