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Registros recuperados: 28
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Amathillopsis charlottae n. sp., first record of Amathillopsidae (Crustacea, Amphipoda) from the Antarctic Ocean Naturalis
Coleman, Charles Oliver.
Amathillopsis charlottae n. sp. from the Antarctic Ocean is described herein, the first record of the Amathillopsidae from this region. The new taxon differs from all other known species of this family by the combination of: long carina on pleonite 3, urosomite 1 without carina, accessory flagellum of antenna 1 uniarticulate, mandibular palp article 2 only weakly shorter than 3 and telson entire. The genus Cleonardopsis, formerly classified as Eusiridae, is transfered into Amathillopsidae.
Tipo: Article / Letter to the editor Palavras-chave: Crustacea; Amphipoda; Amathillopsis charlottae n. sp.; Antarctic.
Ano: 1998 URL: http://www.repository.naturalis.nl/record/505339
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Ecophysiology of Antarctic macroalgae: effects of environmental light conditions on photosynthetic metabolism RChHN
GÓMEZ,I..
Daylength is the major environmental factor affecting the seasonal photosynthetic performance of Antarctic macroalgae. For example, the "season anticipation" strategy of large brown algae such as Ascoseira mirabilis and Desmarestia menziesii are based on the ability of their photosynthetic apparatus to make use of the available irradiance at increasing daylengths in late winter-spring. The seasonal development and allocation of biomass along the lamina of A. mirabilis are related to a differential physiological activity in the plant. Thus, intra-thallus differentiation in O2-based photosynthesis and carbon fixation represents a morpho-functional adaptation that optimizes conversion of radiant energy to primary productivity. In Desmarestia menziesii,...
Tipo: Journal article Palavras-chave: Polar macroalgae; Antarctic; Photosynthesis; Daylength.
Ano: 2001 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2001000200004
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Elements for a revision and notes on bionomy of the Cumacea (Crustacea: Peracarida) of the Weddell Sea (Antarctica). : Material collected by the Expedition ANTARKTIS-VIII/5 of R.V. “Polarstern” 1989/90 Naturalis
Petrescu, I.; Wittmann, K.J..
Among 26 species of Antarctic Cumacea sampled during the southern summer 1989/90 from benthic habitats in the Weddell Sea, four are described as new to science: Campylaspis ledoyeri spec. nov., Hemilamprops bacescui spec. nov., Paralamprops racovitzai spec. nov., and Leptostylis weddelli spec. nov. Detailed descriptions are given for the previously unknown or undescribed sex in seven species: Cyclaspis gigas Zimmer, 1907, Procampylaspis compressa Zimmer, 1907, Paralamprops asper Zimmer, 1907, P. mawsoni (Hale, 1937), Diastylis anderssoni armata Ledoyer, 1993, D. mawsoni Calman, 1918, and Leptostylis antipus Zimmer, 1907. Previous descriptions are supplemented by additional morphological data on 14 species: Cyclaspis gigas, Vaunthompsonia inermis Zimmer,...
Tipo: Article / Letter to the editor Palavras-chave: Crustacea; Cumacea; Taxonomy; New species; Morphology; Bionomy; Antarctic; Marine benthos; 42.74.
Ano: 2003 URL: http://www.repository.naturalis.nl/record/216173
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Epimeria heldi, a new species of Amphipoda (Crustacea, Epimeriidae) from the Antarctic Ocean Naturalis
Coleman, Charles Oliver.
The new amphipod species Epimeria heldi is described. It differs from all known eperimiids in the following combination of characters: apically rounded coxae 1-3, the characteristic sculptured coxal plate 4, the narrow basis 7 and uropod 3 rami apically rounded. The body colour of the living animal is grey, with dark red mouthparts and appendages, and yellow eyes.
Tipo: Article / Letter to the editor Palavras-chave: Crustacea; Amphipoda; Antarctic; Epimeria heldi n. sp.
Ano: 1998 URL: http://www.repository.naturalis.nl/record/504687
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Expédition OceanoScientific 2016-2017 : Etudes des mesures de température et de salinité de surface ArchiMer
Reynaud, Thierry; Reverdin, Gilles; Metzl, Nicolas; Griboval, Yvan.
The OceanoScientific Programm was initiated in 2006 and yielded the creation of a specific equipment : the OSC-System. The OSC-System measures physical parameters at the air-sea interface including Sea Surface temperature and Salinity. An OSC-System was installed on board of the OceanoScientific Explorer Boogaloo sailing ship. A cruise around the world was initiated the 17/11/2016 and ended 02/06/2017 including 60 days south of 40°S. Sea Surface temperature and salinity collected along this cruise are discussed in this technical report.
Tipo: Text Palavras-chave: Mesures; Température; Salinité; Surface; Oceanoscientific; Boogaloo; Antarctique; Temperature; Salinity; SST; SSS; Measurements; Antarctic.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00472/58356/60914.pdf
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Influence of snow depth and surface flooding on light transmission through Antarctic pack ice ArchiMer
Arndt, Stefanie; Meiners, Klaus M.; Ricker, Robert; Krumpen, Thomas; Katlein, Christian; Nicolaus, Marcel.
Snow on sea ice alters the properties of the underlying ice cover as well as associated physical and biological processes at the interfaces between atmosphere, sea ice, and ocean. The Antarctic snow cover persists during most of the year and contributes significantly to the sea-ice mass due to the widespread surface flooding and related snow-ice formation. Snow also enhances the sea-ice surface reflectivity of incoming shortwave radiation and determines therefore the amount of light being reflected, absorbed, and transmitted to the upper ocean. Here, we present results of a case study of spectral solar radiation measurements under Antarctic pack ice with an instrumented Remotely Operated Vehicle in the Weddell Sea in 2013. In order to identify the key...
Tipo: Text Palavras-chave: Light transmittance; Sea ice; Antarctic; Surface flooding; Snow; Shortwave radiation.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00386/49758/50279.pdf
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Marine photosynthetic eukaryotes in polar systems: Unveiling phytoplankton diversity and composition in Antarctic waters RChHN
DE LA IGLESIA,RODRIGO; TREFAULT,NICOLE.
Antarctic waters are a particular marine environment mainly due to the strong seasonal variations that various parameters are subject to, like light availability and temperature. As in all oceanographic regions, food webs are sustained by photosynthetic microorganisms, which in the case of Antarctic environments seem to be strongly dominated by its eukaryote component. Assessing the ecological role of photosynthetic microbial eukaryotes requires a basic knowledge of their diversity and community composition. This review integrates the available information regarding this component of Antarctic phytoplankton as a way to unveil its diversity and how they respond to the strong changes that occur in this environment. Although several studies indicate the...
Tipo: Journal article Palavras-chave: Antarctic; Biodiversity; Photosynthetic eukaryotes; Phytoplankton; Antártica; Biodiversidad; Eucariontes fotosintéticos; Fitoplancton.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000400006
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Modeling Distribution and Abundance of Antarctic Baleen Whales Using Ships of Opportunity Ecology and Society
Williams, Rob; Sea Mammal Research Unit; rmcw@st-andrews.ac.uk; Hedley, Sharon L.; University of St. Andrews; slc@st-andrews.ac.uk; Hammond, Philip S.; University of St. Andrews; psh2@st-andrews.ac.uk.
Information on animal abundance and distribution is at the cornerstone of many wildlife and conservation strategies. However, these data can be difficult and costly to obtain for cetacean species. The expense of sufficient ship time to conduct design-unbiased line transect surveys may be simply out of reach for researchers in many countries, which nonetheless grapple with problems of conservation of endangered species, by-catch of small cetaceans in commercial fisheries, and progression toward ecosystem-based fisheries management. Recently developed spatial modeling techniques show promise for estimating wildlife abundance using non-randomized surveys, but have yet to receive much field-testing in areas where designed surveys have also been conducted....
Tipo: Peer-Reviewed Reports Palavras-chave: Abundance; Antarctic; Baleen whale; Cetacean; Distance sampling; Distribution; Line transect; Platform of opportunity; Spatial model.
Ano: 2006
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On Clathrozoellidae (Cnidaria, Hydrozoa, Anthoathecatae), a new family of rare deep-water leptolids, with the description of three new species Naturalis
Peña Cantero, A.L.; Vervoort, W.; Watson, E.J..
Three new species of Anthoathecatae (Cnidaria, Hydrozoa) of the rare genus Clathrozoella Stechow, 1921, Clathrozoella abyssalis spec. nov., C. bathyalis spec. nov. and C. medeae spec. nov., are described from New Zealand and Antarctic waters. Along with the previously known C. drygalskii (Vanhöffen, 1910) the genus Clathrozoella now numbers four species. Details of the skeleton, hydranths, nematocysts and gonophores are described and discussed, as is also the position of the newly established family Clathrozoellidae.
Tipo: Article / Letter to the editor Palavras-chave: Hydrozoa; Anthoathecatae; Clathrozoellidae; Clathrozoella; Antarctic; Benthos; New species; 42.79.
Ano: 2003 URL: http://www.repository.naturalis.nl/record/220315
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On Oswaldella billardi Briggs, 1938 and O. erratum spec, nov., two antarctic hydroid species (Cnidaria, Hydrozoa) Naturalis
Peña Cantero, A.L.; Vervoort, W..
The type material of Oswaldella billardi Briggs, 1938, has been re-examined and a complete description and figures are presented. The study of that material has allowed to reconsider the systematic position of all the material previously assigned to O. billardi and to determine that part of it belongs to another species. Since it is clearly different from the remaining species of the genus, it is described as Oswaldella erratum spec. nov. Resumen: Se ha revisado y redescrito el material tipo de Oswaldella billardi Briggs, 1938. Su estudio ha permitido reconsiderar la posición sistemática de todo el material anteriormente asignado a O. billardi y, así, determinar que parte del mismo pertenece a otra especie. Ya que dicha especie es claramente diferente de...
Tipo: Article / Letter to the editor Palavras-chave: Cnidaria; Hydrozoa; Hydroids; Oswaldella; New species; Antarctic; 42.72.
Ano: 1997 URL: http://www.repository.naturalis.nl/record/318245
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On two Antarctic species of Oswaldella Stechow, 1919: O. shetlandica Stepan'yants, 1979 and O. elongata spec. nov. (Cnidaria Hydrozoa) (Notes on Antarctic hydroids, II) Naturalis
Peña Cantero, A.L.; García Carrascosa, A.M.; Vervoort, W..
Two species of the antarctic hydroid genus Oswaldella Stechow, 1919, are considered. The first, described by Stepan'yants (1979) as a subspecies, O. billardi shetlandica, has been raised to specific level and will henceforth be indicated as Oswaldella shetlandica Stepan'yants, 1979. A second species is described as Oswaldella elongata spec. nov. Both species are differentiated against the remaining known species of Oswaldella; new records are added and the geographical distribution is discussed. Resumen: Se considera la posición sistemática de dos especies del género Oswaldella Stechow, 1919. Una de ellas, descrita por Stepan'yants (1979) como una subespecie de Oswaldella billardi Briggs, 1938, es elevada al nivel específico y pasa a denominarse Oswaldella...
Tipo: Article / Letter to the editor Palavras-chave: Cnidaria; Hydrozoa; Hydroids; Antarctic; New records; New species; 42.72.
Ano: 1995 URL: http://www.repository.naturalis.nl/record/318391
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On two new species of Oswaldella Stechow, 1919: O. terranovae spec. nov. and O. tottoni spec. nov. (Cnidaria: Hydrozoa). Notes on Antarctic hydroids, III Naturalis
Peña Cantero, A.L.; Vervoort, W..
The material assigned by Totton (1930) to Oswaldella antarctica (Jaderholm, 1904) and O. bifurca (Hartlaub, 1904) has been re-examined and redescribed. This material shows such important differences with Hartlaub's and Jäderholm's species and the remaining species of Oswaldella that they are here considered as two new species: O. terranovae spec. nov. and O. tottoni spec, nov., respectively.
Tipo: Article / Letter to the editor Palavras-chave: Cnidaria; Hydrozoa; Hydroids; Oswaldella; New species; Antarctic; 42.72.
Ano: 1996 URL: http://www.repository.naturalis.nl/record/319412
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Redescription of Echinomunna horrida Vanhöffen, 1914, a highly derived and rare species from the Antarctic (Crustacea, Isopoda, Munnidae) Naturalis
Brandt, Angelika.
During an expedition with RV Polarstern (1998) a male specimen of Echinomunna horrida was collected in the supranet of an epibenthic sledge in the Weddell Sea, Antarctica. Due to an incomplete and poor description by Vanhöffen (1914) a redescription is necessary on the basis of the male from the Weddell Sea and the female syntypes from the East Antarctic.
Tipo: Article / Letter to the editor Palavras-chave: Crustacea; Isopoda; Munnidae; Taxonomy; Weddell Sea; Antarctic.
Ano: 1999 URL: http://www.repository.naturalis.nl/record/505320
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Redescription of Oswaldella antarctica (Jäderholm, 1904) (Cnidaria Hydrozoa) with notes on related species (Notes on Antarctic hydroids, I) Naturalis
Peña Cantero, A.L.; Vervoort, W..
