Entanglement of northern fur seals (Callorhinus ursinus) in marine debris on Tyuleniy Island (Sea of Okhotsk) in 1998-2013.

The systematic annual observations of the northern fur seal rookery on Tyuleniy (= Robben) Island, Sea of Okhotsk, were started in 1958. Since 1975, all seals entangled in marine debris have been registered. Some of the data on this issue, collected on the island in the late 20th century, were published earlier.

Protective action of alkylglycerols under stress.

The adaptogenic properties of alkylglycerols (AGs) after 1 month's treatment were investigated in a rat model of acute immobilization stress (AIS). The animals receiving AGs 157 mg/kg showed a body weight (BW) decrease in addition to a more pronounced increase in the adrenal glands index under stress conditions. Also, AGs at this dose prevented AIS-induced catalase inhibition.

Species richness and taxonomic composition of trawl macrofauna of the North Pacific and its adjacent seas.

A checklist is presented of animal species obtained in 68,903 trawl tows during 459 research surveys performed by the Pacific Research Fisheries Center (TINRO-Center) over an area measuring nearly 25 million km in the Chukchi and Bering seas, Sea of Okhotsk, Sea of Japan and North Pacific Ocean in 1977-2014 at depths of 5 to 2,200 m. The checklist comprises 949 fish species, 588 invertebrate species, and four cyclostome species (some specimens were identified only to genus or family level). For each species details are given on the type of trawl (benthic and/or pelagic) and basins where the species was found.

[Inhibitory effect of antimicrobial preparation from lipids of marine fishes on tissue and microbial enzymes].

We obtained a new food preservative from marine fish lipids possessing pronounced activity in relation to bacteria and microscopic fungi. The effects of this preparation on enzymes of microorganisms and muscle tissue of marine hydrobionts were studied. In vitro the preparation irreversibly inhibited acid and alkaline proteases and proteolytic and lipolytic enzymes of microorganisms and reduced enzyme activity in fish muscle tissue.

[Effect of endogenous enzymes on composition of oligonucleotides isolated from gonads of hydrobionts].

Preparations of low-molecular-weight DNA were obtained from gonads of various hydrobiont species by alcohol precipitation technique. An enzymatic hydrolysis-based method for producing soluble low-molecular-weight DNA was developed. All the nucleic acid components of the preparations obtained were separated by electrophoresis, and their molecular weights were determined.