{"id":97861840,"date":"2020-11-16T12:00:06","date_gmt":"2020-11-16T11:00:06","guid":{"rendered":"https:\/\/fundacion-biodiversidad.es\/programa_pleamar\/poliaqua-study-and-industrial-development-of-integrated-fish-macroalgae-macroherbivorous-polyculture-systems-that-allow-the-use-of-effluents-from-aquaculture-facilities\/"},"modified":"2020-11-16T12:00:06","modified_gmt":"2020-11-16T11:00:06","slug":"poliaqua-study-and-industrial-development-of-integrated-fish-macroalgae-macroherbivorous-polyculture-systems-that-allow-the-use-of-effluents-from-aquaculture-facilities","status":"publish","type":"programa_pleamar","link":"https:\/\/fundacion-biodiversidad.es\/en\/programa_pleamar\/poliaqua-study-and-industrial-development-of-integrated-fish-macroalgae-macroherbivorous-polyculture-systems-that-allow-the-use-of-effluents-from-aquaculture-facilities\/","title":{"rendered":"POLIAQUA – Study and industrial development of integrated fish-macroalgae-macroherbivorous polyculture systems that allow the use of effluents from aquaculture facilities."},"content":{"rendered":"

\n Description<\/strong>\n <\/p>\n

Fish ingest food, metabolize it and generate ammonium and phosphorus that is released into the environment in which they are found. In the specific case of farmed fish, these products pass into the water of the culture tanks and then into their effluents. Therefore, taking into account that both ammonium and the reactive phosphates produced can be used by seaweed to grow, it would be very interesting to use these nutrient-rich effluents to grow macroalgae that in turn can be used to feed macroherbivores. <\/p>\n

In this context, the main objective of the POLIAQUA project is to evaluate and develop innovative industrial-level integrated polyculture (IMTA) technologies in Spanish aquaculture.<\/strong> Specifically, it is proposed to carry out multitrophic cultures, taking advantage of the nitrogen and phosphorus produced in the cultivation of turbot (Scophthalmus maximus<\/em>) as nutrients to cultivate macroalgae that, in turn, are used to fatten a macroherbivorous mollusc of high commercial value, highly appreciated in Asian markets, such as abalone (Haliotis tuberculata<\/em>).<\/p>\n

This will reduce the amount of nitrogen and phosphorus produced, making the activity more environmentally friendly, and take advantage of the water that was pumped to cultivate the fish, which will optimize energy consumption and help improve the image of aquaculture in the eyes of public opinion.<\/p>\n

It is proposed to use species of algae that are found in the environment or even in the facilities of the center in which the project is developed, to take advantage of the adaptation of the algae to the conditions of the area and avoid the introduction of foreign biological material in the event of accidental release of specimens, gametes or spores into the environment.<\/p>\n

The first thing to do is to identify the species present and their availability. Then, culture and biofiltration tests will evaluate which of them are likely to be used on a pilot scale as a biofilter and as a source of biomass for the cultivation of abalone. The characteristics of the effluents of turbot cultivation will also be described to determine the conditions for the cultivation of algae. <\/p>\n

Once the algae species with the best characteristics have been chosen for cultivation at an industrial level, pilot scale culture tests will be carried out to collect information on the production and biofiltration characteristics of the species, as well as on their ability to feed the abalone, comparing the use of these algae with that of commercial feed.<\/p>\n

The results of this study will be shared with the companies that are part of CETGA and with all those people and institutions interested in this new technology. Innovation will reduce nutrients lost as waste, benefiting the environment. It will also diversify and boost the Spanish aquaculture sector, by generating a new economic activity through the cultivation of seaweed and abalone, which is in an initial state of industrial exploitation in Europe. <\/p>\n

\n

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