Using residual water from a marine shrimp farming BFT system. Part II: Artemia franciscana biomass production fed microalgae grown in reused BFT water

Abstract

The residual water from intensive aquaculture production systems can be utilized in integrated multitrophic cultivations. In this work, Artemia franciscana received daily feedings of 10 mg L−1 of Tetraselmis chuii, Nannochloropsis oculata and Chaetoceros muelleri, which were grown using residual water from an intensive biofloc Litopenaeus vannamei cultivation system. The goal of this study was to verify which species provide the best zootechnical performance and best crustacean biomass production efficiency. After 12 days of cultivation, A. franciscana wet biomass was 815.64 ± 18.74, 650.81 ± 83.98 and 40.76 ± 4.08 mg L−1 with C. muelleri, T. chuii and N. oculata (P < 0.05), with significant differences in dried biomass as well. As for the microalgae cultivation in the alternative culture medium, T. chuii had higher dry biomass gain, requiring less culture volume to achieve 10 mg L−1 and become ready to feed Artemia. Thus, T. chuii was the most efficient in Artemia biomass production with 0.83 L compared to 1.54 L g art−1 in C. muelleri. C. muelleri is recommended for feeding A. franciscana for biomass production purposes. However, due to its better efficiency, T. chuii can be selected to be part of a multitrophic system.