Results of multidisciplinary survey in the Laptev Sea in August-September, 2015

Data on oceanographic conditions and species composition of plankton, benthic and demersal fish and invertebrates are presented, obtained in the complex survey over the external shelf of the Laptev Sea in August-September 2015. The zooplankton abundance was low, with only local increases up to 400 m...

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Published inIzvestiâ Tihookeanskogo naučno-issledovatelʹskogo rybohozâjstvennogo centra Vol. 187; no. 4; pp. 72 - 88
Main Authors Glebov, Igor I., Nadtochy, Victor A., Savin, Andrey B., Slabinsky, Alexander M., Borilko, Oleg Yu, Chulchekov, Denis N., Sokolov, Anatoly S.
Format Journal Article
LanguageEnglish
Russian
Published Transactions of the Pacific Research Institute of Fisheries and Oceanography 30.12.2016
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Summary:Data on oceanographic conditions and species composition of plankton, benthic and demersal fish and invertebrates are presented, obtained in the complex survey over the external shelf of the Laptev Sea in August-September 2015. The zooplankton abundance was low, with only local increases up to 400 mg/m3. Species diversity of fish and nekton invertebrates in the bottom trawl catches was low, too: 26 fish species and 2 species of cephalopods. Mean biomass of fish was estimated as 4.3 t/km2 (in total 132. 103 t within the surveyed area of 30,500 km2). All fish species were distributed sparse. Arctic cod was the most abundant and occurred over the whole surveyed area, with large-sized fish dominating at the bottom and medium-sized (9-15 cm) fish - in the pelagic layer, other commercial species were greenland halibut and deepwater redfish caught on the continental slope. Bottom invertebrates in trawl catches were presented by 6 species of shrimp and 12 taxonomic groups of different rank, with predominance of starfish, brittle stars and sponges; gastropods were represented by 11 species, with Neptunea heros dominating by mass (42 %). Macrobenthos in samples of the bottom sampler was presented by 20 taxonomic groups, with predominance of polychaetes, bivalves and sipunculoids.
ISSN:1606-9919
2658-5510
DOI:10.26428/1606-9919-2016-187-72-88