Reproductive capacity of Nannochloropsis oculata in different concentrations of salinity and fertilizer: a contribution to aquaculture Bioeconomy
DOI:
https://doi.org/10.5377/ribcc.v6i12.9977Keywords:
Batery, Salinity, Temperature, Nannochloropsis, Nutrients, Aquaculture biioeconomyAbstract
The study was focused on contributing to the Aquaculture Bioeconomy by evaluating the reproductive rhythm of Nannochloropsis oculata in two experimental batteries with saline concentrations of 33 ‰, 25 ‰, 20 ‰, 15 ‰, 10 ‰ and 5 ‰. Single doses of 0.32 ‰ and 1 ‰ of F / 2 Guillard were applied to each one, respectively. Two experiments were carried out at times of 10 and 23 days at a temperature of 25 ºC. The first experiment with 0.32 ‰ of F / 2 Guillard, N. oculata presented a higher number of cells / ml in salinities of 33 ‰ and 25 ‰, at 8 days of study, denoting the affinity of N. oculata to reproduce with greater speed in that salinity range. The importance of using F / 2 Guillard was observed using 1 ‰ because the microalgae has a similar number of cells / ml (P≤0.05) in saline concentrations of 33 ‰, 25 ‰, 20 ‰ and 15 ‰ and similar concentration to microalgae cultured with 0.32 ‰ of F / 2 Guillard in salinities of 33 ‰ and 25 ‰. The capacity of N. oculata was tested in a second experiment where the results show a similar number of cells / ml between the saline treatments, in both batteries, at 23 days of culture. The results show that N. oculata can be cultivated with low concentrations of F / 2 Guillard in salinity ranges between 25 ‰ and 33 ‰, which implies cost reduction.
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