<abstract xmlns="http://www.w3.org/1999/xhtml"> The study focused on the development of co-cultivation schemes for Daphnia magna (Straus) and Desmodesmus armatus (Chod.) Hegew. Wastewater from a recirculating aquaculture system (RAS) was used as a medium for co-cultivation. Three schemes for D. magna and algae co-cultivation that differed in the timing of the introduction of Daphnia into the system were tested. Initially, D. armatus algae were cultivated to the exponential growth phase until cell numbers reached 5 × 104 cell × 1-1. This algal culture was introduced into the system for joint cultivation. D. magna was added immediately on the same day or three or six days after the algae. The number of D. magna individuals and the number of D. armatus cells were analyzed. It was established that the optimal scheme is the simultaneous introduction of algae and crustaceans into the cultivating system. By implementing this system it was possible to increase the number and biomass of D. magna by ten times in comparison to initial values.The biochemical composition of the D. magna obtained after co-cultivation and Daphnia that was fed traditionally once every 48 h with the same algae or yeast, Saccharomyces cerevisiae, was also compared. The scheme applied for D. magna and D. armatus simultaneous co-cultivation rendered it possible to obtain a biomass of Daphnia that was characterized by a protein content of 82.5% lipids of 6.7%, and carotenoids of 15.3 mg × g-1.</abstract>

The study focused on the development of co-cultivation schemes for Daphnia magna (Straus) and Desmodesmus armatus (Chod.) Hegew. Wastewater from a recirculating aquaculture system (RAS) was used as a medium for co-cultivation. Three schemes for D. magna and algae co-cultivation that differed in the timing of the introduction of Daphnia into the system were tested. Initially, D. armatus algae were cultivated to the exponential growth phase until cell numbers reached 5 × 104 cell × 1-1. This algal culture was introduced into the system for joint cultivation. D. magna was added immediately on the same day or three or six days after the algae. The number of D. magna individuals and the number of D. armatus cells were analyzed. It was established that the optimal scheme is the simultaneous introduction of algae and crustaceans into the cultivating system. By implementing this system it was possible to increase the number and biomass of D. magna by ten times in comparison to initial values.The biochemical composition of the D. magna obtained after co-cultivation and Daphnia that was fed traditionally once every 48 h with the same algae or yeast, Saccharomyces cerevisiae, was also compared. The scheme applied for D. magna and D. armatus simultaneous co-cultivation rendered it possible to obtain a biomass of Daphnia that was characterized by a protein content of 82.5% lipids of 6.7%, and carotenoids of 15.3 mg × g-1.

Co-cultivation of Daphnia magna (Straus) and Desmodesmus armatus (chod.) Hegew. in recirculating aquaculture system wastewater

Fisheries & Aquatic Life

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

The study focused on the development of co-cultivation schemes for Daphnia magna (Straus) and Desmodesmus armatus (Chod.) Hegew. Wastewater from a...

Co-cultivation of Daphnia magna (Straus) and Desmodesmus armatus (chod.) Hegew. in recirculating aquaculture system wastewater

Published Online: Jun 12, 2018

Page range: 57 - 64

Received: May 17, 2017

Accepted: Jan 05, 2018

DOI: https://doi.org/10.2478/aopf-2018-0007

Keywords
Daphnia magna, Desmodesmus armatus, co-cultivation, feeding scheme, proteins, lipids, carotenoids

© 2018 Larysa Cheban, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Co-cultivation of Daphnia magna (Straus) and Desmodesmus armatus (chod.) Hegew. in recirculating aquaculture system wastewater

Published Online: Jun 12, 2018

Page range: 57 - 64

Received: May 17, 2017

Accepted: Jan 05, 2018

DOI: https://doi.org/10.2478/aopf-2018-0007

KeywordsDaphnia magna, Desmodesmus armatus, co-cultivation, feeding scheme, proteins, lipids, carotenoids

© 2018 Larysa Cheban, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
Daphnia magna, Desmodesmus armatus, co-cultivation, feeding scheme, proteins, lipids, carotenoids