Influence of the agitation method in the growth of Algae tanks (Ulva ohnoi) integrated in a multitrophic aquaculture system (IMTA)

Integrated multitrophic aquaculture is gaining importance between fish producers because it can improve the sustainability of this activity by using fish wastes to grow up algae species of commercial interest, in our case Ulva ohnoiSpanish Ministerio de Economia y Competitividad (AGL2013-41868-R)Postprint (published version

Use of the tank resistance coefficient to evaluate modifications of water inlet devices in rotating flowtanks

Peer Reviewe

Diseño de tanques en acuicultura intensiva

Article en revista divulgativa: ipac Acuicultura 64, pp 14-15El diseño apropiado de los tanques para una instalación acuícola debe ajustarse al comportamiento de la especie, optimizando su actividad natatoria y mejorando el bienestar a través de la reducción del nivel de estrés.Postprint (published version

Distribution of velocities in aquaculture circular tanks with rotating flow and evaluation of uniformity

Postprint (published version

Efficient implementation with FIR filters of operators based on B-splines to represent and classify signals of one and two dimensions

Peer ReviewedPostprint (published version

Influence of fish swimming on the flow pattern of circular tanks

The effect of swimming fish on the average velocity and velocity profile of a circular tank was studied. Working with different inlet diameters and flow rates, nine different impulse forces (configurations) were evaluated. Each configuration was tested with and without fish, and the effects of two different fish sizes were compared. The velocity profiles in experiments with fish presented a considerable reduction in velocity in the centre of the tank near the outlet, which was a consequence of the increase in the kinematic eddy viscosity due to the turbulence introduced by fish swimming. A flattening of the angular velocity profile was observed in the central area of the tank, which had a radius of about 0.3 m (18% of the total volume of the tank). A previous model proposed by Oca and Masaló (2013) was modified in order to better describe the distribution of velocities in the central volume of a tank with swimming fish. The proposed modification was based on Burgers¿ proposal for a bathtub vortex, which implies the determination of the parameter (1¿e¿ar2)(1¿e¿ar2), where r is the radius and the a values were experimentally obtained for each tank configuration, in which they increased with the impulse force. The average velocities in the tank were proportional to the square root of the impulse force in experiments with and without fish. Experiments with fish presented lower average velocities, which imply higher tank resistance coefficients. At similar stocking densities (14.6 kg/m3), the increase in the tank resistance coefficients obtained with small fish sizes (154 g) were slightly higher than those obtained with bigger fish sizes (330 g).This work was funded by Spanish Ministerio de Educación y Ciencia (AGL2009-1655).Postprint (updated version

Design criteria for rotating flow cells in rectangular aquaculture tanks

Peer Reviewe

Growth and nutrient uptake of the seaweed Ulva ohnoi integrated in a Solea senegalensis recirculating system: influence of lighting, stocking density and CO2

The integrated production of fish and seaweeds can improve the sustainability of the marine aquaculture industry. Seaweeds remove the nutrients dissolved in fish-farm effluents and can become a good source of proteins, carbohydrates and bioactive compounds of commercial interestPostprint (published version

Experimental colonization of Ulva spp. with algal-epiphytic antagonistic bacteria as a strategy for pathogen control in integrated multi-trophic aquaculture recirculating systems

Probiotics are a potential tool for bacterial control in aquaculture (Pintado et al. 2011), decreasing the use of disinfectants and antibiotics and contributing to an ecosystem approach, which is more sustainable and respectful to the environment.Postprint (published version