ORIGINAL PAPER
Abstract Fieldwork was carried out at Kerguelen Is-lands. Two groups of stations in a coastal area, the Morbihan gulf, were surveyed. At both stations, mac-roplankton biomass ranged from 2.3 mg dry weight m3 to 89 mg dry weight m3 and consisted mostly of The-misto gaudichaudii with values ranging fr...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.516.4363 http://www.obs-vlfr.fr/LOV/PZPK/pubpdf/Labat_2005.pdf |
| Summary: | Abstract Fieldwork was carried out at Kerguelen Is-lands. Two groups of stations in a coastal area, the Morbihan gulf, were surveyed. At both stations, mac-roplankton biomass ranged from 2.3 mg dry weight m3 to 89 mg dry weight m3 and consisted mostly of The-misto gaudichaudii with values ranging from 1.9 mg dry weight m3 to 50.6 mg dry weight m3. Biomass was high for sub-Antarctic waters with marked seasonal and inter-zone differences. Biomass minima were observed at the end of the winter, from September to November, while maxima were recorded in summer and in early fall at the beginning of the year between January and April. T. gaudichaudii showed a recruitment of new size classes, mainly from November to January, followed by a rapid growth phase in summer, which slowed down during the southern winter period. Individuals breed after 1 year. Large individuals, older than 1 year, were not a sig-nificant presence in the gulf of Morbihan. The main pattern of the population dynamics were characterised by an univoltine life cycle with a very high biomass marked by a strong seasonal signal linked with the hy-drological and trophic parameters of the Gulf. |
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