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  • 1
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract During the BENTART 95 Expedition, 24 Agassiz trawls for macrozoobenthos sampling were carried out at depths of 40–850 m, from north of Livingston Island to the Antarctic Peninsula. The samples were analysed using a semi-quantitative method, and with the resulting numerical data, transformed into a six-point scale, we constructed a Bray-Curtis similarity matrix. A total of 74,624 specimens, belonging to 38 taxonomic groups, were collected. The most abundant group was Polychaeta Sedentaria, with 36% of the total, whereas the highest relative masses were from Ascidiacea (23%), Echinoidea Regularia (18%) and Ophiuroidea (16%). The maximum number of specimens recorded was 15,600 ind./50 l. Cluster analysis separated stations located in Foster Bay (Deception Island), characterised by low taxonomic richness and high relative mass (average: 26.7 kg). A zonation of ascidians, regular sea urchins and ophiuroids was observed at Deception Island, clearly related to depth and substratum type. The remaining stations were separated into two groups. The first one comprised the shallowest stations (40–130 m), dominated by sessile active filter-feeders, belonging to Ascidiacea, Demospongia and Bryozoa, and probably related to high primary production zones. The second group comprised deeper stations and was dominated by classes exhibiting a diversity of trophic strategies: Ophiuroidea and Asteroidea, to 400 m, and Polychaeta Sedentaria at greater depths.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Letters in mathematical physics 28 (1993), S. 115-122 
    ISSN: 1573-0530
    Keywords: 35Q53 ; 35A30
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Abstract We discuss the parametrization of real finite-gap solutions of an integrable equation by frequency and wavenumber vectors. This parametrization underlies perturbation and averaging theories for the finite-gap solutions. Out of the framework of integrable equations, the parametrization gives a convenient coordinate system on the corresponding manifold of Riemann curves.
    Type of Medium: Electronic Resource
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  • 3
    Publication Date: 2013-06-22
    Description: Analytical Chemistry DOI: 10.1021/ac401455f
    Print ISSN: 0003-2700
    Electronic ISSN: 1520-6882
    Topics: Chemistry and Pharmacology
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  • 4
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    Unknown
    In:  Zoologische Mededelingen (00240672) vol.78, 1-16 (2004) p.257
    Publication Date: 2007-01-18
    Description: A fertile specimen of ‘Cladocarpus’ cartieri Bedot, 1921, from the mid-Atlantic ridge is redescribed. The species is referred to the genus Aglaophenopsis of the tribe Cladocarpini of family Aglaopheniidae where it should stand as Aglaophenopsis cartieri (Bedot, 1921).
    Keywords: Mid-Atlantic Ridge ; Leptolida ; Aglaopheniidae ; Aglaophenopsis ; 42.79
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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  • 5
    Publication Date: 2010-12-12
    Description: A new species of the leptolid family Plumulariidae, Nemertesia tropica spec. nov. is described. The various species of Nemertesia are listed and their synonymy and characters discussed. Allocation in Nemertesia of some species previously described in Plumularia by Fraser (1938-1948) necessitated the introduction of two new names, viz. Nemertesia californica nom. nov. for Plumularia mutabilis Fraser, 1948 and Nemertesia mexicana nom. nov. for Plumularia reversa Fraser, 1938.
    Keywords: Cnidaria ; Hydrozoa ; Leptolida ; Leptothecata ; Plumulariidae ; Nemertesia ; Indonesian waters ; 42.79
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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  • 6
    Publication Date: 2024-01-12
    Description: Thirty-one hydroids species, living on the sublittoral soft-bottoms, are reported from the R\xc3\xada de Vigo, representing one third of the species currently known, from the R\xc3\xada. Twenty-four are Leptomedusae and only seven are Anthomedusae. The identifications of Campomma hincksi, Cosmetira pilosella and Laodicea undulata, based only on the hydroid stage, are discussed. The report includes one species that could be identified only to generic level as well, and also a description of the previously unknown male gonotheca of Halecium liouvillei. Five species, Merona cornucopiae, Hydractinia echinata, Lovenella clausa, Opercularella spec, and Laomedea angulata, were collected exclusively from soft bottoms that seem to be their typical habitat. Analysis of geographical distribution shows that the cosmopolitan species are dominant followed by tropical-Atlantic and boreal groups; and Indo-Pacific and endemic species are absent. Concerning life cycles 60% of the species have fixed gonophores. The species with free medusae (40%) dominate only in the cosmopolitan group.
