| Registro completo |
| Provedor de dados: |
OMA
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| País: |
Belgium
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| Título: |
Distribution and adaptations of sea ice inhabiting <i>Harpacticoida</i> (Crustacea, Copepoda) of the Weddell Sea (Antarctica)
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| Autores: |
Dahms, H.-U.
Bergmans, M.
Schminke, H.K.
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| Data: |
1990
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| Ano: |
1990
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| Palavras-chave: |
Biogeography Dormancy Ecology Life history Salinity tolerance Harpacticoida PSW
Weddell Sea
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| Resumo: |
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, necessary both for horizontal dispersal and for a planktonic intermezzo after annual melting of the sea ice. <i>D. glacialis</i> is the first polar non-vertebrate metazoan to be cultivated through its entire life cycle. Its life history suggests an r-strategy; this would be the first indication of such a trait in the polar environment. A new species of <i>Drescheriella</i>, on the other hand, exhibits resting stages (CIV-V) known to date only for <i>Calanoida</i> but not reported for <i>Harpacticoida</i>.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3067
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| Fonte: |
%3Ci%3EMar.+Ecol.+%28Berl.%29+11%283%29%3C%2Fi%3E%3A+207-226
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| Direitos: |
info:eu-repo/semantics/restrictedAccess
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