Produção Nacional
Pteropoda (Gastropoda, Thecosomata e Gymnosomata) coligidos ao largo dos arquipélagos de São Pedro e São Paulo, costa nordeste, Brasil
2002; Sociedade Brasileira de Zoologia; Volume: 19; Issue: suppl 1 Linguagem: Inglês
10.1590/s0101-81752002000500016
ISSN1806-969X
AutoresValdeni Soares de Oliveira, Maria Eduarda Lacerda de Larrazábal,
Tópico(s)Marine Bivalve and Aquaculture Studies
ResumoPteropoda (Gastropoda, Thecosomata and Gymnosomata) collected along the northeast coast of the archipelago of São Pedro and São Paulo, Brazil.Pteropoda studies were carried out offshore São Pedro and São Paulo Archipelago (0056'2"N e 29OZ0'6"W) to assess biodiversity and spatial distribution.A Bongo net (mesh size 300 micrometer) was hauled obliquely from a depth between O and 50 m and O and 100 m by the REVIZEE-SCOREINE I oceanographic expedition on board of the Brazilian Navy Oceanographic Ship Antares.Samples were collected at 16 stations from Septemberto October 1995.A total of880 organisms distributed in 20 species, 14 genera and 9 families were identified.At the layer O-50 m, Creseis virgula (Rang 1828) was the most frequent species (71.43%), followed by Lil1lacina infla/a (Orbigny , 1836) and Cavolinia inflexa (Lesueur, 1813) (64.28%, each).lnterms ofrelative abundance outranked L. inflara (varying between 57.5 and 92.24%) and C. virgula (varying between 60.0 and 72.73%).At the layerO-lOO m, C. virgula was very frequent (80%), L. infla/a (70%) and Cuvierilla colul1lnella (Rang 1827) (40%) were frequent, other species had less than 30% of frequency.L. infla/a varied from 37.5 to 100% and C. virgula from 42.42 to 100% of relative abundance.Species diversity varied from medium to low « 2.0 bits.indo !) in both layers.At the layer O-50 m C. virgula was directIy correlated to temperature and salinity, while at the layer O-I 00 m L. inflara was correlated to these parameters, showing that these species are Tropical Water indicators.
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