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Impact of sea-cage fish farms on intertidal macrobenthic assemblages

Published online by Cambridge University Press:  24 May 2004

A. Boyra ,
F.J.A. Nascimento ,
F. Tuya ,
P. Sanchez-Jerez  and
R.J. Haroun
A. Boyra
Affiliation:
Department of Biology, Faculty of Marine Sciences, University of Las Palmas de Gran Canaria, 35017, Las Palmas, Canary Islands, Spain
F.J.A. Nascimento
Affiliation:
Centro de Maricultura da Calheta, Governo Regional da Madeira, 9370-Calheta, Madeira, Portugal
F. Tuya
Affiliation:
Department of Biology, Faculty of Marine Sciences, University of Las Palmas de Gran Canaria, 35017, Las Palmas, Canary Islands, Spain
P. Sanchez-Jerez
Affiliation:
Marine Biology Laboratory, University of Alicante, POB 99, E-03080, Alicante, Spain
R.J. Haroun
Affiliation:
Department of Biology, Faculty of Marine Sciences, University of Las Palmas de Gran Canaria, 35017, Las Palmas, Canary Islands, Spain
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Abstract

The influence of two sea-cage fish farms at Gran Canaria Island (Canary Islands, central east Atlantic Ocean) on the intertidal macrobenthic assemblages was studied. Two controls and two impact locations were established at each farm. The composition and coverage of the macrobenthic assemblages were surveyed every three months using image processing analyses. Significant dissimilarities were found between control and impact locations at both sea-cage fish farms. The presence of: (1) algal species tolerant to pollution (Caulerpa racemosa and Corallina elongata); and (2) filter-feeding fauna (Anemonia sulcata) at impact locations, indicate that the fish farming activity is causing an effect on the surrounding intertidal macrobenthic assemblages of both sea-cage fish farms.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 84 , Issue 3 , June 2004 , pp. 665 - 668
Copyright
2004 Marine Biological Association of the United Kingdom

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