A protostrongylid nematode (Strongylida: Protostrongylidae) in woodland caribou (<i>Rangifer tarandus caribou</i>)

Lankester, Murray W.; Crichton, Vince; Timmermann, H. R.

doi:10.1139/z76-079

Cited by 11 publications

(13 citation statements)

References 3 publications

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“…However, measurements of the first-stage larvae that Lankester et al (1976) presented (mean = 354 and 350 pm from Manitoba and Ontario respectively) are much smaller than those of E . cervi (mean = 426, see Lankester and Northcott, 1979), and are similar in length to Parelaphostrongylus spp. (see Gray et al, 1985b for comparisons).…”

Section: Discussionmentioning

confidence: 71%

“…Adult lungworms, which have dorsal-spined, first-stage larvae, have been reported only rarely from woodland caribou in North America: Parelaphostrongylus tenuis (Dougherty, 1945) from woodland caribou on a game reserve in Wisconsin (Trainer, 1973), and Elaphostrongylus cervi Cameron, 1931 from woodland caribou in Newfoundland (Lankester and Northcott, 1979). Lankester et al (1976) recovered dorsal-spined larvae from the feces of woodland caribou in Ontario and Manitoba. Although Lankester et al (1976) did not recover adult worms, they suggested that the larvae were those of E .…”

Section: Discussionmentioning

confidence: 99%

“…Lankester et al (1976) recovered dorsal-spined larvae from the feces of woodland caribou in Ontario and Manitoba. Although Lankester et al (1976) did not recover adult worms, they suggested that the larvae were those of E . cervi or a related species of nematode.…”

Section: Discussionmentioning

confidence: 99%

“…Based on the few length measurements of larvae from caribou of northeastern Alberta and those published for dorsalspined, first-stage lungworm larvae (Lankester and Northcott, 1979;Gray et al, 1985b), it is possible that E. cerui may be present in the caribou of northeastern Alberta. However, conclusive identity of the lungworm of woodland caribou from northeastern Alberta will depend upon recovery of adult worms.…”

Section: Discussionmentioning

confidence: 99%

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Parelaphostrongylus Odocoilei (Nematoda: Protostrongylidae) and a Protostrongylid Nematode in Woodland Caribou (Rangifer Tarandus Caribou) of Alberta, Canada

Gray

Samuel

1986

Journal of Wildlife Diseases

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Two size-groups of dorsal-spined, first-stage, nematode larvae were found in feces of woodland caribou, Rangifer tarandus caribou (Gmelin), in Alberta from [1976][1977][1978][1979][1980][1981][1982]. Larvae from caribou feces in northeastern Alberta were 451 ? 17 pm in length, while those from westcentral Alberta were 362 f 18 pm in length. Larvae collected from west-central Alberta developed to the infective stage, experimentally, in the terrestrial gastropod Triodopsis multilineata (Say) and were infective to captive mule deer fawns, Odocoileus h. hemfonus (Rafinesque). Adult nematodes, identified as Parelaphostrongylus odocoilei (Hobmaier and Hobmaier, 1934), were recovered from the skeletal muscles of the mule deer.

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Section: Discussionmentioning

confidence: 71%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Parelaphostrongylus Odocoilei (Nematoda: Protostrongylidae) and a Protostrongylid Nematode in Woodland Caribou (Rangifer Tarandus Caribou) of Alberta, Canada

Gray

Samuel

1986

Journal of Wildlife Diseases

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“…Peters and King (uncirculated report to the Government of Newfoundland, 1959) identified three female nematodes found beneath the skin of caribou as Elaphostrongylus sp., and Bergerud (1971) referred to nematodes in the musculature and cranium of caribou in Newfoundland as Eluphostrongylus sp, and, erroneously, Pneumostrongylus sp. (see Lankester et al 1976). It now appears probable that these authors were in fact referring to E. ceroi.…”

Section: Discussionmentioning

confidence: 97%

Elaphostrongylus cervi Cameron 1931 (Nematoda: Metastrongyloidea) in caribou (Rangifer tarandus caribou) of Newfoundland

Lankester¹,

Northcott²

1979

Can. J. Zool.

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Elaphostrongylus cervi Cameron 1931 is identified for the first time in North America from woodland caribou (Rangifer tarandus caribou) in Newfoundland where up to 88% of animals were infected. First-stage nematode larvae identical to those of E. cervi occur in faeces of barren ground caribou (R. t. groenlandicus) of the Kaminuriak herd and of woodland caribou in northern Labrador, Ontario, and Manitoba, suggesting that the parasite is widespread in Rangifer in Canada.In clinically normal caribou, adult E. cervi were found beneath the skin and in fascia of the thoracic musculature. Verminous pneumonia caused by nematode eggs and larvae in the lungs and diffuse lymphocytic leptomeningitis over the brain and spinal cord were consistent aspects of infection. A 10-month-old caribou calf exhibiting neurologic signs had numerous E. cervi among thoracic and cervical muscles but none in the central nervous system. Accumulations of lymphocytes, eosinophils, and histiocytes in the subarachnoid and perineurium of lateral nerves in the posterior region of the spinal cord and destruction of axons in the cauda equina may explain the clinical signs observed.

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Predation risk and habitat selection in the persistence of a remnant caribou population

1988

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A small caribou herd of 24-77 animals resided on Pic Island (1138 ha) in Lake Superior from 1976 to 1984. Most of the caribou populations on the adjacent mainland had gone extinct earlier in this century. We tested three hypotheses for the persistence of this remanant population: (1) there was more forage available on the island than the mainland, (2) the animals on the island were isolated from white-tailed deer and did not develop the meningeal worm infection, and (3) there was less predation by wolves on the island. Forage was more abundant on the mainland than on Pic Island. The eggs of meningeal worms were not found in the feces of deer on the mainland or Pic island. Wolves seldom visited the island and when they did there was escape habitat available for the caribou. We concluded that the herd persisted because of this reduced predation risk and that the animals were prepared to select a reduced variety and phytomass of forage to remain for long periods in the relatively safe island habitat. When the animals did visit the mainland to feed they sclected forbs that provided a large bite size. On the island food supplies were too meager to select plants that gave a large bite size and the caribou spent long intervals feeding. Caribou by using habitats with a large phytomass and selecting for large bite size should minimize their time feeding which would allow them more time to watch for predators.

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A protostrongylid nematode (Strongylida: Protostrongylidae) in woodland caribou (Rangifer tarandus caribou)

Abstract: First-stage protostrongylid larvae found in faeces of woodland caribou (Rangifer tarandus caribou) in northwestern Ontario and Manitoba may be larvae of Elaphostrongylus sp., a well-known agent of neurologic disease in reindeer (Rangifer tarandus tarandus) of Eurasia.

Cited by 11 publications

References 3 publications

Parelaphostrongylus Odocoilei (Nematoda: Protostrongylidae) and a Protostrongylid Nematode in Woodland Caribou (Rangifer Tarandus Caribou) of Alberta, Canada

Parelaphostrongylus Odocoilei (Nematoda: Protostrongylidae) and a Protostrongylid Nematode in Woodland Caribou (Rangifer Tarandus Caribou) of Alberta, Canada

Elaphostrongylus cervi Cameron 1931 (Nematoda: Metastrongyloidea) in caribou (Rangifer tarandus caribou) of Newfoundland

Predation risk and habitat selection in the persistence of a remnant caribou population

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