scholarly journals Sea Otter, Enhydra lutris, Sightings off Haida Gwaii / Queen Charlotte Islands, British Columbia, 1972-2002

2004 ◽  
Vol 118 (2) ◽  
pp. 270
Author(s):  
Kimberly Raum-Suryan ◽  
Kenneth Pitcher ◽  
Richard Lamy
Keyword(s):  
British Columbia ◽  
Steller Sea Lion ◽  
Sea Otter ◽  
Eumetopias Jubatus ◽  
Enhydra Lutris ◽  
Haida Gwaii ◽  
Sea Lion ◽  
Sea Otters ◽  
The Past ◽  
Queen Charlotte Islands

On 27 June 2001 we observed and photographed a Sea Otter (Enhydra lutris) adjacent to a Steller Sea Lion (Eumetopias jubatus) haulout near Sgang Gwaay (Anthony Island), Haida Gwaii / Queen Charlotte Islands. This is one of only eight documented sightings of Sea Otters in these waters during the past 30 years. These sightings may represent the beginning of the expansion of Sea Otters to their former range off Haida Gwaii.

scholarly journals The historical and contemporary status of the sea otter Enhydra lutris population on Urup Island, southern Kuril Islands

Oryx ◽  
2021 ◽  
pp. 1-6
Author(s):  
Igor Popov ◽  
Alexey Scopin
Keyword(s):  
Total Population ◽  
Kuril Islands ◽  
Sea Otter ◽  
Enhydra Lutris ◽  
Sea Otters ◽  
The Past ◽  
Remote Island ◽  
Contemporary Status ◽  
Wildlife Refuges ◽  
Effective Conservation

Abstract We describe the population of the Еndangered sea otter Enhydra lutris on Urup Island, one of the main wildlife refuges in the southern Kuril Islands of Russia. We reviewed historical and local reports of the sea otter, identified its habitat around the island, and surveyed the coastal waters of the island in 2019. Sea otters were numerous on Urup Island in the past but were hunted excessively and almost exterminated by the 1950s. Since then, sea otter populations have increased, and as the island is almost uninhabited we expected otters to be numerous. This was not the case, and we estimated the total population to be 363 ± SE 126 individuals. Our observation of two skinned carcasses on the shore suggests the low numbers are a result of poaching for the illegal fur trade. The case of Urup Island demonstrates that sea otters require active conservation, as even on a remote island they remain threatened. Establishment of protected areas would be an effective conservation measure for this species, although the suppression of demand for sea otter fur is of the greatest importance.

scholarly journals Archaeological mitogenomes illuminate the historical ecology of sea otters ( Enhydra lutris ) and the viability of reintroduction

2020 ◽  
Vol 287 (1940) ◽  
pp. 20202343
Author(s):  
Hannah P. Wellman ◽  
Rita M. Austin ◽  
Nihan D. Dagtas ◽  
Madonna L. Moss ◽  
Torben C. Rick ◽  
...  
Keyword(s):  
British Columbia ◽  
Ancient Dna ◽  
Historical Ecology ◽  
Mitochondrial Genomes ◽  
Sea Otter ◽  
Enhydra Lutris ◽  
Dental Calculus ◽  
Sea Otters ◽  
Dna Analyses ◽  
Modern Context

Genetic analyses are an important contribution to wildlife reintroductions, particularly in the modern context of extirpations and ecological destruction. To address the complex historical ecology of the sea otter ( Enhydra lutris ) and its failed 1970s reintroduction to coastal Oregon, we compared mitochondrial genomes of pre-extirpation Oregon sea otters to extant and historical populations across the range. We sequenced, to our knowledge, the first complete ancient mitogenomes from archaeological Oregon sea otter dentine and historical sea otter dental calculus. Archaeological Oregon sea otters ( n = 20) represent 10 haplotypes, which cluster with haplotypes from Alaska, Washington and British Columbia, and exhibit a clear division from California haplotypes. Our results suggest that extant northern populations are appropriate for future reintroduction efforts. This project demonstrates the feasibility of mitogenome capture and sequencing from non-human dental calculus and the diverse applications of ancient DNA analyses to pressing ecological and conservation topics and the management of at-risk/extirpated species.

