VERTICAL DISTRIBUTION AND FEEDING BEHAVIOR OF COPEPODS UNDER SEA-ICE IN LAKE SAROMA (EXTENDED ABSTRACT)
Under sea-ice, copepod feeding on algal communities is one of the most important processes of food web dynamics, just as in the area without ice coverage. Lake Saroma is the southernmost body of water covered by seasonal sea ice in the northern hemisphere. Very little is known about the distribution...
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| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.629.6761 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1994-Hattori.pdf |
| Summary: | Under sea-ice, copepod feeding on algal communities is one of the most important processes of food web dynamics, just as in the area without ice coverage. Lake Saroma is the southernmost body of water covered by seasonal sea ice in the northern hemisphere. Very little is known about the distribution and feeding behavior of zooplankton under ice in Lake Saroma. In this study, die1 changes in vertical distribution and feeding of copepods were examined in Lake Saroma. Our main goal was to estimate energy transport from primary producers to copepods during the early growth periods of phytoplankton under the sea-ice. This study was supported in part by a grant from the Ministry of Education, Science and Culture (No. 03044146). Zooplankton sampling for vertical distribution, biomass and gut pigment was carried out 7 times a day under sea ice in Lake Saroma during February 25 and 26, 1992. The NIPR-net (FUKUCHI et al., 1979) with 0.33 mm mesh openings was used for sampling at 5 depths from 0 to 9 m below the under-surface of the ice. Distance from the under-surface of the ice to the bottom at the sampling site was |
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