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Fish fauna as an indicator of environmental quality in an urbanised region of the Amazon estuary

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This study describes the biological importance of Guajará Bay (Belém, Pará, Brazil) for fish fauna and presents a diagnosis of water quality in the main channel and creeks, using the icthyofauna as an ecological indicator. A total of 567 individuals from 40 species were identified. About 58% of these use Guajará Bay as a nursery ground, 49 and 81% use the bay as a breeding and feeding ground, respectively. There were no significant differences between environments as measured by the diversity index; however, fish relative abundance (catch per unit of effort) was greater in the creeks than in the main channel. A significant difference was detected in the fish fauna inhabiting the main channel compared with the creeks. In the main channel, icthyofauna significantly differed during December relative to other months.
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Keywords: Brazil; Guajará Bay; ecological indicator; icthyofauna; urban contamination

Document Type: Regular Paper

Affiliations: 1: Instituto de Geociência, Universidade Federal do Pará, Avenida Augusto Corrêa, S/N, Guamá, CEP. 66075-110, Belém/PA, Brazil 2: Instituto Federal de Educação, Ciência e Tecnologia, Campus Castanhal, Br. 316, KM. 62, Brazil

Publication date: 2010-02-01

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