most other aspects of the life history. On the basis of buoy-ancy measurements, McMurdo Sound notothenioids were grouped into the four adaptive or ecological types men-tioned above. Publications now in preparation will docu-ment the morphological specializations of each of these types. The nototheni...
| Main Authors: | , , , |
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.654.2179 http://cedarcreek.umn.edu/biblio/fulltext/Antarctic+Journal+Vol+15+1980+Thomas.pdf |
| Summary: | most other aspects of the life history. On the basis of buoy-ancy measurements, McMurdo Sound notothenioids were grouped into the four adaptive or ecological types men-tioned above. Publications now in preparation will docu-ment the morphological specializations of each of these types. The notothenioid fishes of McMurdo Sound are an old, well-adapted group that probably evolved with the ecosys-tem. In the absence of competition from other fish groups, they radiated into several underutilized water column hab-itats. In adapting to these habitats, the basic benthic body type was extensively modified in some species. Buoyancy adaptations, allowing more efficient swimming and feeding in the water column, evolved in many body systems. The majority of notothenioids, however, remain trophically generalized bottom dwellers that feed on benthos, a season-ally stable food resource in the southern ocean. |
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