Download or read book Demography of Vancouver Island Marmots Marmota Vancouverensis in Natural and Clearcut Habitats written by Andrew A. Bryant and published by . This book was released on 19?? with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Marmot Biology written by Kenneth B. Armitage and published by Cambridge University Press. This book was released on 2014-07-24 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Marmot Biology Sociality, Individual Fitness and Population Dynamics"--

Download or read book National Recovery Plan for the Vancouver Island Marmot written by Canadian Wildlife Service. Recovery of Nationally Endangered Wildlife Committee and published by . This book was released on 1994 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Demography Genetics and Population Dynamics of Hoary Marmots Marmota Caligata in the Southest Yukon written by and published by . This book was released on 2004 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: "... We identified the hoary marmot (Marmota caligata) as an "ecological surrogate" for research into the recovery of the Vancouver Island Marmot (VIM) (Marmota vancouverensis) based on the high degree of relatedness and similarities in behaviour and ecology between the two species. Our aim was to understand, in detail, the natural ecological processes that influence population dynamics in a healthy population of social alpine dwelling marmots. ... Our study on hoary marmots demonstrated that their population persistence is determined by climate variability and social behaviour. Reproduction in adult females and survival of pups was closely coupled with annual changes in environmental conditions. Changing snowpack conditions can alter the efficiency at which marmots can hibernate and can also alter their access to food in the spring. Hoary marmot populations are quite robust to extreme variation in climatic conditions but stability is greater in a cyclic climate, which is influenced by the Pacific North American Pattern (PNA). Persistence of hoary marmot population is greatly influenced by their social behaviour. Young marmots delay dispersal beyond their age of reproductive maturity (3 years old), sometimes for several years without reproducing within their birth social group. Retaining subadults (male and female) within a social group has a profound effect on the survival of pups with the odds of survival increasing by a factor of 1.4 for every subadult retained within the social group. VIM populations are also relatively robust to large fluctuations in annual weather conditions. However, based on the demography within clearcuts, populations living in a habitat matrix of clearcuts and alpine have a lowered probability of persistence than if all colonies live only in natural alpine habitat. Furthermore, the Allee effect may be the greatest challenge to the recovery and persistence of VIM. The degree of sociality within VIM are unknown, but we do know that they are highly social, live in family groups and that they socially hibernate, all of which is consistent with our observations in hoary marmots. Therefore, the possibility of an Allee effect for VIM is great and we suggest it is possible that the Allee effect may possibly operate through other mechanisms (i.e. predation). However, this effect may still be detrimental to the recovery and persistence of their populations. The effect of food supplementation on the reproductive fitness of adult female marmots is still inconclusive. The evidence we have so far suggest that the effects of food supplementation may be delayed and positive effects are stronger in more stressful spring conditions. In more stressful years, pups born to supplemented females can be 60% larger than control pups. We have yet to determine if this mass increase provides an advantage to survival during hibernation." -- ASTIS [online] bibliography.

Download or read book Canadian Journal of Zoology written by and published by . This book was released on 2005-04 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Montague Island Marmot written by Ellen Weintraub Lance and published by . This book was released on 2002 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Vancouver Island Marmot written by W. T. Munro and published by Wildlife Branch Ministry of Environment. This book was released on 1985 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this document is to collate information specificto the Vancouver Island marmot and other closely related species, to review the current status of the species, and to formulate aplan for management of the Vancouver Island marmot.

Download or read book The Natural History of Canadian Mammals written by Donna Naughton and published by University of Toronto Press. This book was released on 2012-01-01 with total page 985 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The selection of species to include in this book was based on two principles: 1. Those that in recent times had a viable, naturally occurring wild population in Canada, its continental islands, or in the marine waters of its continental shelf ... [and] 2. Species introduced into Canada by humans"--P. xiv.

