Abstract：
: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.
journal_name
J Environ Managejournal_title
Journal of environmental managementauthors
Sanz-Lazaro C,Sanchez-Jerez Pdoi
10.1016/j.jenvman.2017.06.029subject
Has Abstractpub_date
2017-10-01 00:00:00pages
82-88eissn
0301-4797issn
1095-8630pii
S0301-4797(17)30611-4journal_volume
201pub_type
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