Gubareva O. The effect of oxygen concentration on metabolism and locomotion characteristics of planktonic crustaceans Moina micrura Hellich (Cladocera) and Calanus euxinus Hulsemann (Copepoda)

The Black Sea planktonic crustaceans: Moina micrura (Cladocera) from two laboratory cultures, non-acclimated and acclimated to hypoxia, and Calanus euxinus (Copepoda) from two natural ecological groups - those migrating daily to oxygen-deficient layers or those diapausing there. Revealing the peculiarities of metabolic and behavioural reaction to hypoxia in planktonic crustaceans with different ecological specialization. The methods to study the parameters of metabolism and locomotion: polarography, photometry (method of Sadgy-Solorzano), tensometry, original computer programme for locomotor pattern analyzing. The relationships, conditioning changes in energy and nitrogen metabolism, locomotor activity under oxygen concentration decreasing were determined. The differences in mechanisms of adaptation of planktonic crustaceans to short- and long-term hypoxia were found. First complex investigation of weight-specific respiration, ammonia excretion rates, utilization of metabolic substrates in total, basa l and activity metabolism, metabolic energy of locomotion at different oxygen concentration was conducted. Results obtained are used in IBSS to exactify productional-energy estimation of development of mass representative of the Black Sea zooplankton, Calanus euxinus, under changing oxygen conditions. The dissertation work is used in course of lectures at the Department of Zoology of Kharkov State University. Hydrobiology, ecophysiology, ethology.