    Keywords: Cnidaria ; Hydrozoa ; Hydroida ; soft-bottom ; R\xc3\xada de Vigo ; NW Spain.
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 7
    Publication Date: 2024-01-12
    Description: Three new species of Alcyonium collected by the Spanish Antarctic Expeditions "Ant\xc3\xa1rtida 8611" and "Bentart 95" are described and figured: Alcyonium paucilobulatum, A. grandis and A. southgeorgiensis.\nAnother two species, A. antarcticum Wright & Studer, 1889, and Alcyonium sollasi Wright & Studer, 1889, were also collected in the same area.
    Keywords: Anthozoa ; Octocorallia ; Alcyonium ; new species ; Antarctica
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 8
    Publication Date: 2024-01-12
    Description: Forty-six species of the superfamily Plumularioidea (Hydrozoa, Cnidaria) and some material identified to the generic level, collected by the CANCAP and Mauritania-II expeditions of the Rijkmuseum van Natuurlijke Historie (now Nationaal Natuurhistorisch Museum) in the period 1976-1988, are described, as well as two other species that were used in the present study. In addition to the descriptions, synonymy, variability and geographical distribution are discussed; autoecological data and measurements are also presented. The new species described here are: Aglaophenia svobodai spec. nov., Streptocaulus caboverdensis spec. nov., S. chonae spec. nov., Antennella confusa spec. nov. and Nemertesia anonyma spec. nov. All species are figured. The general classification used follows Bouillon (1985, 1995); nomenclature on the species level is as used by Svoboda & Cornelius (1991), Ramil & Vervoort (1992a, 1992b), Calder (1997) and Schuchert (1997). The material originates from the seas and coasts around the Azores, Madeira, Selvagens, Canary Islands and Cape Verde Islands, as well as the Atlantic off Morocco and Mauritania, at depths varying between 0 and 4000 m. All species discussed have a wider, usually Atlantic distribution, with the exception of Streptocaulus pulcherrimus Allman, 1883, endemic in the Cape Verde area and Nemertesia belini Bedot, 1916, known only from the Azores and Cape Verde Islands.
    Keywords: Cnidaria ; Hydrozoa ; Leptolida ; Aglaopheniidae ; Halopterididae ; Kirchenpaueriidae ; Plumulariidae ; north-eastern Atlantic ; geographical distribution
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 9
    Publication Date: 2024-01-12
    Description: A fertile specimen of \xe2\x80\x98Cladocarpus\xe2\x80\x99 cartieri Bedot, 1921, from the mid-Atlantic ridge is redescribed. The species is referred to the genus Aglaophenopsis of the tribe Cladocarpini of family Aglaopheniidae where it should stand as Aglaophenopsis cartieri (Bedot, 1921).
    Keywords: Mid-Atlantic Ridge ; Leptolida ; Aglaopheniidae ; Aglaophenopsis
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 10
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    Unknown
    In:  Zoologische Mededelingen vol. 66 no. 36, pp. 485-492
    Publication Date: 2024-01-12
    Description: Description of a new genus of Hydroida (Hydrozoa, Cnidaria) from Atlantic seamounts in the eastern subtropical Atlantic (area between Cape S\xc3\xa3o Vicente, Portugal, and Madeira). Description of the type of the genus and allocation to the new genus of a second species hitherto brought to Plumularia Lamarck, 1816.
    Keywords: Cnidaria ; Hydrozoa ; Hydroida ; Pseudoplumaria gen. nov. ; Pseudoplumaria sabinae spec. nov. ; Atlantic seamounts
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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