Queen Charlotte Islands caribou

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Dawson's caribou
Caribou dans la taiga.jpg
A mature bull woodland caribou.
Status iucn3.1 EX.svg
Extinct  (1908)  (IUCN 3.1) [1]
Status TNC TX.svg
Presumed Extinct  (1908)  (NatureServe) [2]
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Family: Cervidae
Subfamily: Capreolinae
Genus: Rangifer
Species:
Subspecies:
R. t. dawsoni
Trinomial name
Rangifer tarandus dawsoni
(Seton, 1900)
Rangifer tarandus Map NA.svg
Approximate range of subspecies of Rangifer tarandus. Overlap with other subspecies of caribou is possible for contiguous range. 1.R. t. caribou, which is subdivided into ecotypes: woodland (boreal), woodland (migratory) and woodland (mountain), 2.R. t. dawsoni (extinct 1908), 3. R. t. granti, 4. R. t. groenlandicus, 5. R. t. groenlandicus/pearyi, 6.R. t. pearyi

The Dawson's caribou, also known as the Queen Charlotte Islands caribou (Rangifer tarandus dawsoni) was a population of woodland caribou that once lived on Graham Island, the largest of the islands within the Haida Gwaii archipelago, located off the coast of British Columbia, Canada. [3]

Contents

Description

An inland wetland on Graham Island. Haida Gwaii (Queen Charlotte Islands) - Graham Island - (21534557386).jpg
An inland wetland on Graham Island.

Discovery

The Haida Gwaii archipelago has been inhabited by indigenous people for thousands of years. Despite this, it is not reported that the indigenous population had much, if any, knowledge of the caribou, likely due to the two inhabiting different parts of Graham Island. [4] The first known written record of the Dawson's caribou came from George Mercer Dawson, a member of the Geological Survey of Canada, who mentioned the animal in a 1878 report on the islands, initially mistaking it for a type of elk. [4] Dawson eventually brought news of the caribou to Ernest Thompson Seton, an author and wildlife artist, who officially described the animal in 1900 and named it in Dawson's honour. [5]

Appearance

The subject of the coat colour of the Dawson's caribou is a matter of some contention. While often described as pale with few to no markings, which would be typical of an insular ungulate, [3] this description is likely based on aged museum skins, as the remains of recently killed individuals photographed in 1908 appear darker in colour. [6]

The Dawson's caribou is also described as smaller than its mainland counterpart, which is likely due to insular dwarfism, another trait common in insular ungulates. [7]

Some sources report both sexes as having antlers, [6] while others state females were antlerless. In both cases, the antlers themselves are described as reduced in size, in comparison to mainland caribou, and remarkably abnormal in shape. [3]

Ecology

The Dawson's caribou was the largest herbivorous land mammal native to the Haida Gwaii archipelago. [8] They were said to only be found on the plateau around Virago Sound, located in the north of the island, [6] inhabiting muskegs and open woodland. [3]

The only carnivore the caribou would have had to contend with would have been the Haida Gwaii black bear, which still survives on the islands today. [8]

Genetics

Once thought to represent a unique subspecies of woodland caribou, a 2002 study that analysed mtDNA found Dawson's caribou to not be genetically distinct from the subspecies on the Canadian mainland. [3]

Extirpation

A black-tailed deer on Graham Island. Haida Gwaii (Queen Charlotte Islands) - Graham Island - a few hikes around the N end of Naikoon Provincial Park - the unbiquitos Sitka Black-Tailed Deer (Odocoileus hemionus sitkensis) - (21561995305).jpg
A black-tailed deer on Graham Island.

Given the small size and isolation of the Dawson's caribou population, even minor changes in their environment could have presented considerable pressure to their continued survival. [9]

The introduction of black-tailed deer to Graham Island took place on multiple occasions between 1878 and 1925, [10] and could have potentially played a role in the caribou's demise through competition for resources and the spread of disease. Clearcutting was occurring on the island around this time as well, and along with providing further feeding opportunities for the introduced black-tailed deer, which in turn helped bolster their numbers, [10] it's possible the destruction of woodland negatively affected the caribou directly via habitat loss.

