Abstract
The Antarctic Ocean is characterized by a circumpolar system of currents and hydrographic fronts. This causes a high transport of water masses between east and west, but reduces exchange mechanisms in the upper 1000-m water column in a north-south direction. Thus the Antarctic Convergence is a great barrier for pelagic organisms, except birds and mammals. For benthic animals, the deep-sea basins form a border in distribution. This hydrographic and topographic isolation of the Antarctic Continent resulted in a very high percentage of endemism in different taxonomic groups. Eighty-eight percent of the fish species and 76% of the genera are endemic to the Antarctic Ocean (Andriashev 1987). Values for other benthic groups range between 60 and 90% (Hempel 1985).
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Ekau, W. (1991). Morphological Adaptations and Mode of Life in High Antarctic Fish. In: di Prisco, G., Maresca, B., Tota, B. (eds) Biology of Antarctic Fish. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-76217-8_2
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DOI: https://doi.org/10.1007/978-3-642-76217-8_2
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