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Seasonal changes in density, biomass, and diversity of estuarine fishes in tidal mangrove creeks of the lower Caeté Estuary (northern Brazilian coast, east Amazon)

2003; Inter-Research; Volume: 256; Linguagem: Inglês

10.3354/meps256217

1616-1599

M. Barletta, Audrey Barletta-Bergan, Ulrich Saint‐Paul, Gerd Hubold,

Coral and Marine Ecosystems Studies

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 256:217-228 (2003) - doi:10.3354/meps256217 Seasonal changes in density, biomass, and diversity of estuarine fishes in tidal mangrove creeks of the lower Caeté Estuary (northern Brazilian coast, east Amazon) Mário Barletta1,2,*, Audrey Barletta-Bergan2, Ulrich Saint-Paul2, Gerd Hubold3 1Departamento de Oceanografia, UFPE, Cidade Universitária, 50740-550, Recife, Pernambuco, Brazil 2Center for Tropical Marine Ecology, Fahrenheitstrasse 6, 28359 Bremen, Germany 3Bundesforschungsanstalt für Fischerei, Palmaille 9, 22767 Hamburg, Germany *Email: barletta@ufpe.br ABSTRACT: The present study investigated the assemblage of fish species in an intertidal mangrove forest during high tide in a macrotide region. We describe the seasonal changes in the fish assemblage composition in relation to biomass, density, and species number in tidal creeks of the Furo do Meio, Caeté Estuary, Brazil. A total of 29107 individuals of 49 species in 26 families were caught using a block net. Their total weight was 526 kg (total density 0.11 ind. m-2 and total biomass 2.1 g m-2). Analysis of the catch data showed that the number of species varied significantly between creeks, and that total fish biomass differed significantly between seasons. The densities and biomass of the 2 most important species, Cathorops pleurops and Colomesus psittacus, were significantly different between seasons. The densities and biomass of C. pleurops, Pterengraulis atherinoides, Pseudauchnipterus nodosus, and Stellifer naso showed significant temporal differences. Significant differences between creeks were observed in the density and biomass of Anchovia clupeoides and Rhinosardinia amazonica. The abundance-biomass comparison (ABC) plots for the fish fauna in the creeks of the Furo do Meio showed that the dominant species increased in number and weight at the beginning of the rainy season. As a result of increased rainfall in March and April, salinity declined to values between 6 and 8 psu. At that time, the dominant species made up more than 60% of the total biomass and density and Hill¹s index of diversity (N1) declined, whereas the number of species (N0) and evenness (E2) did not change. After April, rainfall decreased, and density and biomass returned to levels similar to those before the rainy season. The number of species and the density and biomass in the mangrove tidal creeks are compared with published data for other tropical and subtropical estuaries. Migration trends were inferred from the results of the seasonal fluctuations of density and biomass of the most important species in the Furo do Meio, and are compared with data from other studies in the main channel of the Caeté Estuary. KEY WORDS: Estuarine fishes · Caeté Estuary · Eastern Amazon · Mangrove tidal creeks · Macrotide region · Fish assemblages Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 256. Online publication date: July 17, 2003 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2003 Inter-Research.