Dawson's caribou were hunted by both indigenous people and European settlers for their pelts, as part of the fur trade, [4] which presented another threat to the population.

The last definite sighting of a live Dawson's caribou occurred on November 1, 1908 when a small group was observed, this included a pair of adult bulls, one cow and a calf. All three adult animals were shot and killed, [11] and their remains, one of which represents the only mounted specimen known to exist, now reside in the collection of the Royal BC Museum in Victoria. [12]

While caribou tracks were discovered as recently as 1935, [6] the exact age of the hoof prints is not known, and it's likely the population was fully extirpated by the end of the decade, if not earlier. [3]

Related Research Articles

<span class="mw-page-title-main">Reindeer</span> Species of deer

The reindeer or caribou is a species of deer with circumpolar distribution, native to Arctic, subarctic, tundra, boreal, and mountainous regions of Northern Europe, Siberia, and North America. It is the only representative of the genus Rangifer. More recent studies suggest the splitting of reindeer and caribou into six distinct species over their range.

<span class="mw-page-title-main">Haida Gwaii</span> Archipelago in British Columbia, Canada

Haida Gwaii, formerly known as the Queen Charlotte Islands, is an archipelago located between 55–125 km (34–78 mi) off the northern Pacific coast of Canada. The islands are separated from the mainland to the east by the shallow Hecate Strait. Queen Charlotte Sound lies to the south, with Vancouver Island beyond. To the north, the disputed Dixon Entrance separates Haida Gwaii from the Alexander Archipelago in the U.S. state of Alaska.

<span class="mw-page-title-main">Ecotype</span> Classification of distinct populations lesser than subspecies

In evolutionary ecology, an ecotype, sometimes called ecospecies, describes a genetically distinct geographic variety, population, or race within a species, which is genotypically adapted to specific environmental conditions.

<span class="mw-page-title-main">Migratory woodland caribou</span> Subspecies of deer

The migratory woodland caribou refers to two herds of Rangifer tarandus that are included in the migratory woodland ecotype of the subspecies Rangifer tarandus caribou or woodland caribou that live in Nunavik, Quebec, and Labrador: the Leaf River caribou herd (LRCH) and the George River caribou herd (GRCH) south of Ungava Bay. Rangifer tarandus caribou is further divided into three ecotypes: the migratory barren-ground ecotype, the mountain ecotype or woodland (montane) and the forest-dwelling ecotype. According to researchers, the "George River herd which morphologically and genetically belong to the woodland caribou subspecies, at one time represented the largest caribou herd in the world and migrating thousands of kilometers from boreal forest to open tundra, where most females calve within a three-week period. This behaviour is more like barren-ground caribou subspecies." They argued that "understanding ecotype in relation to existing ecological constraints and releases may be more important than the taxonomic relationships between populations." The migratory George River caribou herd travel thousands of kilometres moving from wintering grounds to calving grounds near the Inuit hamlet of Kangiqsualujjuaq, Nunavik. In Nunavik and Labrador, the caribou population varies considerably with their numbers peaking in the later decades of each of the 18th, 19th and 20th centuries. In 1984, about 10,000 caribou of the George River herd drowned during their bi-annual crossing of the Caniapiscau River during the James Bay Hydro Project flooding operation. The most recent decline at the turn of the 20th century caused much hardship for the Inuit and Cree communities of Nunavik, who hunt them for subsistence.

<span class="mw-page-title-main">Porcupine caribou</span> Subspecies of deer

The Porcupine caribou(Rangifer tarandus groenlandicus) is a herd or ecotype of barren-ground caribou, the subspecies of the reindeer or caribou found in Alaska, United States, and Yukon and the Northwest Territories, Canada.

Pink Mountain Provincial Park is a provincial park in British Columbia, Canada.

