Aquaculture Europe 2021

October 4 - 7, 2021

Funchal, Madeira

Add To Calendar 07/10/2021 10:20:0007/10/2021 10:40:00Europe/LisbonAquaculture Europe 2021EFFECT OF TILAPIA Oreochromis niloticus ON SUSPENDED SOLIDS CONSUMPTION WHEN INTEGRATED WITH Litopenaeus vannamei IN BIOFLOC SYSTEMMezzanine-CasinoThe European Aquaculture Societyalistair@aquaeas.eufalseanrl65yqlzh3g1q0dme13067DD/MM/YYYY

EFFECT OF TILAPIA Oreochromis niloticus ON SUSPENDED SOLIDS CONSUMPTION WHEN INTEGRATED WITH Litopenaeus vannamei IN BIOFLOC SYSTEM

 

 

 L. Poersch, M. Holanda, A. Cardoso, G. Lara ,  P. Furtado,  G.  Santana and  W. Wasielesky

 

Federal University of Rio Grande – FURG – Institute of Oceanography – Rua do Hotel, 02. CEP 96210-030, Rio Grande, RS, Brazil

 E-mail: lpoersch@gmail.com



Introduction

T otal suspended solids (TSS) increase during the  shrimp  production in BFT system , which can affect water quality and  animal performance. To control the excess of TSS during  the shrimp production in the BFT system  can  be used mechanical filters  (settling tanks) or the alternative  integration with species that act in different trophic levels – Integrated Multitrophic Aquaculture (IMTA).  The present study aimed to evaluate two stocking densities of tilapia in integrated culture with the shrimp Litopenaeus vannamei in biofloc system on a pilot scale.

Material and Methods

Two stocking densities of tilapia were tested, 35 and 65 fish m-3 in a recirculating system with 18 m³ tanks for shrimp culture and 4 m³ for tilapia culture with recirculation of 965.66 ± 92.83 L h-1 during 78 days. The initial weight of the shrimp was 0.9±0.1 g and of the tilapia was 7.1±3.2 g . The shrimp received the amount of feed according to the feeding table and the fish were underfed to stimulate them to consume the bioflocs .

Results

Tilapia densities did not affect shrimp growth (11.5±1.9 g for treatment with 35 fish m-3 and 10.1±0.7 g for treatment with 65 fish m-3 ). The tilapia presented a FCR less than 1, proving the consumption of the bioflocs by the fish. The clarification time was shorter when compared to other studies with shrimp monoculture and among the treatments, where there was lower fish stocking density, there was a reduction of 10 hours in the system clarification when compared to the treatment with higher fish stocking density. The results demonstrate the feasibility of integrated shrimp and tilapia culture on a pilot scale, without compromising shrimp productivity.