Open AccessEvaluation of bacterial strains to improve the productivity of microalgae used in bivalve hatcheries in Peru
Author(s) -
Ríos Castro Natalí,
Zavala Jóselyn,
GilKodaka Patricia,
Diringer Benoit
Publication year - 2022
Publication title -
journal of the world aquaculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0893-8849
DOI - 10.1111/jwas.12858
Subject(s) - biology , isochrysis galbana , scallop , bacteria , microbiology and biotechnology , tetraselmis suecica , shellfish , botany , food science , algae , ecology , aquatic animal , fishery , fish <actinopterygii> , genetics
The microalgae Isochrysis galbana and Chaetoceros gracilis are part of the basic diet of most bivalve cultures. This study evaluated the supplementation of bacterial strains naturally associated with these microalgae to improve their productivity. Ten bacterial strains collected from I . galbana and C . gracilis commercial cultures used in the larviculture of the Peruvian scallop Argopecten purpuratus were isolated and purified. These strains were individually coinoculated to each microalgal culture to confirm their promoter effect on growth. First, inoculation was carried out in a volume of 500 mL with constant aeration, which allowed the selection of the best bacterial strains. Then, the culture growth performance after transfer from 500 mL to 2 L tanks, with and without bacterial reinoculation during transfer, was monitored. Two bacterial strains, Lysinibacillus fusiformis and Bacillus cereus , significantly improved ( α = .05) I . galbana production, whereas three other strains, Lysinibacillus sp., Psychrobacter celer , and Staphylococcus saprophyticus , significantly increased ( α = .05) the growth of the C . gracilis culture. The use of microalgae supplemented with bacteria did not significantly affect A . purpuratus larval rearing. Altogether, these results showed the potential of native probiotic bacteria to improve microalgal production within bivalve hatcheries.