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Vol. 9 (2006 year), No. 5
Dvoretsky V.G., Pakhomova N.A.
The comparative characteristic of Oithona similis (Claus) populations in waters of the Pechora Sea and Eastern Murman near-shore area
The paper considers the ecological peculiarities of molluscs of the family Planorbidae. This family includes two species of the genus Anisus in the northwestern part of the Murmansk region. Biotopes containing dead sections of plants and algae are the basic habitat for the representatives of the family. The regularities of planorbid biomass distribution in different biotope types have been found.
(in Russian, стр.8, fig. 4, tables. 3, ref 39, Adobe PDF, Adobe PDF 0 Kb)
Vol. 16 (2013 year), No. 3
Dvoretsky A.G., Dvoretsky V.G.
Species composition of macrosymbionts and epibionts of red king crab in the littoral of the Barents Sea (Dalnezelenetskaya Bay) in 2010
The study of the community of organisms associated with the red king crab was undertaken in Dalnezelenetskaya Bay (Barents Sea) in July 2010. A total of 39 taxa were found on crabs. Total prevalence of infestation was 82.7 %. Among fouling organisms the barnacle Balanus crenatus and the bivalve mollusk Mytilus edulis were predominating while the most common symbionts were the amphipods Ischyrocerus spp. and the harpacticoid copepods Tisbe furcata and Harpacticus uniremis. Differences in infestation levels between the present data and results of the previous studies have been discussed.
(in Russian, стр.8, fig. 3, tables. 2, ref 28, Adobe PDF, Adobe PDF 0 Kb)
Vol. 16 (2013 year), No. 3
Dvoretsky V.G., Dvoretsky A.G.
The mortality levels of two common copepods in the Barents Sea
In the Barents Sea, instantaneous mortality levels have been calculated for the first time in the common Arctic zooplankters Calanus finmarchicus (Gunner, 1765) and Calanus glacialis Jaschnov, 1955. In summer 2006, the first species reach their maximum abundance in the south; there its mortality varied from 0,005 to 0,133 day–1. The second species was present in the northern and eastern parts. The mortality rates ranged from 0,001 to 0,540 day–1. Possible factors caused mortality of these copepods in the Barents Sea have been discussed.
(in Russian, стр.6, fig. 3, tables. 1, ref 17, Adobe PDF, Adobe PDF 0 Kb)