scholarly journals Geoduck Clam (Panopea Abrupta) Demographics and Mortality Rates in the Presence of Sea Otters (Enhydra Lutris) and Commercial Harvesting

2013 ◽  
Vol 6 (1) ◽  
pp. 28-40 ◽  
Author(s):  
Rhonda D. Reidy ◽  
Sean P. Cox
Keyword(s):  
British Columbia ◽  
Strong Association ◽  
Total Mortality ◽  
Mortality Rates ◽  
Sea Otter ◽  
Commercial Fishery ◽  
Enhydra Lutris ◽  
Sea Otters ◽  
Population Demographics ◽  
Commercial Harvesting

In British Columbia, expanding sea otter (Enhydra lutris) populations are creating concerns among commercial harvesters about the potential predation impacts on exploitable geoduck clam (Panopea abrupta) stocks. We analysed fishery-independent surveys of exploited geoduck clam populations along a gradient of sea otter occupancy on the west coast of Vancouver Island, British Columbia, Canada to assess relationships between otter presence, commercial fishery removals of geoduck, and geoduck population demographics. Geoduck mean density, age composition, and estimated total mortality were influenced by a combination of variables, and therefore, we could not differentiate among geoduck populations according to sea otter presence or absence alone. As expected, we found a strong association between commercial fishery removals and geoduck clam total mortality rates. In contrast, the local numbers of sea otters were not an important factor affecting geoduck total mortality. A more balanced study design and greater sampling intensity would increase the power to detect whether sea otter predation affects harvestable geoduck stocks. Also, knowledge of the consumption rate by sea otters of geoduck throughout the year, in combination with survey data of unfished geoduck populations, would facilitate better prediction of how geoduck clam mortality rates might change as sea otters re-colonise new areas.

A late Pleistocene Steller sea lion (Eumetopias jubatus) from Courtenay, British Columbia: its death, associated biota, and paleoenvironment

2004 ◽  
Vol 41 (11) ◽  
pp. 1285-1297 ◽  
Author(s):  
C R Harington ◽  
R LM Ross ◽  
R W Mathewes ◽  
K M Stewart ◽  
O Beattie
Keyword(s):  
British Columbia ◽  
Pinus Contorta ◽  
Late Glacial ◽  
Plant Macrofossils ◽  
Steller Sea Lion ◽  
Eumetopias Jubatus ◽  
Sea Lion ◽  
Radiocarbon Dates ◽  
Sea Lions ◽  
Regional Sea Level

A partial juvenile Steller sea lion (Eumetopias jubatus) skeleton from nearshore marine sands at Courtenay, Vancouver Island, British Columbia has been radiocarbon dated to 12 570 ± 70 BP. This date is supported by both stratigraphic and regional sea-level emergence data and is similar to radiocarbon dates on a Steller sea lion humerus from Bowen Island, just north of Vancouver. The juvenile apparently died from a blow to the braincase, most likely caused by a Steller sea lion bull. The Courtenay specimen is significant since very few Pleistocene otariid fossils are complete enough to be assigned to modern taxa. Associated mollusk remains indicate that the marine paleoclimate of the fossil locality was considerably colder than now — close to that along the northern reaches of Cook Inlet and Prince William Sound, Alaska. Pollen and plant macrofossils collected from the Courtenay site clearly demonstrate the presence of lodgepole pine (Pinus contorta) forests nearby during this early late-glacial interval. Fish remains (mainly Pacific cod and walleye pollock, with some salmon) from this site probably reflect selection by adult sea lions at a rookery.

scholarly journals Dermatophytosis in a Steller Sea Lion (Eumetopias jubatus).

1994 ◽  
Vol 56 (3) ◽  
pp. 551-553 ◽  
Author(s):  
Eri TANAKA ◽  
Takahiro KIMURA ◽  
Sinpei WADA ◽  
Kisio HATAI ◽  
Seizaburou SONODA
Keyword(s):  
Steller Sea Lion ◽  
Eumetopias Jubatus ◽  
Sea Lion

The British Columbia transplant of sea otters Enhydra Lutris

1981 ◽  
Vol 20 (4) ◽  
pp. 291-295 ◽  
Author(s):  
Robert Morris ◽  
Derek V. Ellis ◽  
Brian P. Emerson
Keyword(s):  
British Columbia ◽  
Enhydra Lutris ◽  
Sea Otters
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