STATE OF CALANUS EUXINUS (COPEPODA) POPULATION IN THE NORTH-WESTERN BLACK SEA IN OCTOBER 2010
Keywords:
Calanus euxinus, abundance, biomass, lipid reserves, reproductive index, the Black SeaAbstract
Abundance, biomass, age composition, lipid reserves in Calanus euxinus population from the deep shelf and slope zones of the north-western Black Sea were studied basing on the data collected during the cruise of the R/V “Professor Vodyanitsky” in October 2010. Reproductive activity of females was evaluated according to the gonad and oocyte maturity stages. Maximum number (3864 ind m-2), biomass (2.8 g m-2), female reproductive index (78 ± 18 %) and egg production rate (36.8 ± 17.7 egg· female-1 day-1) were found in the slope zone. Age composition and lipid reserves (20.2 ± 7.9 % of body volume in the fifth copepodite stages dominating in the population) were considered to be typical for C. euxinus from the Main Black Sea Current.
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