Jäderholm's type of Schizotricha antarctica, collected by the Swedish Antarctic Expedition 1901-1903, is redescribed from a syntype in the collections of the Swedish National Museum, Stockholm. The type lot of that species proved to be composite, the material best resembling Jäderholm's (1904, 1905) descriptions and figures has been designated as the syntype. There are two more species in the type lot, that have also been described, but are too poorly represented to be either recognized as one of the described species of Oswaldella or to merit a new specific name; they have been indicated as Oswaldella spec. 1 and spec. 2. Resumen: Se ha revisado y redescrito el material tipo de Schizotricha antarctica Jäderholm, 1904, recogido durante la Swedish Antarctic...
Tipo: Article / Letter to the editor Palavras-chave: Cnidaria; Hydrozoa; Hydroids; Antarctic; Redescription of Oswaldella antarctica; New species; 42.72.
Ano: 1995 URL: http://www.repository.naturalis.nl/record/318099
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Redescription of Schizotricha anderssoni Jaderholm, 1904 (Cnidaria: Hydrozoa) with the description of a new species. Notes on antarctic hydroids, 4 Naturalis
Peña Cantero, A.L.; Vervoort, W..
The type series of Schizotricha anderssoni Jäderhoim, 1904, collected by the Swedish Antarctic Expedition 1901-1903 and deposited in the collections of the Swedisch National Museum, Stockholm, is redescribed. The type series is composed of two species, the species figured by Jäderhoim (1905) is designated the lectotype of Schizotricha anderssoni. The second species, differing from the other species of the genus, is described as Schizotricha jaederholmi spec. nov.
Tipo: Article / Letter to the editor Palavras-chave: Cnidaria; Hydrozoa; Hydroids; Schizotricha; New species; Antarctic; 42.72.
Ano: 1996 URL: http://www.repository.naturalis.nl/record/318644
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Species of Schizotricha Allman, 1883 (Cnidaria, Hydrozoa) from recent antarctic expeditions with R.V. 'Polarstern', with the description of a new species Naturalis
Peña Cantero, A.L.; Svoboda, A.; Vervoort, W..
Five species of the genus Schizotricha Allman, 1883, one of which is new to science, have been studied. The material originates from the Weddell Sea region and from off Elephant Island and it was collected during several antarctic expeditions with the R.V. Tolarstern'. Each species is described and figured and its systematic position among allied species discussed. The type material of Schizotricha glacialis (Hickson & Gravely, 1907) and S. turqueti Billard, 1906 has been re-examined and is also described and figured.
Tipo: Article / Letter to the editor Palavras-chave: Cnidaria; Hydrozoa; Hydroids; Schizotricha; Antarctic; Re-description of species; New records; New species; 42.72.
Ano: 1996 URL: http://www.repository.naturalis.nl/record/318738
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The Polar Record Number 1 ArchiMer
Tipo: Text Palavras-chave: Antarctic; Arctic.
Ano: 1931 URL: http://archimer.ifremer.fr/doc/1931/publication-6911.pdf
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The Polar Record Number 10 ArchiMer
Tipo: Text Palavras-chave: Greenland; Antarctic; Arctic.
Ano: 1935 URL: http://archimer.ifremer.fr/doc/1935/publication-6914.pdf
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The Polar Record Number 12 ArchiMer
The ice-breaker Malyguin left Archangel on July 6, 1935, to investigate the shipping route from Cape Zhelaniya, the most northerly point of Novaya Zemlya, to Vilkitsky Strait; and from Dickson Island to Vilkitsky Strait. The work was begun off Cape Zhelaniya, whence a section was made to Einsamkeit (Lonely) Island, and two further sections in a blank space on the map to the east. [NOT CONTROLLED OCR]
Tipo: Text Palavras-chave: Expedition; Greenland; Antarctic; Arctic.
Ano: 1936 URL: http://archimer.ifremer.fr/doc/1936/publication-7339.pdf
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The Polar Record Number 17 ArchiMer
A preliminary account of the Cambridge expedition which was at work during the summer of 1938 in West Spitsbergen , under the leadership of L. H. McCabe, was given in The Polar Record, No. 16. The object of the expedition was to carry out geomorphological work in continuation of W. V. Lewis's investigations in cirque development in Iceland in 1937. Six weeks were spent in the Campbell Range on the east side of Billefjorden, Klaas Billen Bay. One party then visited the Stubendorff Mountains, and another visited Gips Valley, inland from the Campbell Range. [NOT CONTROLLED OCR]
Tipo: Text Palavras-chave: Expedition; Greenland; Antarctic; Arctic.
Ano: 1939 URL: http://archimer.ifremer.fr/doc/1939/publication-7340.pdf
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