Diversity of decapod crustaceans at the interface of unconsolidated seabed areas and rocky shores in tropical/subtropical Brazil

  • A Fransozo
  • M Furlan
  • V Fransozo
  • G Bertini
  • RC da Costa
  • LC Fernandes-Góes

Abstract

The decapod crustacean assemblages from unconsolidated seabed areas located near rocky shores in the Ubatuba region on the south-east coast of Brazil were analysed by investigating the abundance, richness, diversity and dominance of species. The relationships of the sediment and bottom-water temperature to total species abundance, richness and diversity were also evaluated. Monthly samples were taken from January 1998 through December 1999 at sites in Ubatumirim and Mar Virado. At each locality, three areas were defined as either ‘exposed’, ‘sheltered’ or ‘island’. The highest species abundance was found in the sheltered area of Ubatumirim and the exposed area of Mar Virado, and during autumn. At Ubatumirim, the highest richness occurred in the exposed area and the highest diversity near the island. At Mar Virado, the highest richness and diversity were found near the island. Autumn and winter collections yielded the highest richness but the lowest diversity. The higher diversities, which were measured near the islands and during spring and summer, were consequences of the greater evenness of the data. The areas with the highest diversity also had the most heterogeneous sediment composition, thus reinforcing the hypothesis that areas with more complex substrata support more diverse faunas.

Keywords: abundance, biodiversity, Decapoda, richness, substratum

African Journal of Marine Science 2012, 34(3): 361–371

Author Biographies

A Fransozo
Departamento de Zoologia, Instituto de Biociências, Universidade Estadual Paulista (UNESP), Distrito de Rubião Junior, s/n, Botucatu, São Paulo, 18618-000, Brazil
M Furlan
Departamento de Zoologia, Instituto de Biociências, Universidade Estadual Paulista (UNESP), Distrito de Rubião Junior, s/n, Botucatu, São Paulo, 18618-000, Brazil
V Fransozo
Instituto Federal de Educação, Ciência e Tecnologia Baiano, Campus Santa Inês, Km 2,5 da BR 420, Santa Inês, Bahia, 45320-000, Brazil
G Bertini
Universidade Estadual Paulista (UNESP), Unidade de Registro, Rua Nelson Brihi Badur, 430, Registro, São Paulo, 11900-000, Brazil
RC da Costa
Departamento de Ciências Biológicas, Faculdade de Ciências, Universidade Estadual Paulista (UNESP), Avenida Luiz Edmundo Carrijo Coube, 14-01, Bauru, São Paulo, 17033-360, Brazil
LC Fernandes-Góes
Universidade Estadual do Piauí (UESPI), Avenida Nossa Senhora de Fátima, s/n, Parnaíba, Piauí, 64202-220, Brazil
Section
Articles

Journal Identifiers


eISSN: 1814-2338
print ISSN: 1814-232X