Scientia Marina, Vol 69, No S2 (2005)

Zoogeographical relationships of the littoral ascidiofauna at the Antarctic Peninsula, in the Scotia Arc and in the Magellan region


https://doi.org/10.3989/scimar.2005.69s2215

Alfonso A. Ramos-Esplá
Marine Biology Laboratory, Department of Marine Sciences and Applied Biology, University of Alicante, Spain

Juan A. Cárcel
Marine Biology Laboratory, Department of Marine Sciences and Applied Biology, University of Alicante, Spain

Mercedes Varela
Marine Biology Laboratory, Department of Marine Sciences and Applied Biology, University of Alicante, Spain

Abstract


Three Spanish Antarctic research cruises (Ant-8611, Bentart-94 and Bentart-95) were carried out in the South Shetland Archipelago (Antarctic Peninsula) and Scotia Arc (South Orkney, South Sandwich and South Georgia archipelagos) on the continental shelf and upper slope (10-600 m depth). They have contributed to our knowledge about ascidian distribution and the zoogeographical relationships with the neighbouring areas and the other Subantarctic islands. The distribution of ascidian species suggests that the Scotia Arc is divided into two sectors, the South Orkney Archipelago, related to the Antarctic Province, and the South Georgia Archipelago (probably including the South Sandwich Archipelago), which is intermediate between the Antarctic Province and the Magellan region.

Keywords


ascidians; Antarctic; Scotia Arc; Magellan; biogeography

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