2025_programme: Advances in biomass estimation of Nile tilapia aquaculture with acoustic methods

• Day: June 16, Monday
    Location / Time: C. THALIA at 17:00-17:20
• Last minutes changes: -
• Session: 10. New frontiers in fisheries acoustics: applications, analysis, decision and management tools
  Organiser(s): Victor Espinosa
  Chairperson(s): Victor Espinosa
• Lecture: Advances in biomass estimation of Nile tilapia aquaculture with acoustic methods
  Paper ID: 2283
  Author(s): Luis Lorenzo Carrillo La Rosa, Vicente Puig-Pons, Sergio Morell-Monzó, Isabel Pérez-Arjona, Víctor Espinosa
  Presenter: Víctor Espinosa
  Abstract: Nile tilapia (Oreochromis niloticus) is the second most farmed fish species globally, with an annual production exceeding 5 million tons, and its growth is expected to continue. Traditional biomass estimation relies on catch-and-release sampling methods, which can be invasive and labor-intensive. Acoustic methods have emerged as a promising alternative; however, the high cost of scientific echo-sounders limits their feasibility in aquaculture. This study presents advances in biomass estimation of Nile tilapia under production-like conditions using target strength (TS). First, a biometric length-weight relationship model was developed using real specimens. Then, a Biosonics DT-X echo sounder equipped with a single-beam transducer operating at 200 kHz was used. The accuracy of biomass estimation based on TSmax and TSmean was evaluated across eight size groups (ranging from 14.1 to 43.7 cm), achieving an R² > 0.9. These results demonstrate the potential of low-cost acoustic methods for effective biomass monitoring in aquaculture systems.
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• Corresponding author: Dr Sergio Morell-Monzó
  Affiliation: Instituto de Investigación para la Gestión Integrada de Zonas Costeras (IGIC). Universitat Politècnica de València, EPS Gandia (Gandia, Spain)
  Country: Spain