Diet Of Peary Caribou, Banks Island, N.W.T.

Shank, Christopher C.; Wilkinson, Paul; Penner, David F.

doi:10.14430/arctic2647

Cited by 17 publications

(11 citation statements)

References 5 publications

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“…The lack of lichen in the diet was consistent with previous findings (Shank et al, 1978), and is likely related to low availability. Lattet & Nagy (1996) found similar percenrages of lichen in the rumen contents and faecal material of mainland barrenground caribou during wintet indicating that the proportion of lichen in the diet, determined from the analyses of faecal plant fragments, was not significantly influenced by high lichen digestibility during winter.…”

Section: Resultssupporting

confidence: 91%

“…The occurrence of willow in both the wintet (March) and summer (August) diets of muskoxen in the high density area was 2-3 times greater than that found by Wilkinson et al (1976) and Shank et al (1978) in the 1970's. This difference cannot be attributed to the difference in technique used to determine diet.…”

Section: Resultsmentioning

confidence: 64%

“…This difference cannot be attributed to the difference in technique used to determine diet. The macroscopic technique used by Wilkinson et al (1976) and Shank et al (1978) is more likely ro overestimate willow than the microscopic technique we used, because willow patticles are generally larger than those of other forages and are easily identifiable. Whether or not increased dietary willow is related to a decrease in sedge availability or an increase in willow availability is unknown.…”

Section: Resultsmentioning

confidence: 86%

“…Although Wilkinson et al (1976) and Shank et al (1978) (Wilkinson et al, 1976;Shank et al, 1978), was noticeably absent in the 1990's. Rose/saxifrage, legumes, and other forbs 14 appear to have teplaced this component of the diet.…”

Section: Resultsmentioning

confidence: 99%

“…2). There was a high percent similarity (PS>89) of muskox diets between high and low density areas with the exception of a larger proportion of willow in the June and legume in the July diet in the high density area which reduced PS to 52 and 76, respectively ( Island (Wilkinson et al, 1976;Shank et al, 1978) and the Patty Islands (Patker, 1978 Rangifer, 17 (1), 1997…”

Section: Resultsmentioning

confidence: 99%

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Peary caribou, muskoxen and Banks Island forage: Assessing seasonal diet similarities

Larter¹,

Nagy²

1997

Ran

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Peary caribou (Rangifer tarandus pearyi) and muskoxen {Ovibos moschatus) on Banks Island had considerable similarity in their annual diets, with monthly similarities ranging from 17.8-73.3%. Diet similarity was more pronounced in areas of high muskox density {ca. 1.65/km 2 ) than in areas of low muskox density {ca. 0.4/km 2 ). Willow (Salix arctka) and sedge (Carex aquatilis and Eriophorum spp.) represented >80% of the monthly diet of muskoxen. The caribou diet was more diverse, and was dominated by sedge, willow, Dryas integrifolia, and Oxytropis maydelliana, Lichen use was rare, likely as a consequence of low availability on Banks Island. Lichen standing crop was estimated at 2.96 g/m 2 . The differences in muskox diet between high and low density areas could not be explained by differences in forage distribution or standing crop. We discuss diet similarities of caribou and muskoxen and potential consequences for the current Peary caribou population in relation to winter weather conditions and increasing muskox density.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 64%

Section: Resultsmentioning

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Peary caribou, muskoxen and Banks Island forage: Assessing seasonal diet similarities

Larter¹,

Nagy²

1997

Ran

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Investigating potential for competition between migratory caribou and introduced muskoxen

