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An <i>r</i>-strategist in Antarctic pack ice OMA
Bergmans, M.; Dahms, H.-U.; Schminke, H.K..
The Antarctic copepod <i>Drescheriella glacialis</i>, an inhabitant of sea ice, is the first polar invertebrate metazoan to have been cultured throughout its life cycle. We describe its demographic characteristics on the basis of a laboratory cohort study and correlative field data. When compared to its closest temperate zone relatives, <i>D. glacialis</i> shows temperate compensation of developmental and reproductive rates. A genuine <i>r</i>-strategist in every respect, it does not fit established trends for Antarctic invertebrates but appears well adapted to the peculiar spatio-temporal variability.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Polar waters Population structure Reproduction Reproductive cycle Sea ice Temperature effects Copepoda [copepods] Drescheriella glacialis PS; Antarctica PSW; Weddell Sea.
Ano: 1991 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3111
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Distribution and adaptations of sea ice inhabiting <i>Harpacticoida</i> (Crustacea, Copepoda) of the Weddell Sea (Antarctica) OMA
Dahms, H.-U.; Bergmans, M.; Schminke, H.K..
Seven harpacticoid species were found to be associated with sea ice collected during 5 Antarctic cruises of the <i>RV Polarstern</i>. Their distribution within the fast ice and pack ice zones of the Weddell Sea is presented. Whereas some individuals probably become entrapped into the ice only accidentally, at least 4 species are genuinely sympagic. These have evolved remarkable adaptations, as evidenced by field and laboratory studies of <i>Drescheriella glacialis</i>, which is by far the most abundant. Such adaptations include: the ability to penetrate deep into ice; a comparatively high salinity tolerance allowing it to endure large salinity fluctuations associated with ice crystal formation and melting; good swimming ability,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biogeography Dormancy Ecology Life history Salinity tolerance Harpacticoida PSW; Weddell Sea.
Ano: 1990 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3067
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Parastenocarididae (Copepoda, Harpacticoida) from The Netherlands Naturalis
Schminke, H.K.; Notenboom, J..
A survey of the groundwater fauna of The Netherlands has revealed the presence of 4 species of Parastenocarididae, viz. Parastenocaris fontinalis Schnitter & Chappuis, 1915, P. tumida Kiefer, 1961, P. germanica Kiefer, 1936, and P. nolli Kiefer, 1938, the latter two being new for The Netherlands. P. tumida is only imperfectly known, but there is enough material so that a full description can now be given not only of the female but also of the male hitherto unknown.
Tipo: Article / Letter to the editor Palavras-chave: Copepoda; Parastenocaris; Taxonomy; Distribution; Netherlands.
Ano: 1990 URL: http://www.repository.naturalis.nl/record/504353
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Sea ice inhabiting Harpacticoida (Crustacea, Copepoda) of the Weddell Sea (Antarctica) OMA
Dahms, H.-U.; Schminke, H.K..
Five species of harpacticoid copepods belonging to three families and four genera were collected from various samples of sea ice taken during five cruises of RV Polarstern to the Weddell Sea from 1985-89. One species is new and described, namely <i>Hastigerella antarctica</i> sp. n. <i>Drescheriella racovitzai</i> comb. n. (Griesbrecht, 1902), <i>Harpacticus furcifer</i> Giesbrecht, 1902 and <i>Idomene antarctica</i> (Giesbrecht, 1902) are redescribed. The fourth nauplius of an unknown representative of Ectinosomatidae is described as well as three naupliar stages of <i>Harpacticus furcifer</i>.
Tipo: Info:eu-repo/semantics/article
Ano: 1992 URL: http://www.vliz.be/imisdocs/publications/303562.pdf
Registros recuperados: 4
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