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Title: Effects of proximity to offshore fish farms over soft-bottom macrofauna
Authors: Riera, R. 
Tuya, Fernando 
Pérez, Óscar
Ramos, Eva
Rodríguez, Myriam
Monterroso, Óscar
UNESCO Clasification: 3105 Peces y fauna silvestre
251092 Acuicultura marina
Keywords: Aquaculture
Sandy seabeds
Canary Islands, et al
Issue Date: 2015
Project: Dispersión de Materia Orgánica en Granjas de Acuicultura: Desarrollo de Un Modelo Matemático Para Garantizar Su Sostenibilidad Ambiental E Identificado Por El Acrónimo Macromod 
Journal: Journal of the Marine Biological Association of the United Kingdom 
Abstract: Sea-cage fish farms impact the seabed within their immediate vicinity, potentially affecting recipient communities. We assessed whether proximity to three sea-cage fish farms at the Canary Islands altered patterns in the abundance, assemblage structure and richness of soft-bottom macrofauna. We related among-farm variability in dissimilarities in macrofaunal assemblage structure between seabeds beneath cages and controls to differences in hydrodynamics, production and seabed topography. Contrasting patterns of species abundances with varying proximity to fish farms were observed: some species decreased while other species increased their abundances with increasing distance at some farms. Although faunal assemblages at 0 m (i.e. beneath the cages) were different, in terms of assemblage structure, from those found at controls, pairwise differences in assemblage structure among distances away varied among the studied fish farms. Species richness showed inconsistent patterns with proximity to cages among fish farms. In summary, inconsistent patterns of macrofaunal assemblages with varying proximity to aquaculture facilities preclude confident predictions on the way offshore aquaculture alters macrofauna in the study region.
ISSN: 0025-3154
DOI: 10.1017/S0025315414001386
Source: Journal of the Marine Biological Association of the United Kingdom [ISSN 0025-3154], v. 95(2), p. 255-263
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