This paper is focused on horizontal, vertical, and temperature-dependent distributions, size composition of bottom and mid-water trawl catches, and biomass estimations of smooth lumpsucker Aptocyclus ventricosus (Pallas) (Cyclopteridae) within the Russian Exclusive Economic Zone (EEZ) of the northwestern Sea of Japan. This species is distributed very widely throughout the study area inhabiting both near-bottom layers and water column. It is less abundant in small bays and in the northern Tatar Strait (north to 50°N). Despite wide bathymetric (0 to 940 m) and temperature (-1.1 to +12.2 °C) ranges this species occurred mainly within the lower mesopelagic zone of 400-800 m depths and cold temperatures of -0.5-1°C. In the near-bottom layer catches of smooth lumpsucker were represented by fish with TL 5-45 cm (mean 28.1 cm, dominant lengths 29-37 cm) while in water column its TL varied 4 to 41 cm with mean 17.9 cm, most abundant were fish with TL 8-15 and 24-31 cm; the difference is associated with specific life history aspects of the species considered. Recent increase of smooth lumpsucker biomass in the study area was observed with estimated value of 3000 t in the northern Primorye.
Allen M.J., Smith G.B. 1988 - Atlas and zoogeography of onnom fishes in the Bering Sea and northeastern Pacific - US Dept. Commer., NOAA Tech. Rept. NMFS 66: 1-158.
Amaoka K., Nakaya K., Yabe M. 1995 - The fishes of northern Japan - Kita-nihon Kaiyo Center Co., Sapporo, 390 p. (in Japanese).
Anthony R.G., Miles A.K., Estes J.A., Isaacs F.B. 1999 - Productivity, diets, and environmental contaminants in nesting bald eagles from the Aleutian Archipelago - Environ. Toxicol. Chem. 18: 2054-2062.
Anthony R.G., Estes J.A., Ricca M.A., Miles A.K., Forsman E.D. 2008 - Bald eagles and sea otters in the Aleutian Archipelago: indirect effects of trophic cascades - Ecology 89: 2725-2735.
Arai M.L. 1988 - Interactions of fish and pelagic coelenterates - Can. J. Zool. 66: 1913-1927.
Bailey K.M. 2011 - An empty Donut Hole: the great collapse f a North American fishery - Ecology and Society 16: 2 (online).URL: http://www.ecologyandsociety.org/vol16/iss2/art28/.
Berzin A.A. 1959 - On the feeding of sperm whales (Physeter catodon) in the Bering Sea - Izv. TINRO 47: 161-165 (in Russian).
Blokhin I.A. 2010 - Diet identification from analysis of excrements and traits of feeding by northern fur seals (Callorhinus ursinus) in the Bering Island in 2000-2007 - Issledovaniya Vodnykh Biologicheskikh Resursov Kamchatki I Severo-Zapadnoi Chasti Tikhogo Okeana 19: 116-126 (in Russian).
Brodeur R.D., Wilson M.T., Walters G.E., Melnikov I.V. 1999 - Forage fishes in the Bering Sea: distribution, species associations, and biomass trends - In: Dynamics of the Bering Sea (Eds) T.R. Loughlin, K. Ohtani, Univ.of Alaska Sea Grant, Fairbanks, USA: 509-580.
Chereshnev I.A., Volobuev V.V., Khovanskii I.E., Shestakov A.V. 2000 - Coastal fishes from the northern part of the Sea of Okhotsk - Dal’nauka, Vladivostok, 197 p (in Russian).
Chodakov A.V., Norvillo G.V., Buslov A.V. 2004 - Some results of bottom and midwater trawl survey for walleye pollock (Theragra chalcogramma) in the western Bering Sea in October-November 2003 aboard the ship “Bagration” - Document submitted for IX Bering Sea Pollock Conference, Kushiro, Japan, 2004 - Federal
Agency for Fisheries of the Russian Federation, Moscow, 15 p.
Conner J., Stevenson D.E., Lauth R.R. 2017 - Results of the 2014 eastern Bering Sea continental shelf bottom trawl survey of groundfish and invertebrate resources - US Dept. Commer., NOAA Tech. Memo. NMFS-AFSC 350: 1-154.
Csepp D.J., Vollenweider J.J., Sigler M.F. 2011 - Seasonal abundance and distribution of pelagic and demersal fishes in southeastern Alaska - Fish. Res. 108: 307-320.
