Composition and distribution of benthic molluscs on intertidal flats of Paranaguá Bay (Paraná, Brazil)

Authors

  • Guisla Boehs Depto. de Aqüicultura, CCA-UFSC
  • Theresinha Monteiro Absher Centro de Estudos do Mar da UFPR
  • Andrea da Cruz-Kaled Centro de Estudos do Mar da UFPR,

DOI:

https://doi.org/10.3989/scimar.2004.68n4537

Keywords:

Benthic molluscs, species composition, spatial distribution, tidal flats, Anomalocardia brasiliana, Paranaguá Bay, southeastern Brazil

Abstract


Mollusc species composition, abundance and spatial distribution were analysed from April 1996 to October 1997 on two tidal flats in Paranaguá Bay (SE Brazil) at the entrance (St. I) (Lat. 25o3´S) and in the intermediate sector (St. II) (Lat. 25o3´S) of the estuary. At St. I, with the highest and least variable salinity, species richness (R = 40) and diversity (H´= 1; DS = 0.85) were higher than at St. II (R = 22 and H´ = 0.54; DS = 0.57). The tropical clam Anomalocardia brasiliana was the most conspicuous mollusc of the two assemblages, followed by Cerithium atratum, Neritina virginea and Crassostrea sp. at St. I and by Macoma constricta and N. virginea at St. II. On the two flats, the decrease in species richness and abundance towards the upper tidal levels suggests a strong relationship between relative tolerance to physiological stress in the organisms and the degree of immersion/submersion.

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Published

2004-12-30

How to Cite

1.
Boehs G, Monteiro Absher T, da Cruz-Kaled A. Composition and distribution of benthic molluscs on intertidal flats of Paranaguá Bay (Paraná, Brazil). scimar [Internet]. 2004Dec.30 [cited 2021Sep.27];68(4):537-43. Available from: https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/417

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