naa a22 4500 510765300 CHVBK 20180411083154.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1134/S0001437013040036 doi (NATIONALLICENCE)springer-10.1134/S0001437013040036 Feeding, respiration, and excretion of the Black Sea Noctiluca scintillans MacCartney in summer [Elektronische Daten] [A. Drits, A. Nikishina, V. Sergeeva, K. Solov'ev] Studies were conducted at the end of June 2011 in the coastal region of the northeastern part of the Black Sea. The bulk of the Noctiluca scintillans population was observed in the thermocline and reached a density of 40000 ind./m3. Analysis of digestive vacuoles content showed that Noctiluca could consume cells of Neoceratium tripos and N. furca, which had been considered inedible for Black Sea zooplankton, as well as temporary cysts of dinoflagellates, presumably of the toxic genus Alexandrium. The Noctiluca population consumed in total 10-30% of the abundance of temporary cysts, 2-29% of primary production, and 2-9% of potential Calanus euxinus egg production. For the first time, the excretion rates of ammonium nitrogen and mineral phosphorus were measured for N. scintillans. Our calculations showed that in summer, excretion by Noctiluca contributed from 4 to 18% and from 15 to 53% of phytoplankton total nitrogen and phosphorus requirements, respectively. The specific growth rate of Noctiluca (0.17-0.35) in summer, estimated from data on the daily food intake and respiration rate, was close to the values obtained in spring. Pleiades Publishing, Ltd., 2013 Drits A. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia aut Nikishina A. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia aut Sergeeva V. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia aut Solov'ev K. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia aut Oceanology Springer US; http://www.springer-ny.com 53/4(2013-07-01), 442-450 0001-4370 53:4<442 2013 53 11491 https://doi.org/10.1134/S0001437013040036 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0001437013040036 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Drits A. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia aut NATIONALLICENCE 700 1- Nikishina A. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia aut NATIONALLICENCE 700 1- Sergeeva V. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia aut NATIONALLICENCE 700 1- Solov'ev K. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia aut NATIONALLICENCE 773 0- Oceanology Springer US; http://www.springer-ny.com 53/4(2013-07-01), 442-450 0001-4370 53:4<442 2013 53 11491 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer