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Rysakova K.S., Novikov V.Yu., Mukhin V.A., Ovchinnikova S.I.

Research of chitinolythetic activity in digestive organs of hydroinvertebrates of the Barents Sea

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Abstract. The investigation results of phytoplankton photosynthetic pigments and species composition in the southern part of the Kola bay in the winter-vernal period have been presented. The maximal chlorophyll Р° concentration during hydrological winter in the surface layer reached 0.043 Вµg/l, in spring - 0.159 Вµg/l. In the bottom layer this index was 0.043 Вµg/l, in the vernal period - 0.119 Вµg/l. On the basis of chlorophyll Р° concentrations, pheophytin Р°, Margalef index and carotenoids/chlorophyll Р° ratio - the indices of the phytoplankton physiological state - during the observation period phytocenosis possessed low photosynthetic and production activity. Low abundance and biomass of micro-algae have corresponded to the conclusions. The active functional state of phytoplankton community during the Polar night and lack of typical for the Barents Sea coastal zone early-vernal micro-algae blossom peak in the southern part of the Kola bay have been explained by the development peculiarities of the estuary pelagic phytocenosis.

Printed reference: Research of chitinolythetic activity in digestive organs of hydroinvertebrates of the Barents Sea / K.S. Rysakova, V.Yu. Novikov, V.A. Mukhin, S.I. Ovchinnikova // Vestnik of MSTU. 2006. V. 9, No 5. P. -.

Electronic reference: Research of chitinolythetic activity in digestive organs of hydroinvertebrates of the Barents Sea / K.S. Rysakova, V.Yu. Novikov, V.A. Mukhin, S.I. Ovchinnikova // Vestnik of MSTU. 2006. V. 9, No 5. P. -. URL: http://vestnik.mstu.edu.ru/v09_5_n25/articles/12_rysak.pdf.

(In Russian, p.6, fig. 6, tables 3, ref 10, Adobe PDF)