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Seasonal and spatial variability of appendicularian density and taxonomic composition in the Caravelas Estuary (Northeastern Brazil) and adjacent coastal area BABT
Carvalho,Pedro Freitas de; Bonecker,Sérgio Luiz Costa.
This study aimed to identify and assess the seasonal and spatial variations of the appendicularians in the Caravelas River estuary and the adjacent coastal area. Samples were taken during 12 campaigns over five years (2001 and 2003-2006). Ten species were identified; the most abundant were Oikopleura dioica, Oikopleura rufescens, and Oikopleura longicauda. These species represented more than 95% of the total numbers of appendicularians. The remaining species were less frequent and occurred in low densities. The mean density of appendicularians found at the coastal stations (804 ind.m-3.) was higher than in the estuary (66 ind.m-3). However, the differences observed between the estuary and coastal stations were not significant (p=0.54). The samples taken...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Oikopleuridae; Fritillariidae; Tropical estuary; Brazil.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000100020
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A new appendicularian, Oikopleura gorskyi n. sp. (Tunicata), from norwegian fjords Naturalis
Flood, Per R..
A new appendicularian, Oikopleura gorskyi n. sp., recovered from numerous plankton samples taken at depths between 1200 and 400 m in Sognefjorden, western Norway, as well as in more shallow water in this and other western Norwegian fjords, is described. The species is easily identified by the limited extension of its oikoblastic epithelium, the small size of its right stomach lobe and the disposition of its subchordal cells in two segments of an antero-posterior line with some 13 and 8 plateshaped cells respectively. The unique pattern of its house rudiment inclusion body and the unique cell nuclear pattern in its oikoblastic epithelium are additional, although less easily observable, characters of this species.
Tipo: Article / Letter to the editor Palavras-chave: Urochordata; Appendicularia; Oikopleuridae; Oikopleura gorskyi.
Ano: 2000 URL: http://www.repository.naturalis.nl/record/505187
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