Davenport J. 1985 - Synopsis of biological data on the lumpsucker, Cyclopterus lumpus (Linnaeus, 1758) - FAO Fish. Synopsis 147: 1-31.
Doak D.F., Estes J.A., Halpern B.S., Jacob U., Lindberg D.R., Lavvorn J., Monson D.H., Tinker M.T., Williams T.M., Wootton J.T., Carroll I., Emmerson M., Micheli F., Novak M. 2008 - Understanding and predicting ecological dynamics: are major surprises inevitable? - Ecology 89: 952-961.
Fedorov V.V., Parin N.V. 1998 - Pelagic and benthopelagic fishes from Pacific waters of Russia - VNIRO, Moscow, 154 p. (in Russian).
Fedorov V.V., Chereshnev I.A., Nazarkin M.V., Shestakov A.V., Volobuev V.V. 2003 - Catalog of marine and freshwater fishes of the northern Sea of Okhotsk - Dal’nauka, Vladivostok, 204 p. (in Russian).
Glubokov A.I., Popov S.B. 2004 - Results of echointegrationand trawl surveys in the Donut Hole during November 2003 aboard the ship “Pioner Nikolaeva” - Document submitted for IX Bering Sea Pollock Conference, Kushiro, Japan, 2004, Federal Agency for Fisheries of the Russian Federation, Moscow: 9 p.
Hoff G.R. 2016 - Results of the 2016 Eastern Bering Sea upper continental slope survey of groundfish and invertebrate resources - NOAA Tech. Memo. NMFS-AFSC 339: 1-288.
Homma Y. 1957 - Notes on a smooth lump-sucker, Aptocyclus ventricosus (Pallas), during its breeding season - Collecting and Breeding 19: 235-236 (in Japanese).
Hughes S.E. 1981 - Initial U.S. exploitation of nine Gulf of Alaska seamounts and their associated fish and shellfish resources - Mar. Fish. Rev. 43: 26-33.
Il’insky E.N., Radchenko V. I. 1992 - Distribution and migrations of smooth lumpsucker in the Bering Sea - Biol. Morya 3-4: 19-25 (in Russian).
Kato H. 1982 - Food habits of largha seal pups in the pack ice area - Sci. Rep. Whales Res. Inst. 34: 123-136.
Kim Y.U., Park Y.S., Myoung J.G. 1987 - Development of eggs, larvae and juveniles of smooth lumpsucker, Aptocyclus ventricosus (Pallas) - Bull. Korean Fish. Soc. 20: 157-165.
Kobayashi K. 1962 - Larvae of the smooth lumpsucker, Aptocyclus ventricosus (Pallas), with discussion on revision of the taxonomy of the species - Bull. Fac. Fish. Hokkaido Univ. 8: 153-164.
Kyushin K. 1975 - The embryonic and larval development, growth, survival and changes in body form, and the effect of temperature on these characteristics of the smooth lumpsucker, Aptocyclus ventricosus (Pallas) - Bull. Fac. Fish. Hokkaido Univ. 26: 49-72.
Lee H.W., Hong B.K., Sohn M.H., Chun Y.Y., Lee D.W., Choi Y.M., Hwang K.S. 2010 - Seasonal variation in species composition of fish collected by trammel net around Dokdo, East Sea of Korea - Kor. J. Fish. Aquat. Sci. 43: 693-704.
Lindberg G.U., Krasyukova Z.V. 1987 - Fishes of the Sea of Japan and adjacent parts of Okhotsk and Yellow Seas, Pt. 5, Nauka, Leningrad, 526 p. (in Russian).
Litzow M.A., Mueter F.J. 2014 - Assessing the ecological importance of climate regime shifts: an approach from the North Pacific - Progr. Oceanogr. 120: 110-119.
McKenzie J., Wynne K.M. 2008 - Spatial and temporal variation in the diet of Steller sea lions in the Kodiak Archipelago, 1999 to 2005 - Mar. Ecol. Prog. Ser. 360: 265-283.
Mecklenburg C.W., Mecklenburg T.A., Thorsteinson L.K. 2002 - Fishes of Alaska - Am. Fish. Soc., Bethesda, MD, USA, 1116 p.
Morita K., Sato S., Kagaya M., Katayama Y., Goda Y., Chiba T., Makino K. 2007 - The 2007 summer Japanese salmon research cruise of the R/V Hokko-maru, NPAFC Doc. 1044 - NPAFC Headquarters, Vancouver, BC, Canada, 8 p. (available at http://www.npafc.org).