Download or read book Contribuciones mastozool gicas en homenaje a Bernardo Villa written by Víctor Sánchez-Cordero and published by UNAM. This book was released on 2005 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book RENEW Report written by and published by . This book was released on 1994 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book National Recovery Plan for the Vancouver Island Marmot Marmota Vancouverensis written by Doug Janz and published by Canadian Wildlife Service. This book was released on 2000 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Animal Behavior Abstracts written by and published by . This book was released on 1996 with total page 1308 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Indicators of Individual and Population Health in the Vancouver Island Marmot Marmota Vancouverensis written by Malcolm Lee McAdie and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Vancouver Island Marmot (Marmota vancouverensis) is an endangered rodent endemic to the mountains of Vancouver Island, British Columbia, Canada. Following population declines in the 1980s and 1990s, an intensive captive breeding and reintroduction program was initiated involving three Canadian zoos and a purpose-built, subalpine facility on Vancouver Island. From 1997 to 2017, 660 marmots were associated with the captive program, including 63 wild-born individuals captured for breeding and 597 marmots born and weaned in captivity. Reintroductions began in 2003 and by 2017 a total of 501 marmots had been released. Although this significantly increased the wild population from its low point in 2003, conservation of the Vancouver Island Marmot (VIM) continues to involve intensive ex situ management, reintroductions, and translocations. Health and disease surveillence is fundamental to the success of conservation programs like the marmot recovery project. This thesis builds upon our understanding of VIM health by describing and evaluating select health parameters, to determine baseline characteristics for VIM under its different treatments (wild, captive and captive-release) and to identify potential risk factors that may influence the health of the marmot's population and its capacity to achieve recovery objectives. The analysis involved data that was collected between 1992 and 2016, and included 1,106 VIM blood profiles, 3,174 physical examinations, 140 post mortem examinations and 533 field mortality records. VIM hematology and serum biochemistry reference ranges were calculated as a baseline metric and were qualitatively comparable to published values for other rodent species. Leukogram and protein values were found to have potential utility as a quantitative measure for comparing VIM management groups. There were significant differences in the clinical and pathological data collected from captive and free-ranging (captive-release and wild) marmots. Captives could be monitored with greater intensity and to an older age, due to increased longevity. A host of clinical and pathological disorders were described in captive marmots, including age-related, management-related, and congenital problems. There was a paucity of health conditions identified in free-ranging VIM and this could be due to a fundamental lack of disease, or limited opportunities to conduct post mortem examinations or evaluate compromised individuals in the field. The analysis did not identify any specific infectious agents that represented a generalized population threat to VIM. Cardiomyopathy and neoplasia, which occurred in older individuals, were the most consequential health complications for captive marmots. Implantation of abdominal radio-transmitters was not found to impact marmot health and was important for identifying mortalities in the field. The first wild hibernation represented a time of significant mortality for VIM released from captivity. However, reintroduced marmots that survived their first year in the wild were comparable to their wild-born counterparts with respect to hibernation success and clinical presentation. Predators continued to represent a major cause of mortality for free-ranging marmots. In the absence of other identified health threats, predation and reduced hibernation success of captive-release marmots appear to be significant factors limiting the health and potential recovery of the in situ population.

Download or read book At Risk written by University College of the Cariboo and published by . This book was released on 2000 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Vancouver Island Marmot Population Dynamics in Early Seral Clearcuts written by Doug Janz and published by . This book was released on 1997 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ecology Abstracts written by and published by . This book was released on 1997 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coverage: 1982- current; updated: monthly. This database covers current ecology research across a wide range of disciplines, reflecting recent advances in light of growing evidence regarding global environmental change and destruction. Major ares of subject coverage include: Algae/lichens, Animals, Annelids, Aquatic ecosystems, Arachnids, Arid zones, Birds, Brackish water, Bryophytes/pteridophytes, Coastal ecosystems, Conifers, Conservation, Control, Crustaceans, Ecosyst em studies, Fungi, Grasses, Grasslands, High altitude environments, Human ecology, Insects, Legumes, Mammals, Management, Microorganisms, Molluscs, Nematodes, Paleo-ecology, Plants, Pollution studies, Reptiles, River basins, Soil, TAiga/tundra, Terrestrial ecosystems, Vertebrates, Wetlands, Woodlands.

Download or read book A Retrospective Analysis of the Vancouver Island Marmot Marmota Vancouverensis Conservation Breeding and Release Program written by Sarah Falconer and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Vancouver Island marmot (Marmota vancouverensis) is an endangered mammal whose population is being recovered with a conservation breeding and release program. This involves management both in and ex situ, so it is vital to understand how the different environments are affecting the populations to maximize program outcomes. The purpose of this thesis was to retrospectively analyze data collected from this program to address questions relevant to population recovery. The first chapter compared the physiology of the managed populations using the neutrophil: lymphocyte ratio and found significant differences in this metric among targeted comparisons. The second chapter assessed factors that may be contributing to hibernation-related mortality of marmots during their first winter post-release. I found a combination of environmental and intrinsic factors influencing this mortality. Overall, this thesis contributes to a growing body of literature surrounding the efficacy of conservation breeding and release programs to recover critically endangered species.