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Showing 1 to 20 of 31 for “"Polychaeta"”.
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Análise filogenética de espécies selecionadas do gênero Eunice (Eunicidae, Polychaeta)
Most specimens examined in previous studies of the genus Eunice have been incomplete. This lead problems in the taxonomy of the genus, large amount of missing characters in cladistic analyses and inconclusive results. ln this study, complete specimens of 23 species of Eunice were examined and a …
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Interactive processes in a Lanice conchilega (Annelida: Polychaeta) dominated intertidal community
An investigation was conducted into the factors influencing a soft-sediment intertidal benthic community dominated by the large tube building polychaete Lanice conchilega (Pallas, 1766). The environmental and biological characteristics of a mid-shore sampling site on a relatively sheltered sandflat …
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Isolierung und Identifizierung von Sexualpheromonen des marinen Polychaeten Platynereis dumerilii (Annelida, Polychaeta)
Das Ziel der vorliegenden Arbeit war die Identifizierung des Egg Release Pheromons (ERP) und des Mate Recognition Pheromons (MRP) beim marinen Polychaeten Platynereis dumerilii. Die Isolierung des ERP wurde durch biotestorientierte Fraktionierung männlicher Coelomflüssigkeit mit RP-HPLC erreicht. …
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Reproductive ecology of Vestimentifera (Polychaeta: Siboglinidae) from hydrothermal vents and cold seeps
Giant siboglinid tubeworms (formerly Vestimentifera) are ecologically important members of deep-sea chemosynthetic communities, including hydrothermal vents and cold seeps. Species of siboglinids are community dominants, primary colonists of new vent sites, and the longest living and fastest …
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Studies on the reproduction and larval biology of Polydora Giardi Mesnil (Polychaeta: Spionidae)
There are no published accounts of larval development for P. giardi, although Mesnil (1896) determined his populations to be simultaneous hermaphrodites. The present paper describes aspects of the reproductive biology and larval development of P. girardi and presents descriptions and illustrations …
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Sediment-associated cues for larval settlement of Polydora cornuta and Streblospio benedicti (Polychaeta, Spionidae)
Patchy distribution of infaunal polychaetes may result from active site selection of larvae guided by sediment associated bacterial cues. This hypothesis was tested in still water laboratory settlement assays with and without choice option for larvae of two spionid polychaetes with indirect …
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Isolierung und Identifizierung von Pheromonen und mit Pheromonen interferierenden Substanzen bei Platynereis dumerilii (Annelida, Polychaeta)
Ziel war die Isolierung und Identifizierung von Spermaabgabe induzierenden Verbindungen aus EKO-FISK-Rohöl sowie die Isolierung von Sexualpheromonen bei der Polychaetenart Platynereis dumerilii. Aromatenhaltige Fraktionen aus dem Rohöl konnten bei schwärmenden Männchen eine Spermaabgabe induzieren. …
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The ecology and reproductive cycle of Pygospio elegans claparède (Polychaeta: spionidae) from Tomales Bay, California
<p>Pygospio elegans Claparede (1863) is a relatively small, inconspicuous intertidal Spionid polychaete (10 to 15 mm in length) having approximately 50 to 60 body segments. The species occurs in high intertidal sand flats along the central California coast.</p><p>Pygospio elegans is one of three …
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Aglaophamus ornatus Hartman, 1967 (Polychaeta-Nephtyidae) da plataforma continental das Ilhas Kerguelen-região sub Antártica
… population of Aglaophamus ornatus Hartman, 1967, Polychaeta Nephtyidae. The systematic problems presented by a certain number of species and the distribution of the species of the genus Aglaophamus are brought up and discussed as well as the dominance and the density of the different zoological …
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Composição da fauna bêntica rasa em duas estações (12 e 25 metros de profundidade) ao longo de um ciclo anual na Baía do Almirantado, Ilha Rei George, Antártica
The megafauna, macrofauna and Polychaeta communities at 12 and 25 meters depth in Admiralty Bay (King George Island, Antarctica) were studied along the Antarctic winter (March to December 1999) and summer (December 2000 to March 2001 ), through an entire seazonal cycle. Samplings were carried out …