Mueter F.J., Norcross B.L. 2002 - Spatial and temporal patterns in the demersal fish community on the shelf and upper slope regions of the Gulf of Alaska - Fish. Bull. 100: 559-581.
Nakabo T. 2002 - Fishes of Japan with pictorial keys to the species, English edition -Tokai University Press, Tokyo, 1800 p.
Novikov N.P., Sokolovsky A.S., Sokolovskaya T.G., Yakovlev Y.M. 2002 - The fishes of Prymorye - Dal’rybvtuz, Vladivostok, 552 p. (in Russian).
Orlov A.M. 1994 - Some characteristics of distribution and biological status of Eumicrotremus soldatovi (Cyclopteridae) in the northeastern part of the Sea of Okhotsk in spring - J. Ichthyol. 34: 122-127.
Orlov A.M. 1997 - The qualitative characteristic of feeding of the sablefish Anoploroma fimbria with notes on its occurrence in the Pacific waters of the northern Kuril Islands and southeastern Kamchatka - J. Ichthyol. 37: 3-40.
Orlov A.M. 2005 - Bottom trawl-caught fishes and some features of their vertical distribution in the Pacific waters off the north Kuril Islands and south-east Kamchatka, 1993-1999 - Aqua, J. Ichthyol. Aquat. Biol. 9: 139-160.
Orlov A.M., Tokranov A.M. 2008 - Specific features of distribution, some features of biology, and the dynamics of catches of smooth lumpsucker Artocyclus ventricosus (Cyclopteridae) in waters of the Pacific Ocean off the Kuril Islands and Kamchatka - J. Ichthyol. 48: 81-95.
Orlov A.M., Stroganov A.N., Telegin A.V. 2015 - Perspective representatives of boreal-arctic ichthyofauna for expositions in oceanariums - Uspekhi Sovremennogo Estestvoznaniya 9: 317-330 (in Russian).
Reisewitz S.E., Estes J.A., Simenstad C.A. 2006 - Indirect food web interactions: sea otters and kelp forest fishes in the Aleutian Archipelago - Oecologia 146: 623-631.
Romain S., Dorn M., Wespestad V. 2012 - Results of cooperative research acoustic survey of walleye pollock (Theragra chalcogramma) in the western Gulf of Alaska from September 2007 to September 2011 - US Dept. Commer., NOAA Tech. Memo. NMFS-AFSC 238: 1-35.
Sheiko B.A, Fedorov V.V. 2000 - Class Cephalaspidomorrhi - Lampreys. Class Chondrichthyes - Cartilaginous Fish. Class Holocephali - Chimaeras. Class Osteichthyes - Bony Fish - In: Catalog of vertebrate animals of Kamchatka and adjacent areas (Eds) R.S. Moiseev, A.M. Tokranov, Kamchatskii Pechatnyi Dvor, Petropavlovsk-Kamchatsky: 7-69 (in Russian).
Shuntov V.P. 1965 - Vertical zonality in distribution of fishes in upper bathyal of the Sea of Okhotsk - Zool. Zhurnal 44: 1678-1689 (in Russian).
Shuntov V.P., Bocharov L.N. 2003 - Atlas of quantitative distribution of nekton species in the Okhotsk Sea, Maps, Vol. 1 - National Fisheries Resources, Moscow, 1038 p. (in Russian).
Shuntov V.P., Bocharov L.N. 2004a - Atlas of nekton species quantitative distribution in the northwestern Sea of Japan, Maps, Vol. 2 - National Fisheries Resources, Moscow, 986 p. (in Russian).
Shuntov V.P., Bocharov L.N. 2004b - Nekton of the northwestern Sea of Japan. Tables of abundance, biomass and proportions of species - TINRO-Center, Vladivostok, 225 p. (in Russian).
Shuntov V.P., Bocharov L.N. 2005 - Atlas of nekton species quantitative distribution in the north-western part of the Pacific Ocean, Maps, Vol. 3 - National Fisheries Resources, Moscow, 1080 p. (in Russian).
Shuntov V.P., Bocharov L.N. 2006 - Atlas of nekton species quantitative distribution in the western part of the Bering Sea, Maps, Vol. 4 - National Fisheries Resources, Moscow, 1071 p. (in Russian).
