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To the problem of life strategy of herbivorous copepods physiology and biochemical composition of the overwintering calanus glacialis in starvation conditions



To the problem of life strategy of herbivorous copepods physiology and biochemical composition of the overwintering calanus glacialis in starvation conditions



Okeanologiya 28(4): 657-662



The gut contents, respiration rate and biochemical composition (the content of proteins, lipids and carbohydrates) of overwintering females Calanus glacialis were investigated. The material was collected in the Kandalaksha Bay of the White Sea [USSR] of hydrological winter. Copepods were not feeding in the sea, their guts were empty and there was no peristalsis at all. The cultivation of copepods in starvation conditions showed that the amount of lipids was steadily decreasing, while those of proteins and carbohydrates remained almost at the same level. The energy content of lipids spent by starved animals were equilvalent to the energy expenditure estimated from respiratory requirements. The obtained results proved that lipids was the main source of energy for starving Calanus.

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