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Distribuição especial dos Annelida - Polychaeta em substratos não consolidados do Saco do Céu - Ilha Grande - Angra dos Reis - RJ
… determine the spatial distribution of Annelida Polychaeta in Saco do Céu - Ilha Grande - Angra dos Reis - Rio de Janeiro, an inlet facing the continent. Thirty-nine stations were done in two different periods of the year (January and July/1992). A 0,1 m2 Petersen grab was used to collect the …
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Distribuição espaço-temporal de Scolelepsis cf. squamata (Muller, 1808) (Polychaeta: Spionidae) como ferramenta para estudos da dinâmica sedimentar costeira
A population of the spionid polychaete Scolelepis cf. squamata was studied on Dois Rios beach, an embayed oceanic beach located at Ilha Grande (a coastal island), at the southeastern Brazilian coast. The relationship between beach morphodynamics and the spatial-temporal distribution of this species …
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Sistema planctônico da região do emissário submarino de esgotos de Ipanema, Rio de Janeiro, RJ, populações zooplanctônicas: Annelida Polychaeta
… qualitative study was directed to the Annelida Polychaeta out of the zooplankton collected in that area. Six species, distributed into three families, Iospilidae (3), Typhloscolecidae (2) and Tomopteridae (1); are studied with descriptions and illustrations of those species, which are …
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Do microbial or biochemical settlement cues on the sediment surface mediate larval settlement of Polydora cornuta and Streblospio benedicti (Polychaeta, Spionidae)?
Distinctive, patchy abundance patterns of spionid polychaetes i.e. Polydora cornuta and Streblospio benedicti with indirect larval development were found in sediments of tidal flats in the German Wadden Sea. These patterns were not explicable through grain size or other sediment parameters. This …
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Red Sea Polychaetes from the Gulf of Elat (Aqaba) : a contribution to the knowledge of the Polychaeta fauna and the environmental conditions which affects its distribution
A study of 50 samples of Polychaeta mainly from a northern profile (0.5 - 550 m) and down to 800 m, reveals that the fauna is characterised by extremely small specimens and a great taxonomic divergence. Techniques of handling minute specimens are described, together with 21 new species, including …
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Mitochondrial genomics and northwestern Atlantic population genetics of marine annelids
… proposed by others, synonomizes "Annelida" and "Polychaeta", and lends further support to the inclusion of echiurids, siboglinids (previously called vestimentiferans) within annelids, and sipunculans as close allies. The complete mt-genome of C. torquata was then rapidly screened to obtain …
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Identification et distribution spatio-temporelle des épibiontes retrouvés sur l'exosquelette du crabe des neiges (chionoecetes opilio) dans le sud du Golfe du Saint-Laurent et sur le Plateau Néo-écossais
… de l'occurrence). Les familles des Spirorbidae (Polychaeta) et des Alcyonididae (Bryozoa) ont été trouvées dans chaque région étudiée, la famille des Hippothoidae (Bryozoa) a été observée principalement chez le SGSL et la famille des Balanidae (Cirripedia) dans le SS. Les résultats ont montré que …
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Mitochondrial genomics and Northwestern Atlantic population genetics of marine annelids
… proposed by others, synonomizes "Annelida" and "Polychaeta", and lends further support to the inclusion of echiurids, siboglinids (previously called vestimentiferans) within annelids, and sipunculans as close allies. The complete mt-genome of C. torquata was then rapidly screened to obtain …
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The Gammaridean and Caprellid Amphipoda of Southern Africa
… is paralleled in other groups such as the polychaeta. It is concluded that although southern Africa is rich in endemic species and genera it is not a centre for the evolution of major taxa but rather an evolutionary outpost where immigrant forms have evolved under reduced pressure.
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The influence of sampling method on detecting benthic biodiversity patterns at the ecoregion scale on the South African west coast
… by Asteroidea, Decapoda and Gastropoda, whereas Polychaeta, Amphipoda and Bivalvia dominated infaunal communities. BTA found trawl samples to be dominated by epifauna exhibiting large sizes, dorso-ventrally flattened body forms, free-living and surface-crawling life habits, moderate mobility, …
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