Shuntov V.P., Bocharov L.N. 2012a - Pelagic macrofauna of the western part of the Bering Sea: occurrence, abundance and biomass, 1982-2009 - TINRO-Center, Vladivostok, 479 p. (in Russian).
Shuntov V.P., Bocharov L.N. 2012b - Pelagic macrofauna of the northwestern Pacific: occurrence, abundance and biomass, 1979-2009 - TINRO-Center, Vladivostok, 616 p. (in Russian).
Shuntov V.P., Bocharov L.N. 2012c - Pelagic macrofauna of the Okhotsk Sea: occurrence, abundance and biomass, 1984-2009 - TINRO-Center, Vladivostok, 800 p. (in Russian).
Shuntov V.P., Bocharov L.N. 2014a - Macrofauna of the Peter the Great Bay benthal: tables of occurrence, abundance and biomass, 1978-2009 - TINRO-Center, Vladivostok, 307 p. (in Russian).
Shuntov V.P., Bocharov L.N. 2014b - Macrofauna of the northwestern Sea of Japan benthal: tables of occurrence, abundance and biomass, 1978-2010 - TINRO-Center, Vladivostok, 748 p. (in Russian).
Shuntov V.P., Bocharov L.N. 2014c - Macrofauna of the Sea of Okhotsk pelagial: tables of occurrence, abundance and biomass, 1984-2009 - TINRO-Center, Vladivostok, 800 p. (in Russian).
Sinclair E.H., Stabeno P.J. 2002 - Mesopelagic nekton and associated physics of the southeastern Bering Sea - Deep-Sea Res. II 49: 6127-6145.
Sinclair E.H., Vlietstra L.S., Johnson D.S., Zeppelin T.K., Byrd G.V., Springer A.M., Ream R.R., Hunt G. 2008 - Patterns in prey use among fur seals and seabirds in Pribilof Islands - Deep-Sea Res. II. 55: 1897-1918.
Sokolovsky A.C., Sokolovskaya T.G., Yakovlev Y.M. 2011 - Fishes of the Peter the Great Bay - Dal’nauka, Vladivostok, 431 p. (in Russian).
Ueno T. 1970 - Fauna Japonica. Cyclopteridae (Pisces) - Academic Press of Japan, Tokyo, 233 p.
Ueno Y., Shimizu I., Shershenev A.P. 1990 - Surface water type and distribution of juvenile fishes and cephalopods in Pacific coast waters of Hokkaido and the Kuril Islands in summer, 1989 - Bull. Nat. Res. Inst. Far. Seas Fish. 27: 57-70.
Utekhina I., Potapov E., McGrady M.J. 2000 - Diet of Steller’s sea eagle in the Sea of Okhotsk - First Symposium on Steller’s and White-tailed Sea Eagles in East Asia -Wild Bird Society of Japan, Tokyo: 71-82.
Vinogradov K.A. 1950 - On the biology of smooth lumpsucker in waters off Kamchatka - Priroda 3: 69-70 (in Russian).
Yang M-S., Livingston P.A. 1988 - Food habits and daily ration of Greenland halibut, Reinhardtius hippoglossoides, in the eastern Bering Sea - Fish. Bull. 86: 675-690.
Watt J., Siniff D. B., Estes J.A. 2000 - Inter-decadal patterns of population and dietary change in sea otters at Amchitka Island, Alaska - Oecologia 124: 289-298.
Yoshida H. 1994 - Food and feeding habit of pelagic walleye pollock in the central Bering Sea in summer, 1976-1980 - Sci. Rep. Hokkaido Fish. Exp. Stn. 45: 1-35.
Yoshida H., Yamaguchi H. 1985 - Distribution and feeding habits of the pelagic smooth lumpsucker, Aptocyclus ventricosus (Pallas), in the Aleutian basin - Bull. Fac. Fish. Hokkaido Univ. 36: 200-209.
Yoshida H., Mihara Y. 2015 - Catches of smooth lumpsucker, Aptocyclus ventricosus (Pallas) in Hokkaido - Sci. Rep. Hokkaido Fish. Res. Inst. 88: 59-68 (in Japanese).
Zeppelin T.K., Ream R.R. 2006 - Foraging habitats based on the diet of female northern fur seals (Callorhinus ursinus) on the Pribilof Islands, Alaska - J. Zool. 270: 565-576.