scholarly journals Comparing non-breeding distribution and behavior of red-legged kittiwakes from two geographically distant colonies

PLoS ONE ◽  
2021 ◽  
Vol 16 (7) ◽  
pp. e0254686
Author(s):  
Brie A. Drummond ◽  
Rachael A. Orben ◽  
Aaron M. Christ ◽  
Abram B. Fleishman ◽  
Heather M. Renner ◽  
...  
Keyword(s):  
Bering Sea ◽  
Activity Patterns ◽  
Small Population ◽  
Kuril Islands ◽  
Aleutian Islands ◽  
Late Winter ◽  
Breeding Period ◽  
Breeding Populations ◽  
The Kuril Islands ◽  
Migratory Strategies

Knowledge of non-breeding distributions is a crucial component to seabird conservation, as conditions during the non-breeding period can play an important role in regulating seabird populations. Specifically, if seabirds from different colonies share the same wintering grounds, conditions in that shared region could have a widespread impact on multiple breeding populations. Red-legged kittiwakes (Rissa brevirostris) are endemic to the Bering Sea and may be especially susceptible to effects of climate change due to a restricted breeding range, small population size, and specialized diet. To examine whether red-legged kittiwakes from different breeding colonies overlapped in winter distribution and activity patterns, we used geolocation loggers to simultaneously track individuals from the two largest red-legged kittiwake breeding colonies in Alaska (separated by over 1000 km) during two consecutive non-breeding periods. We found that non-breeding activity patterns were generally similar between birds originating from the two colonies, but birds employed different migratory strategies during the early winter. Kittiwakes from Buldir Island in the western Aleutian Islands left the colony in September and immediately headed west, spending October through December around the Sea of Okhotsk and the Kuril Islands. In contrast, birds from St. George Island in the Pribilof Islands remained in the eastern Bering Sea or around the eastern Aleutian Islands for a couple months before traveling farther west. During late winter however, from January through March, birds from both colonies converged south of Kamchatka and east of the Kuril Islands over the Kuril-Kamchatka Trench and in the Western Subarctic Gyre before returning to their respective colonies in the spring. This late winter overlap in distributions along the Kuril-Kamchatka Trench suggests the region is a winter hotspot for red-legged kittiwakes and highlights the importance of this region for the global kittiwake population.

Distribution and movements of white foxes in northern and western Alaska

1968 ◽  
Vol 46 (5) ◽  
pp. 849-854 ◽  
Author(s):  
David L. Chesemore
Keyword(s):  
Sea Ice ◽  
Bering Sea ◽  
Early Spring ◽  
Aleutian Islands ◽  
Late Winter ◽  
Seasonal Movements ◽  
Alaskan Arctic ◽  
Northern Alaska ◽  
The Bering Sea

White foxes occur on the tundra of northern and western Alaska and predominate on St. Lawrence, St. Matthew, Hall, and Diomede Islands in the Bering Sea. Few white foxes are found on the Pribilof and Aleutian Islands where blue foxes dominate the local fox population. On the Alaskan Arctic Slope, two seasonal movements, the first in the fall when foxes move seaward towards the coast and sea ice, and the second in late winter and early spring when they return inland to occupy summer den sites, occur. Although reported in other arctic areas, no definite records of fox migrations in northern Alaska exist. Distribution records for white foxes in Alaska are summarized.

scholarly journals Seasonal distribution of short-tailed shearwaters and their prey in the Bering and Chukchi Seas

2015 ◽  
Vol 12 (21) ◽  
pp. 17721-17750 ◽  
Author(s):  
B. Nishizawa ◽  
K. Matsuno ◽  
E. A. Labunski ◽  
K. J. Kuletz ◽  
A. Yamaguchi ◽  
...  
Keyword(s):  
Bering Sea ◽  
Chukchi Sea ◽  
Seasonal Pattern ◽  
Marine Ecosystem ◽  
Aleutian Islands ◽  
The Arctic ◽  
Breeding Period ◽  
Bering Strait ◽  
Top Predators ◽  
The Pacific

Abstract. Short-tailed shearwater Puffinus tenuirostris is one the of abundant marine top predators in the Pacific; this seabird spend its non-breeding period in the northern North Pacific during May–September and many visit the southern Chukchi Sea in July–September. We examined factors affecting this seasonal pattern of distribution by counting short-tailed shearwaters from boats. Their main prey, krill was sampled by NORPAC net in the southeastern Bering Sea/Aleutian Islands and in the Bering Strait/southern Chukchi Sea. Short-tailed shearwaters mainly distributed in the southeastern Bering Sea/Aleutian Islands (60 ± 473 birds km−2) in summer (July) but in the Bering Strait/southern Chukchi Sea (19 ± 91 birds km−2) in fall (September). In the Bering Strait/southern Chukchi Sea size of krill was greater in fall (9.6 ± 5.0 mm in total length) than in summer (1.9 ± 1.2 mm). Within the Bering Strait/southern Chukchi Sea in fall, short-tailed shearwaters occurred more frequently in cells (50 km × 50 km) where large krill was more abundant. Our results suggest that the seasonal northward movement of short-tailed shearwaters could be associated with the seasonal increase of large krill in the Bering Strait/southern Chukchi Sea. This study substantiates the importance of krill, which is advected from the Pacific, as a prey of top predators in the Arctic marine ecosystem.