<span class="mw-page-title-main">British Columbia mainland coastal forests</span> Temperate coniferous forest ecoregion in British Columbia, Canada and Washington, United States

British Columbia mainland coastal forests is a temperate coniferous forest ecoregion the Pacific coast of North America, as defined by the World Wildlife Fund (WWF) categorization system.

Dawson's may refer to:

<span class="mw-page-title-main">Peary caribou</span> Subspecies of deer

The Peary caribou is a subspecies of caribou found in the High Arctic islands of Nunavut and the Northwest Territories in Canada. They are the smallest of the North American caribou, with the females weighing an average of 60 kg (130 lb) and the males 110 kg (240 lb). In length the females average 1.4 m and the males 1.7 m.

<span class="mw-page-title-main">Barren-ground caribou</span> Subspecies of deer

The barren-ground caribou is a subspecies of the reindeer that is found in the Canadian territories of Nunavut and the Northwest Territories, in northern Alaska and in south-western, Greenland. It includes the Porcupine caribou of Yukon and Alaska. The barren-ground caribou is a medium-sized caribou, smaller and lighter-colored than the boreal woodland caribou, with the females weighing around 90 kg (200 lb) and the males around 150 kg (330 lb). However, on some of the smaller islands, the average weight may be less. The large migratory herds of barren-ground caribou take their names from the traditional calving grounds, such as the Ahiak herd, the Baffin Island herds, the Bathurst herd, the Beverly herd, the Bluenose East herd, the Bluenose West herd, the Porcupine herd and the Qamanirjuaq herd.

<span class="mw-page-title-main">Reindeer hunting in Greenland</span> The practice of hunting reindeer for their meat, fur, and antlers in Greenland

Reindeer hunting in Greenland is of great importance to the Greenlandic Inuit and sports hunters, both residents and tourists. Reindeer (caribou) are an important source of meat, and harvesting them has always played an important role in the history, culture, and traditions of the Greenlandic Inuit. Controlled hunting is important for the welfare of reindeer, the quality of life for Inuit, both as food, and part of their culture and Greenlandic culture in general, and the preservation of tundra grazing areas. Therefore, scientific research is regularly performed to determine the quotas needed to maintain a proper ecological balance.

<i>Ursus americanus carlottae</i> Subspecies of carnivore

The Haida Gwaii black bear, also known as the Queen Charlotte Islands black bear, is a morphologically distinct subspecies of the American black bear.

<span class="mw-page-title-main">Finnish forest reindeer</span> Subspecies of deer

The Finnish forest reindeer(Rangifer fennicus fennicus, also known as Eurasian or European forest reindeer is a rare subspecies of the reindeer native to Finland and northwestern Russia. They are found primarily in Russian Karelia and the provinces of North Karelia, Savonia and Kainuu in Finland, though some range into central south Finland. They are distinct from the semi-domesticated mountain reindeer in their larger size, longer legs and preference for dense boreal forest habitat, where they are rarely seen by humans, over the open tundra. The Finnish herd migrates seasonally back and forth across the long Russo-Finnish border.

<span class="mw-page-title-main">Svalbard reindeer</span> Species of deer

The Svalbard reindeer is a small subspecies or species of reindeer found on the Svalbard archipelago of Norway. Males average 65–90 kg (143–198 lb) in weight, females 53–70 kg (117–154 lb), while for other reindeer generally body mass is 159–182 kg (351–401 lb) for males and 80–120 kg (180–260 lb) for females.

<span class="mw-page-title-main">Boreal woodland caribou</span> Subspecies of caribou or reindeer in North America

The boreal woodland caribou, also known as Eastern woodland caribou, boreal forest caribou and forest-dwelling caribou, is a North American subspecies of reindeer found primarily in Canada with small populations in the United States. Unlike the Porcupine caribou and barren-ground caribou, boreal woodland caribou are primarily sedentary.