et al. 2023

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Several caribou (Rangifer tarandus) populations co‐occur with endemic or introduced populations of muskoxen (Ovibos moschatus), which has led to concerns about the potential competition between the species, especially in regions where the growth of muskoxen populations coincides with caribou declines. We evaluated the potential for competition between migratory caribou and an introduced muskoxen population in northern Québec, Canada, at multiple spatial scales, from 2017 to 2019. We investigated space use and habitat selection patterns of satellite‐collared caribou and muskoxen, and analyzed fecal samples using DNA metabarcoding to assess diet overlap. Annual overlap between ranges was low and occurred primarily during caribou spring migrations on the coast of Hudson Bay, and during summer on the coast of Ungava Bay. During spring, muskoxen selected shrub‐dominated areas close to the coast, whereas caribou selected rock‐substrate tundra and low elevations within their overlapping ranges. Thus, co‐occurrence was low and remained limited to the vicinity of the Hudson Bay. In summer, muskoxen selected productive coastal areas and caribou selected erect‐shrub tundra; both species selected prostrate‐shrub tundra. This led to a higher co‐occurrence in the Ungava Bay study area relative to the Hudson Bay study area. We found similarities in the diets of the 2 species at the plant family level, with shrubs being commonly consumed by both species across seasons. We conclude that, at a broad spatial scale, there was limited potential for seasonal space use and diet overlap between caribou and muskoxen in our study area. Still, multiple sources of uncertainty remain such as local impacts of herbivory by muskoxen, demographic and distribution patterns of both species, trophic interactions with predators, shared diseases and parasites, and climate change. These sources of uncertainty could be mitigated through the elaboration of local management plans and community‐based monitoring.

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Intra‐individual variation in stable carbon (δ¹³C) and nitrogen (δ¹⁵N) isotopes in mandibles of modern caribou of Qamanirjuaq (Rangifer tarandus groenlandicus) and Banks Island (Rangifer tarandus pearyi): Implications for tracing seasonal and temporal changes in diet

Drucker

Hobson

Münzel

et al. 2010

Intl J of Osteoarchaeology

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Intra-individual variations in carbon (d 13 C) and nitrogen (d 15 N) isotope measurements of dentine collagen in ungulate teeth can be related to diet and environmental changes at different periods during the life of the animal. A protocol of serial sampling of first, second and third molar roots was applied to modern caribou (17-27 months old) of the Qamanirjuaq herd (Rangifer tarandus groenlandicus), Canada. Based on a previous study, we predicted that M2 would reflect winter, M3 summer and M1 a complete year in terms of the isotopic record. Relatively high d15 N values (ca. 6 to 8%), previously attributed to winter stress, were found in different molars of different specimens, reflecting a period of growth between April 1966 to April 1967. Previous results on other teeth from the same population confirmed that a high d 15 N coll value signal corresponded to the winter of 1966/67. This temporary increase in d 15 N value was probably linked to diet and/or environmental change. Collagen from M1 reflects the first winter whereas M2 and M3 reflect the second winter of life of young caribou. A longer time record including summer is represented by the bone collagen of the mandible. Results obtained on molar roots and mandible bone of the modern caribou of Banks Island herd (Rangifer tarandus pearyi) confirmed this seasonal record. Such collagen isotopic analysis on M1, M2 and M3 roots and jawbone can be applied to reindeer found in archaeological sites. Mandibles retaining deciduous premolars are preferable to avoid the possible loss of the winter tooth signal observed in animals older than 2 years.

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Diet Of Peary Caribou, Banks Island, N.W.T.

Cited by 17 publications

References 5 publications

Peary caribou, muskoxen and Banks Island forage: Assessing seasonal diet similarities

Peary caribou, muskoxen and Banks Island forage: Assessing seasonal diet similarities

Investigating potential for competition between migratory caribou and introduced muskoxen

Intra‐individual variation in stable carbon (δ¹³C) and nitrogen (δ¹⁵N) isotopes in mandibles of modern caribou of Qamanirjuaq (Rangifer tarandus groenlandicus) and Banks Island (Rangifer tarandus pearyi): Implications for tracing seasonal and temporal changes in diet

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Diet Of Peary Caribou, Banks Island, N.W.T.

Cited by 17 publications

References 5 publications

Peary caribou, muskoxen and Banks Island forage: Assessing seasonal diet similarities

Peary caribou, muskoxen and Banks Island forage: Assessing seasonal diet similarities

Investigating potential for competition between migratory caribou and introduced muskoxen

Intra‐individual variation in stable carbon (δ13C) and nitrogen (δ15N) isotopes in mandibles of modern caribou of Qamanirjuaq (Rangifer tarandus groenlandicus) and Banks Island (Rangifer tarandus pearyi): Implications for tracing seasonal and temporal changes in diet

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Intra‐individual variation in stable carbon (δ¹³C) and nitrogen (δ¹⁵N) isotopes in mandibles of modern caribou of Qamanirjuaq (Rangifer tarandus groenlandicus) and Banks Island (Rangifer tarandus pearyi): Implications for tracing seasonal and temporal changes in diet