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Suppositional measures for harmful microalga Pseudo-nitzschia calliantha control in aquaculture farms

https://doi.org/10.26428/1606-9919-2015-183-236-241

Abstract

Growth of potentially toxic diatom microalga Pseudo-nitzschia calliantha is investigated in laboratory culture under different conditions of cultivation. In the conditions without stirring, the highest abundance of algae was moderate (16131 cells/ml) and observed after 3 days of exposition; many chains of 5-8 cells were formed. Further exposition showed cyclic dynamics of the culture, the chains of 5-12 cells were numerous, chloroplasts looked healthy, their color was olive-green. After stirring, a short lag-phase preceded to the phase of active cells dividing with exponential growth of their number to the peaks of 59828-70566 cells/ml, chains of 2-8 cells were formed but rapidly settled to the vessel bottom, chloroplasts were discrete and bleached that indicated dying of the culture. P. calliantha is potentially toxic species, so the sites with active water circulation or constrained water mixing are recommended for aquaculture farming that protects the environments from its phycotoxins accumulation.

About the Authors

Nina A. Aizdaicher
Институт биологии моря им. А.В. Жирмунского ДВО РАН
Russian Federation


Zh. V. Markina
Институт биологии моря им. А.В. Жирмунского ДВО РАН
Russian Federation


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Review

For citations:


Aizdaicher N.A., Markina Zh.V. Suppositional measures for harmful microalga Pseudo-nitzschia calliantha control in aquaculture farms. Izvestiya TINRO. 2015;183(4):236-241. (In Russ.) https://doi.org/10.26428/1606-9919-2015-183-236-241

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ISSN 1606-9919 (Print)
ISSN 2658-5510 (Online)