<span class="mw-page-title-main">Dolphin-Union caribou</span> Migratory population of caribou

Dolphin and Union Caribou, Dolphin and Union caribou herd, Dolphin-Union, locally known as Island Caribou, are a migratory population of barren-ground caribou, Rangifer tarandus groenlandicus, that occupy Victoria Island in the Canadian Arctic Archipelago and the nearby mainland. They are endemic to Canada. They migrate across the Dolphin and Union Strait from their summer grazing on Victoria Island to their winter grazing area on the Nunavut-Northwest Territories mainland in Canada. It is unusual for North American caribou to seasonally cross sea ice and the only other caribou to do so are the Peary caribou who are smaller in size and population. They were listed as Endangered by Committee on the Status of Endangered Wildlife in Canada (COSEWIC) since November 2017.

The Arctic reindeer, properly known as the East Greenland caribou, was a subspecies of the reindeer that once lived in eastern Greenland. It has been extinct since 1900.

Caribou herds in Canada are discrete populations of seven subspecies that are represented in Canada. Caribou can be found from the High Arctic region south to the boreal forest and Rocky Mountains and from the east to the west coasts.

<span class="mw-page-title-main">Reindeer distribution</span> Reindeer distribution around the world

The reindeer is a widespread and numerous species in the northern Holarctic, being present in both tundra and taiga. Originally, the reindeer was found in Scandinavia, eastern Europe, Russia, Mongolia, and northern China north of the 50th latitude. In North America, it was found in Canada, Alaska, and the northern contiguous USA from Washington to Maine. In the 19th century, it was apparently still present in southern Idaho. It also occurred naturally on Sakhalin, Greenland, and probably even in historical times in Ireland.

<span class="mw-page-title-main">Haida ermine</span> Species of carnivore

The Haida ermine is a mustelid species endemic to a few islands off the Pacific Northwest of North America, namely Haida Gwaii in Canada and the southern Alexander Archipelago in the U.S. state of Alaska.

References

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  2. "NatureServe Explorer 2.0". explorer.natureserve.org. Retrieved 30 March 2022.
  3. 1 2 3 4 5 6 Byun, S.A.; B.F. Koop, and T.E. Reimchen. (2002). Evolution of the Dawson caribou (Rangifer tarandus dawsoni). Can. J. Zool. 80(5): 956–960. doi : 10.1139/z02-062. NRC Canada.
  4. 1 2 3 Day, David (1989). Vanished Animals. Gallery Books. p. 196. ISBN   978-0-8317-2782-6.
  5. Mathewes, Rolf W.; Richards, Michael; Reimchen, Thomas E. (June 2019). "Late Pleistocene age, size, and paleoenvironment of a caribou antler from Haida Gwaii, British Columbia". Canadian Journal of Earth Sciences. 56 (6): 688–692. Bibcode:2019CaJES..56..688M. doi:10.1139/cjes-2018-0246. ISSN   0008-4077. S2CID   135409724.
  6. 1 2 3 4 "100 Objects of Interest". Royal BC Museum. Archived from the original on December 2, 2021.
  7. Harding, Lee E. (2022-08-26). "Available names for Rangifer (Mammalia, Artiodactyla, Cervidae) species and subspecies". ZooKeys (1119): 117–151. Bibcode:2022ZooK.1119..117H. doi: 10.3897/zookeys.1119.80233 . ISSN   1313-2970. PMC   9848878 . PMID   36762356.
  8. 1 2 "Wildlife of Haida Gwaii: Canada's Galapagos". 2023-04-07. Retrieved 2023-08-16.
  9. "8.7: Problems of Small Populations". Biology LibreTexts. 2019-12-07. Retrieved 2023-08-16.
  10. 1 2 Magazine, Hakai. "Deer Wars: The Forest Awakens". Hakai Magazine. Retrieved 2023-08-16.
  11. Day, David (1989). Vanished Animals. Gallery Books. p. 198. ISBN   978-0-8317-2782-6.
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