Medusae, siphonophores and ctenophores of the Magellan Region
Medusae, siphonophores and ctenophores were conspicuous and relatively abundant organisms in the Magellan Straits, Beagle Channel and adjacent waters during the Victor Hensen campaign in 1994. Hydromedusae were the most abundant component of this assemblage (mainly Bougainvillia macloviana, Clytia s...
| Published in: | Scientia Marina |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Consejo Superior de Investigaciones Científicas
1999
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| Subjects: | |
| Online Access: | https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/888 https://doi.org/10.3989/scimar.1999.63s151 |
| Summary: | Medusae, siphonophores and ctenophores were conspicuous and relatively abundant organisms in the Magellan Straits, Beagle Channel and adjacent waters during the Victor Hensen campaign in 1994. Hydromedusae were the most abundant component of this assemblage (mainly Bougainvillia macloviana, Clytia simplex and Obelia spp.) and showed the highest number of species (29). Siphonophores were second in species number (8) and mainly occurred outside the Magellan Straits (mainly Muggiaea atlantica, Dimophyes arctica, Lensia conoidea and Pyrostephos vanhoeffeni). Callianira Antarctica was the only mesozooplanktonic ctenophore and showed a widespread distribution throughout the region. Aggregations of large Beroe cucumis and Desmonema gaudichaudi were observed at some stations. The abundance and depth distribution is given for the most important species and some patterns in the species distribution are postulated. Medusas, sifonóforos y ctenóforos fueron organismos notorios y relativamente abundantes en el Estrecho de Magallanes, Canal del Beagle y aguas circundantes durante la campaña del “Victor Hensen” en 1994. Las hidromedusas constituyeron el componente más abundante de este conjunto (principalmente Bougainvillia macloviana, Clytia simples y Obelia spp.) y mostraron el mayor número de especies (29). Los sifonóforos fueron el segundo grupo en número de especies (8) y se distribuyeron principalmente fuera del Estrecho de Magallanes (principalmente Muggiaea atlantica, Dimophyes arctica, Lensia conoidea y Pyrostephos vanhoeffeni). Callianira antarctica fué el único ctenóforo mesozooplanctónico y mostró una amplia distribución en toda la región. Agregaciones de ejemplares grandes de Beroe cucumis y Desmonema gaudichaudi fueron observadas en algunas estaciones. Se presenta la abundancia y distribución batimétrica para las especies más importantes y se postulan algunas pautas de distribución. |
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