scholarly journals Seasonal distribution of short-tailed shearwaters and their prey in the Bering and Chukchi seas

2017 ◽  
Vol 14 (1) ◽  
pp. 203-214 ◽  
Author(s):  
Bungo Nishizawa ◽  
Kohei Matsuno ◽  
Elizabeth A. Labunski ◽  
Kathy J. Kuletz ◽  
Atsushi Yamaguchi ◽  
...  
Keyword(s):  
Bering Sea ◽  
Chukchi Sea ◽  
Marine Ecosystem ◽  
Seasonal Distribution ◽  
Aleutian Islands ◽  
The Arctic ◽  
Breeding Period ◽  
Bering Strait ◽  
Top Predators ◽  
The Pacific

Abstract. The short-tailed shearwater (Ardenna tenuirostris) is one of the abundant marine top predators in the Pacific; this seabird spends its non-breeding period in the northern North Pacific during May–October and many visit the southern Chukchi Sea in August–September. We examined potential factors affecting this seasonal pattern of distribution by counting short-tailed shearwaters from boats. Their main prey, krill, was sampled by net tows in the southeastern Bering Sea/Aleutian Islands and in the Bering Strait/southern Chukchi Sea. Short-tailed shearwaters were mainly distributed in the southeastern Bering Sea/Aleutian Islands (60 ± 473 birds km−2) in July 2013, and in the Bering Strait/southern Chukchi Sea (19 ± 91 birds km−2) in September 2012. In the Bering Strait/southern Chukchi Sea, krill size was greater in September 2012 (9.6 ± 5.0 mm in total length) than in July 2013 (1.9 ± 1.2 mm). Within the Bering Strait/southern Chukchi Sea in September 2012, short-tailed shearwaters occurred more frequently in cells (50  ×  50 km) where large-sized krill were more abundant. These findings, and information previously collected in other studies, suggest that the seasonal northward movement of short-tailed shearwaters might be associated with the seasonal increase in krill size in the Bering Strait/southern Chukchi Sea. We could not, however, rule out the possibility that large interannual variation in krill abundance might influence the seasonal distribution of shearwaters. This study highlights the importance of krill, which is advected from the Pacific, as an important prey of top predators in the Arctic marine ecosystem.

First data on Sciomyzidae (Diptera) of Iturup Island (Kuril Islands)

2016 ◽  
Vol 25 (2) ◽  
pp. 387-395 ◽  
Author(s):  
A.A. Przhiboro
Keyword(s):  
Kuril Islands ◽  
Diagnostic Characters ◽  
Iturup Island ◽  
The Kuril Islands ◽  
First Time

The first data are presented about the Sciomyzidae of Iturup, the largest of the Kuril Islands. A total of ten species are recorded. Limnia setosa Yano is recorded for the first time from Russia; Tetanocera montana Day and T. phyllophora Melander are recorded for the first time from the Kuril Islands. Photographs, comments on diagnostic characters and adult habitats of poorly known species are given.

Psyllids of the Kuril Islands (Homoptera, Psylloidea)

2006 ◽  
Vol 15 (1) ◽  
pp. 51-55
Author(s):  
E.S. Labina
Keyword(s):  
Kuril Islands ◽  
The Kuril Islands ◽  
Faunal List ◽  
First Time

A faunal list of Psylloidea of the Kuril Islands is given. Of the 34 species reported, 17 are new to the fauna of the archipelago and some are recorded for the first time from particular islands, especially from Northern and Middle Kurils and Shikotan.

scholarly journals Description of a New Species of Guillemot from the Kuril Islands

The Auk ◽  
1897 ◽  
Vol 14 (2) ◽  
pp. 200-201 ◽  
Author(s):  
Leonhard Stejneger
Keyword(s):  
New Species ◽  
Kuril Islands ◽  
The Kuril Islands ◽  
A New Species

scholarly journals PACIFIC COD OF THE KURIL ISLANDS: STOCK AND CONTEMPORARY FISHING

Fisheries ◽  
2020 ◽  
Vol 2020 (4) ◽  
pp. 44-51
Author(s):  
Aleksandr Zolotov ◽  
Nikolay Antonov ◽  
Olga Maznikova
Keyword(s):  
Kuril Islands ◽  
Pacific Cod ◽  
The North ◽  
Trawl Fishing ◽  
Northern Kuril Islands ◽  
The Kuril Islands ◽  
High Level ◽  
North And South ◽  
South Kuril Islands

The paper analyzes the long-term dynamics of stocks and annual catches of Pacific cod of the Kuril Islands, and also considers the structure of its modern fishery, taking into account the changes that have occurred in the organization of its coastal fishing in recent years. It was shown that the dynamics of commercial biomass of Pacific cod in the Northern and Southern Kuril Islands is comparable to that in 1975-2020 for groups in the southeastern part of the Bering Sea, the Karagin and Olyutor bays, on the shelf of Western Kamchatka, and in south-western Sakhalin. Development of the cod fishery in the North and South Kuril Islands in 1980-2019 went in accordance with the dynamics of stocks, the maximum catches were observed during the period of a high level of abundance of both groups in the 1980s. While the structure of the cod fishery on the shelf of the Northern Kuril Islands to date can be considered established, the development of fishing in the South Kuril Islands in the last two decades went by the gradual replacement of trawl fishing in the winter-spring period with snorkeling in the summer season.

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