Performance of the agarophyte Gracilariopsis tenuifrons in a multi-trophic aquaculture system with Litopenaeus vannamei
- PDF / 730,156 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 15 Downloads / 180 Views
Performance of the agarophyte Gracilariopsis tenuifrons in a multi-trophic aquaculture system with Litopenaeus vannamei using water recirculation Marcella Araújo do Amaral Carneiro 1 & Júlia Fanny de Jesus Resende 1 & Sérgio Ricardo Oliveira 2 Felipe de Oliveira Fernandes 1 & Henrique Douglas dos Santos Borburema 1 & Marcelle Stephanne Barbosa-Silva 1 & Ana Beatriz Gomes Ferreira 1 & Eliane Marinho-Soriano 1
&
Received: 11 June 2020 / Revised and accepted: 26 October 2020 # Springer Nature B.V. 2020
Abstract This study aimed to evaluate the performance of the red alga Gracilariopsis tenuifrons as a biofilter in a multi-trophic cultivation system with Litopenaeus vannamei, using recirculation by zero water exchange. The species were cultivated for 4 weeks, while measurements were taken of the chemical and physical characteristics of water, the development of the cultivated organisms (biomass and growth rate), and the carbon, nitrogen, and phosphorus content assimilated by the seaweeds. The water enrichment produced by shrimp farming favored the seaweed development, which increased on average by 2.6 % day-1 ± 0.24 (0.4 to 4.08 % day-1). The seaweed species was able to remove up to 35.1% of the ammonium ion and increased its tissue nitrogen by about 4.8 times by the end of the experiment (1.2–4.8%). The shrimp presented an increase in biomass (8.0 to 12.7 g), with an average growth rate of 1.7% day-1 ± 0.1 and a survival of 100% at the end of the experiment. Based on these results, the cultivation of L. vannamei in a recirculating water system using Gp. tenuifrons as a biofilter can be an advantageous alternative, helping to reduce water usage and remove the main metabolites produced by shrimp cultivation. Keywords Integrated multi-trophic aquaculture (IMTA) . Recirculating aquaculture system (RAS) . Water quality
Introduction Aquaculture has been one of the fastest-growing food-related activities over recent decades (FAO 2018). In Brazil, shrimp farming is considered one of the main cultivation activities, especially in the Brazilian Northeast region (Marinho-Soriano et al. 2002; Marinho-Soriano 2007). Currently, the Rio Grande do Norte state is the largest producer of shrimp in Brazil, and Litopenaeus vannamei is the most commercialized species. However, the expansion of this activity has been putting pressure on natural resources, as effluents are discharged directly into the surrounding water bodies without proper * Marcella Araújo do Amaral Carneiro [email protected] 1
Departamento de Oceanografia e Limnologia, Universidade Federal do Rio Grande do Norte, Via Costeira, Natal, 59014-100 Rio Grande do Norte, Brasil
2
Centro de Tecnologia de Aquicultura, Universidade Federal do Rio Grande do Norte, Av. Principal, Extremoz, 59575-000 Rio Grande do Norte, Brasil
treatment. Due to the large amount of metabolic waste and organic matter from uneaten shrimp feed, the effluents have caused disease proliferation and environmental disturbances. This calls into question the sustainability of this activit
Data Loading...
