Further investigations on the carbohydrate content of marine zooplankton. Limnology and Oceanography
Studies on the carbohydrate content of 11 species of planktonic animals have been carried out. In the case OI Culanus finmarchicus, C. hyperboreus and Neomysis umericunu, certain animals wcrc fed laboratory phytoplankton cultures and comparisons were made between fed and starved groups. For Cnlanzcs...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
1961
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.553.4821 http://www.aslo.org/lo/toc/vol_6/issue_2/0154.pdf |
| Summary: | Studies on the carbohydrate content of 11 species of planktonic animals have been carried out. In the case OI Culanus finmarchicus, C. hyperboreus and Neomysis umericunu, certain animals wcrc fed laboratory phytoplankton cultures and comparisons were made between fed and starved groups. For Cnlanzcs finmurchicus, fed animals contained from 0.90-2.85 pg and starved animals from 0.68-1.50 pug carbohydrate/animal. As percent wet weight the carbohydrates ranged from 0.11-0.40 for fed and from 0.10-0.24 for starved C. finmarchicus. The carbohydrates in C. hyperborens ranged from 0.14-0.29s wet weight and in Neomysis from 0.19-0.23%, but there was no significant differcncc between fed and starved animals. Feeding expcrimcnts wcrc also attempted with the euphausids Megunyctiphunes norvegicu and Thysunoessu sp. but feeding was poor and again no sig-nificant difference over the concentrations in starved animals could bc detected. The concentration for all the euphausids was rather low: O.OS-0.08 % wet weight for Megu-nyctiphunes, 0.09-0.11 % for Thysunoessu, and 0.08-0.17 for Nemutoscelis megulops. Carbohydrates were also low for the copepods Puracuchuetu norvegica (0.06-0.11%) and Pleuromamma sp. (0.10%) and for IIyperiu gulbu (0.15%). Another amphipod Euthe-mist0 contained from 0.2%0.62 % wet weight carbohydrate and an ostracod Conchoeciu 0.310/o. Respiratory mcasurcments during periods of starvation were made for Calanus hyperboreus, Nemutoscelis mczcgubops and Neomysis umericunu which indicated that consid-erably more carbon was being oxidized than could bc nccountcd for by changes in the carbohydrate content of the animals. Conversely, in certain feeding expcrimcnts with Neomysis americana and C. finmurchicus it seemed very doubtful that sufficient carbohy-drate was obtained in the food consumed to meet the carbon rcquircments if carbohydrate was the principal energy source. It is concluded that the animals in question do not contain sufficient carbohydrate reserves to meet energy rcquircments, particularly during ... |
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