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Assessing fish quality status in transitional waters, within the European Water Framework Directive. Setting boundary classes and responding to anthropogenic responses Uriarte, A.; Borja, A. (2009). Assessing fish quality status in transitional waters, within the European Water Framework Directive. Setting boundary classes and responding to anthropogenic responses. Est., Coast. and Shelf Sci. 82(2): 214-224. dx.doi.org/10.1016/j.ecss.2009.01.008 In: Estuarine, Coastal and Shelf Science. Academic Press: London; New York. ISSN 0272-7714; e-ISSN 1096-0015, meer

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 280268 [ download pdf ]

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Trefwoorden

Ecology Elements > Nonmetallic elements > Oxygen Environmental factors > Anthropogenic factors Indicators Musculoskeletal system > Anatomical structures > Skeleton > Endoskeleton > Bones > Vertebrae Quality Pisces [WoRMS]

Author keywords

anthropogenic pressures; indicators; fishes; ecological status; oxygen; Water Framework Directive (WFD); Basque Country

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Auteurs		Top
Uriarte, A. Borja, A.

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Abstract

Validation of the AZTI's Fish Index (AFI), proposed for the Basque Country (northern Spain), in assessing fish quality within the Water Framework Directive (WFD), is undertaken. The response to anthropogenic pressure is investigated, in setting the boundaries between the different quality status classes. Hence, 12 estuaries were sampled, at different frequencies, between 1989 and 2007, by means of a beam trawl. Significant (p < 0.0001) correlations were found between the AFI and oxygen saturation and ammonia. Oxygen quality standards are used to set boundaries between quality classes. Then, the AFIs obtained are compared with different anthropogenic pressures, including urban and industrial discharges, engineering works and dredging. The effects of the removal of some of these pressures are also studied. The total number of pressures within an estuary shows significant (p < 0.009) negative correlation with AFI, explaining between 51 and 62% of the variability in fish quality. The impact of pressures upon fish and demersal assemblages is detected as required by the WFD. Nonetheless, further investigation and intercalibration of the methods used, are necessary.

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