| causes of death in captive vancouver island marmots (marmota vancouverensis) including presumptive pulmonary mycoplasmosis. | | 2001 | 11360865 |
| nasal osteosarcoma and interstitial cell tumor in a vancouver island marmot (marmota vancouverensis). | a 6-yr-old male vancouver island marmot (marmota vancouverensis) presented for poor hibernation, weight loss, and symmetric trunk alopecia. an abdominal interstitial cell tumor was identified and surgically removed. serum levels of estrogen were markedly elevated before surgery and decreased after tumor removal, indicating that the tumor had been functionally secretory. nine months later, the marmot presented with respiratory stridor. a large boney nasal mass was identified radiographically and ... | 2011 | 22946416 |
| the reproductive endocrinology and behavior of vancouver island marmot (marmota vancouverensis). | the vancouver island marmot (marmota vancouverensis; vim) is one of north america's most endangered species with fewer than 150 individuals remaining in the wild. a captive breeding program was established across four facilities in canada as an insurance population and source of animals for reintroduction to the wild. the purpose of this study was to gather information about the basic reproductive biology and behavior of this species, which is essential to improve captive breeding programs. regu ... | 2013 | 21404327 |
| social 'meltdown' in the demise of an island endemic: allee effects and the vancouver island marmot. | 1. more than 75 years have passed since w.c. allee proposed that breakdowns in sociality may shift animal populations to inverse density dependence at small sizes and thereby hasten spirals to extinction. despite decades of attention, empirical evidence of this 'allee effect' in wild populations remains scarce. 2. here, we report on findings from a multi-year study of the population ecology and behaviour of the critically endangered vancouver island marmot (marmota vancouverensis) and present qu ... | 2010 | 20546064 |
| endangered vancouver island marmots (marmota vancouverensis): sentinels of atmospherically delivered contaminants to british columbia, canada. | we characterized legacy and new contaminants in the highly endangered vancouver island (british columbia, canada) marmot and found generally low blood and fat concentrations of a complex mixture of pesticides, polychlorinated biphenyls (pcbs), -dibenzo-p-dioxins (pcdds), -dibenzofurans (pcdfs), polybrominated biphenyls (pbbs), polybrominated diphenyl ethers (pbdes), and polychlorinated naphthalenes (pcns) in their tissues. the dominance of the more volatile alpha-hexachlorocyclohexane (hch) and ... | 2004 | 14982388 |
| the effects of body region, season and external arsenic application on hair cortisol concentration. | hair cortisol analysis has been used to quantify hormone levels in circulation in several mammal species. hair remains stable for decades or centuries, allowing researchers to use archived hair samples to investigate hormone levels that span long time periods. however, several studies have found that intra-individual variability, driven by the body region from which a sample is derived, confounds measurements of systemic glucocorticoid hormone concentrations. in addition, the external applicatio ... | 2018 | 30018762 |
| systemic encephalitozoonosis due to encephalitozoon cuniculi strain iv in a vancouver island marmot ( marmota vancouverensis). | a 2-mo-old vancouver island marmot ( marmota vancouverensis), housed at a quarantined breeding facility, presented for acute obtundation and vestibular ataxia. physical examination revealed poor growth compared with littermates, poor nutritional condition, and mild dehydration. the animal's condition deteriorated over 24 hr, and it was euthanized following the development of generalized seizures. no gross abnormalities were observed upon postmortem evaluation. histologic evaluation revealed seve ... | 2018 | 29900789 |