Level of energetic exchange and food requirements of Antarctic Salpa thompsoni Foxton
Description The interest to salps is caused by their abundance and certainly large role in the Antarctic Ecosystem, which is displayed at significant increase of number especially.
In the spring 1998 and 2002 at first the distinction in levels of respiration at solitary (oozoids) and aggregated (blastozoids) forms of S. thompsoni are revealed. The both forms displayed similar daily rhythm of respiration rate. Irrespective of individual body mass, under density of settlement of animals in experimental vessels equal 3 g wet mass * l -1, their daily average values of energetic metabolism have made 79,5 ¼g O2* g-1*h-1 at oozoids and 41,5 ¼g O2* g-1*h-1 at blastozoids or 125 % and 61 % of body carbon contents per day correspondingly.
Also In 2002 we carried out the measurements of rations of salps by radiocarbon method. During 2-4 hours rations linearly increased with increasing of algae concentration (0,2-2,3 mg C *l-1), from 0,3 % up to 70 % of body carbon contents per day irrespective of body mass of salps in the range 2,1-16,4 g. The dependence of values of ration of salps on their body mass was observed only in comparison with results of experiments with recently budded (0.28 g) aggregations.Note Key words: Antarctic Marine Ecosystems, outbreak of number of salps, energetic requirements.Author N.I. Minkina, E.Z. Samyshev· JPG file - 2.31 MB - 2 384 x 3 370 pixels
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