Mussels do not directly assimilate fish farm wastes: Shifting the rationale of integrated multi-trophic aquaculture to a broader scale

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Título: Mussels do not directly assimilate fish farm wastes: Shifting the rationale of integrated multi-trophic aquaculture to a broader scale
Autor/es: Sanz-Lázaro, Carlos | Sanchez-Jerez, Pablo
Grupo/s de investigación o GITE: Biología Marina
Centro, Departamento o Servicio: Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada
Palabras clave: Coastal pollution | Fish farming | IMTA | Mediterranean | Mytilus galloprovincialis | Stable isotopes
Área/s de conocimiento: Zoología
Fecha de publicación: 1-oct-2017
Editor: Elsevier
Cita bibliográfica: Journal of Environmental Management. 2017, 201: 82-88. doi:10.1016/j.jenvman.2017.06.029
Resumen: Pollution is one of the most significant issues that is currently impeding the development of fish farming. Integrated multi-trophic aquaculture (IMTA) has the potential to reduce the accumulation of organic wastes in the environment by using taxa of lower trophic levels such as filter feeders. However, the capacity of filter feeders to assimilate significant quantities of fish farm wastes has not yet been fully tested in situ. We analyzed the stable isotopes δ13C and δ15N in mussels from six fish farms and from six other areas that were not influenced by fish farming, at two water strata (surface and mid-water) across a marked gradient of eutrophication along more than 900 km of coastline in the Western Mediterranean. We found that the mussels did not directly assimilate fish farming wastes. Consequently, fish farming wastes did not constitute a major component of mussel diet, irrespective of local productivity and depth in the water column. These outcomes do not necessarily mean that IMTA is not suitable in other cases, but rather that there should be a shift in the rationale of IMTA by modifying the concept of direct assimilation of wastes to a more general approach of IMTA based on regional budgets of nutrients.
Patrocinador/es: This work has been funded by the projects: GRE14-19 from the University of Alicante, GV/2015/001 from the ‘Conselleria de Educación, Cultura y Deporte’ of the government of the Valencia region and CGL2015-70136-R from the Ministerio de Economía y Competitividad (MINECO/FEDER) of Spain. CS was funded by the contract ‘Juan de la Cierva’ (ref. JCI- 2012-12413) from MINECO.
URI: http://hdl.handle.net/10045/68544
ISSN: 0301-4797 (Print) | 1095-8630 (Online)
DOI: 10.1016/j.jenvman.2017.06.029
Idioma: eng
Tipo: info:eu-repo/semantics/article
Derechos: © 2017 Elsevier Ltd.
Revisión científica: si
Versión del editor: http://dx.doi.org/10.1016/j.jenvman.2017.06.029
Aparece en las colecciones:INV - BM - Artículos Científicos / Scientific Papers

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