Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/106641
Title: Response of different benthic habitats to off-shore fish cages
Authors: Riera, R. 
Becerro, M.A.
Ramos, E.
Monterroso, O.
Rodríguez, M.
UNESCO Clasification: 240119 Zoología marina
Keywords: Fish cages
Buffer area
Seagrass
Sandy seabeds
Macrofauna
Issue Date: 2015
Journal: Aquaculture Research 
Abstract: Off‐shore fish farming can increase the organic load of nearby coastal marine ecosystems due to the deposition of fish food and faeces on seabeds. Seagrass meadows are particularly affected by aquaculture activities but there are few empirical data showing differential effects of the same farming activity on multiple habitat types. Here, we assessed over a 2‐year period whether macrofaunal assemblages inhabiting sandy bare seabeds and Cymodocea nodosa meadows varied in their macrofaunal community structure to the fish farming activities. We observed high spatial and temporal variability in macrofauna composition and dynamics among seabed habitats and a limited impact of fish cages in their area of influence as compared with control areas. Seagrass meadows showed a higher abundance in macrofauna communities than sandy bare bottoms. Local marine currents could partially explain some results because of their influence on grain size composition. Differences in grain size resulted in higher abundances of the tanaid Apseudes talpa beneath fish cages and the absence of the sensitive amphipod Ampelisca brevicornis. Differences of resilience of seabeds (seagrass meadows and sandy bare bottoms) should be taken into account for environmental monitoring studies of off‐shore fish cages. Our results suggest that hydrodynamics are a key factor to determine buffer areas between fish cages and seagrass meadows.
URI: http://hdl.handle.net/10553/106641
ISSN: 1355-557X
DOI: 10.1111/are.12306
Appears in Collections:Artículos
Show full item record

Page view(s)

18
checked on Apr 11, 2021

Google ScholarTM

Check

Altmetric


Share



Export metadata



Items in accedaCRIS are protected by copyright, with all rights reserved, unless otherwise indicated.