Fisheries research in the Chukchi Sea at the RV «Professor Levanidov» in August 2019: some preliminary results

Орлов, А. М.; Бензик, А. Н.; Vedishcheva, E. V.; Gafitsky, S.V.; Горбатенко, К. М.; Goryanina, S. V.; Zubarevich, Victor; Kodryan, K. V.; Nosov, M. A.; Orlova, S. Yu.; Pedchenko, A. P.; Rybakov, M. O.; Sokolov, A. M.; Somov, Alexei; Subbotin, S.N.; Taptygin, М.Yu.; Firsov, Yu.L.; Хлебородов, Антон Сергеевич; Chikilev, V. G.

doi:10.36038/2307-3497-2019-178-206-220

Cited by 22 publications

(4 citation statements)

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“…Modeled bowhead whale habitat use from 2015 to 2017 tag data suggested that they experienced the highest number of underwater noise events and greatest overlap with ship traffic September-October in the southern Chukchi Sea [68], where whales may be spending more time or overwintering in the future. While commercial fishing is currently banned in the high Arctic [69], the Russian Federation has recently started a commercial pollock fishery in the western Chukchi Sea and fisheries research in the region suggests that large biomass of snow crab (Chionoecetes opilio) exists in the region [70]. The most recent information on entanglement rates for BCB bowheads, which are over a decade old, suggest that overall, roughly 12% of whales show evidence of entanglement while 50% of large (older) whales show some evidence of entanglement [49,71].…”

Section: Future Threats For Humans and Whalesmentioning

confidence: 99%

Sea ice directs changes in bowhead whale phenology through the Bering Strait

Szesciorka

Stafford

2023

Mov Ecol

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Background Climate change is warming the Arctic faster than the rest of the planet. Shifts in whale migration timing have been linked to climate change in temperate and sub-Arctic regions, and evidence suggests Bering–Chukchi–Beaufort (BCB) bowhead whales (Balaena mysticetus) might be overwintering in the Canadian Beaufort Sea. Methods We used an 11-year timeseries (spanning 2009–2021) of BCB bowhead whale presence in the southern Chukchi Sea (inferred from passive acoustic monitoring) to explore relationships between migration timing and sea ice in the Chukchi and Bering Seas. Results Fall southward migration into the Bering Strait was delayed in years with less mean October Chukchi Sea ice area and earlier in years with greater sea ice area (p = 0.04, r2 = 0.40). Greater mean October–December Bering Sea ice area resulted in longer absences between whales migrating south in the fall and north in the spring (p < 0.01, r2 = 0.85). A stepwise shift after 2012–2013 shows some whales are remaining in southern Chukchi Sea rather than moving through the Bering Strait and into the northwestern Bering Sea for the winter. Spring northward migration into the southern Chukchi Sea was earlier in years with less mean January–March Chukchi Sea ice area and delayed in years with greater sea ice area (p < 0.01, r2 = 0.82). Conclusions As sea ice continues to decline, northward spring-time migration could shift earlier or more bowhead whales may overwinter at summer feeding grounds. Changes to bowhead whale migration could increase the overlap with ships and impact Indigenous communities that rely on bowhead whales for nutritional and cultural subsistence.

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Section: Future Threats For Humans and Whalesmentioning

confidence: 99%

Sea ice directs changes in bowhead whale phenology through the Bering Strait

Szesciorka

Stafford

2023

Mov Ecol

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“…Its presence in this area was only recently reported, but the abundance of this species was considered insignificant [6]. In August 2019, adult walleye pollock were found in large amounts in the western Chukchi Sea, and in September 2019 several specimens were caught in the Laptev Sea [5,[54][55][56][57]. However, there was no detailed description of the records in the latter area.…”

Section: Discussionmentioning

confidence: 99%

“…Only recently there was information about its presence in this area, but the abundance of this species was considered insignificant here [6]. In recent years, adult pollock has been found in large numbers in the western Chukchi Sea [5,[54][55][56][57]. New captures of medium-sized walleye pollock in the Laptev and Kara Seas suggest that individuals of this species at the early life stages from the Bering Sea through the Bering Strait with Pacific inflow [79] are transported to the Chukchi and East Siberian Seas.…”

Section: Discussionmentioning

confidence: 99%

“…New captures of medium-sized walleye pollock in the Laptev and Kara Seas suggest that individuals of this species at the early life stages from the Bering Sea through the Bering Strait with Pacific inflow [79] are transported to the Chukchi and East Siberian Seas. This possibility is evidenced by the appearance in recent years, along with adult walleye pollock, of a noticeable number of juveniles in the Chukchi Sea [54]. It can be further assumed that, after reaching a certain length, walleye pollock can perform active lengthy migrations, which are an integral part of its lifecycle [5,[80][81][82].…”

Section: Discussionmentioning

confidence: 99%

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Walleye Pollock Gadus chalcogrammus, a Species with Continuous Range from the Norwegian Sea to Korea, Japan, and California: New Records from the Siberian Arctic

Орлов

Rybakov

Vedishcheva

et al. 2021

JMSE

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The first records of walleye pollock Gadus chalcogrammus Pallas, 1814 in the seas of the Siberian Arctic (the Laptev Sea, the Kara Sea, the southeastern Barents Sea), are documented. Information about the external morphology (morphometric and meristic characters), photos of sagittal otoliths and fish, and data on the sequences of the CO1 mtDNA gene are presented. The results of a comparative analysis indicate that walleye pollock caught in the Siberian Arctic do not differ in principle from North Pacific and North Atlantic individuals. Previous conclusions about the conspecificity of the walleye and Norwegian pollock Theragra finnmarchica are confirmed. New captures of walleye pollock in the Siberian Arctic allow us to formulate a hypothesis about its continuous species’ range from the coasts of Norway in the North Atlantic to the coasts of Korea, Japan, and California in the North Pacific. The few records of walleye pollock in the North Atlantic originate from the North Pacific due to the transport of early pelagic juveniles to the Arctic by currents through the Bering Strait and further active westward migrations of individuals which have switched to the bentho-pelagic mode of life.

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Arctic Fisheries in a Changing Climate

Mueter

2022

Global Arctic

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Fisheries research in the Chukchi Sea at the RV «Professor Levanidov» in August 2019: some preliminary results

Cited by 22 publications

References 0 publications

Sea ice directs changes in bowhead whale phenology through the Bering Strait

Sea ice directs changes in bowhead whale phenology through the Bering Strait

Walleye Pollock Gadus chalcogrammus, a Species with Continuous Range from the Norwegian Sea to Korea, Japan, and California: New Records from the Siberian Arctic

Arctic Fisheries in a Changing Climate

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