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Nematodes from sandy beaches of Guanabara Bay, Rio de Janeiro, Brazil
Maria, T.F.; Esteves, A.M.; Smol, N.; Vanreusel, A.; Decraemer, W. (2008). Nematodes from sandy beaches of Guanabara Bay, Rio de Janeiro, Brazil. Biociências 16(2): 92-103
In: Biociências. Pontificia Universidade Católica do Rio Grande do Sul, Instituto de Biociências: Porto Alegre, RS. ISSN 0104-3455; e-ISSN 2317-6245
Peer reviewed article  

Available in  Authors 

Keywords
    Sandy beaches
    Nematoda [WoRMS]
    ASW, Brazil, Rio de Janeiro, Guanabara Bay [Marine Regions]
    Marine/Coastal

Authors  Top 
  • Maria, T.F.
  • Esteves, A.M.
  • Smol, N.
  • Vanreusel, A., more
  • Decraemer, W.

Abstract
    This work assessed the nematode composition in three sandy beaches located at Guanabara Bay, Rio de Janeiro, Brazil (22°24’ and 22°57’S; 42°33’ and 43°19’W). These microtidal, sheltered sandy beaches (Bica, Bananal and Coqueiros) were surveyed on January and June 2001, during the low tide. Samples were taken using a PVC core of 10cm2. Nematodes were extracted using the sugar-flotation methodology. The sediment of these beaches was mainly composed of sand and showed a variation between medium to very coarse sediments. In total 6312 specimens were identified up to the genus level or when possible to species level. At the three beaches, 62 genera were found, belonging to 25 families and distributed along of 8 orders. Chromadoridae was the most abundant family in terms of genera. All the families found have also been recorded from previously studied beaches. Amongst the genera found, four of them (Deontolaimus, Dracograllus, Phanodermella and Subsphaerolaimus) were for the first time recorded for Brazilian’s coastline. The number of genera occurring on the Guanabara beaches (31 for Bica, 39 for Bananal and 46 for Coqueiros) is more or less similar to another Brazilian sandy beach whereas these values showed higher variation concerning worldwide tropical and non-tropical beaches. The first occurrence of four genera for the Brazilian coastline suggest the possibility to discover new species in this bay, therefore to the need for further development of nematode taxonomy in Brazil.

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