Population Fluctuations in Mink (Mustela Vison) with Comparison to Muskrat (Ondatra Zibethicus) and Ermine (Mustela Erminea) in Southeastern Manitoba and Northwestern Ontario PDF Download
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Author: Richard Ryan Puttenham
Publisher:
ISBN:
Category :
Languages : en
Pages : 1030
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Book Description
Author: Richard Ryan Puttenham
Publisher:
ISBN:
Category :
Languages : en
Pages : 1030
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Manitoba Department of Natural Resources fur harvest records were examined to determine if the provincial populations of mink (Mustela vison), muskrat (Ondatra zibethicus), and ermine (Mustela erminea) exhibit any periodicity. The data were analyzed using an autocorrelation formula. This analysis provided evidence that the provincial mink population exhibits an 8-year cycle. However, the provincial muskrat and ermine populations do not express any discernable trends. The same data were used to determine if there is any association in population cycles among the three fur-bearer species. Correlation coefficients indicated a two year lag in population cycles between mink and muskrat, but none between mink and ermine, and muskrat and ermine. The provincial fur-return data were compared to the price per pelt. The mink population showed a slightly cyclic negative trend in association between the number of animals caught and the price per pelt. The muskrat and ermine populations showed a negative linear trend over eight years. Fur harvest records of eight Manitoba Registered Trapline (RTL) sections plus two Northwestern Ontario RTL regions were examined as above. The two Northwestern Ontario RTL regions were divided into five sections for further comparison. There is evidence of 4-, 8-, 9-, and 10-year population cycles for mink in all but three sections. Muskrat exhibited 4-, 6-, and 9- to 10-year cycles for 7 of 13 sections examined. There was also evidence of population cycles for ermine in 7 of 13 sections. Manitoba sectional fur return data were examined for evidence of association in population cycles among the three species. There is evidence of two and four year lags in population cycles between mink and m skrat for 5 of 8 sections. There was evidence for cycles of association between mink and ermine, and muskrat and ermine in all sections. (Abstract shortened by UMI.).
Author: Richard Ryan Puttenham
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Rune Gerell
Publisher:
ISBN:
Category :
Languages : sv
Pages : 4
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Author: Fumito Koike
Publisher: World Conservation Union
ISBN:
Category : Nature
Languages : en
Pages : 228
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Biological invasion, an issue of growing importance due to the significant increase in international transportation and trade, can disturb the balance of local ecosystems and even destroy them. This collection of papers presented at the International Conference on Assessment and Control of Biological Invasion Risks held in August 2004 at Yokohama National University discusses risk assessment, risk management and eradication. It also includes contributions reporting on the current status of invasion and the properties of alien species in East Asia.
Author: Luigi Boitani
Publisher: Columbia University Press
ISBN: 0231501390
Category : Science
Languages : en
Pages : 668
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The present biodiversity crisis is rife with opportunities to make important conservation decisions; however, the misuse or misapplication of the methods and techniques of animal ecology can have serious consequences for the survival of species. Still, there have been relatively few critical reviews of methodology in the field. This book provides an analysis of some of the most frequently used research techniques in animal ecology, identifying their limitations and misuses, as well as possible solutions to avoid such pitfalls. In the process, contributors to this volume present new perspectives on the collection, analysis, and interpretation of data. Research Techniques in Animal Ecology is an overarching account of central theoretical and methodological controversies in the field, rather than a handbook on the minutiae of techniques. The editors have forged comprehensive presentations of key topics in animal ecology, such as territory and home range estimates, habitation evaluation, population viability analysis, GIS mapping, and measuring the dynamics of societies. Striking a careful balance, each chapter begins by assessing the shortcomings and misapplications of the techniques in question, followed by a thorough review of the current literature, and concluding with possible solutions and suggested guidelines for more robust investigations.
Author: Douglas H. Johnson
Publisher:
ISBN:
Category : Foxes
Languages : en
Pages : 68
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Author: Edward William Nelson
Publisher: DigiCat
ISBN:
Category : Fiction
Languages : en
Pages : 319
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DigiCat Publishing presents to you this special edition of "Wild Animals of North America" (Intimate Studies of Big and Little Creatures of the Mammal Kingdom) by Edward William Nelson. DigiCat Publishing considers every written word to be a legacy of humankind. Every DigiCat book has been carefully reproduced for republishing in a new modern format. The books are available in print, as well as ebooks. DigiCat hopes you will treat this work with the acknowledgment and passion it deserves as a classic of world literature.
Author: Bernd H. Kuennecke
Publisher: Bloomsbury Publishing USA
ISBN: 0313087911
Category : Science
Languages : en
Pages : 216
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This volume in the Greenwood Guides to Biomes of the World series covers the vast forest that cover much of North America and similar regions. The volume covers the three major types of temperate forest biomes: boreal forests (e.g. the evergreen forests of the Pacific Northwest), Temperate Broadleaf Deciduous Forest, and Mediterranean Woodland and Scrub, examining all aspects that define these biomes: • Vegetation • Geographical Distribution • Soil • Challenges posed by the environment • Adaptation of the plants and animals to the environment • Conservation efforts, maps, photos, diagrams, drawings, and tables accompany the text, as do sidebars that highlight habitats, species, and ecological relationships The volume includes a bibliography of accessible resources for further research.
Author: Charles J. Krebs
Publisher: Oxford University Press on Demand
ISBN: 9780195133936
Category : Science
Languages : en
Pages : 511
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The boreal forest is one of the world's great ecosystems, stretching across North America and Eurasia in an unbroken band and containing about 25% of the world's closed canopy forests. The Kluane Boreal Forest Ecosystem Project was a 10-year study by nine of Canada's leading ecologists to unravel the impact of the snowshoe hare cycle on the plants and the other vertebrate species in the boreal forest. In much of the boreal forest, the snowshoe hare acts as a keystone herbivore, fluctuating in 9-10 year cycles, and dragging along secondary cycles in predators such as lynx and great-horned owls. By manipulating the ecosystem on a large scale from the bottom via fertilizer additions and from the top by predator exclosures, they have traced the plant-herbivore relationships and the predator-prey relationships in this ecosystem to try to answer the question of what drives small mammal population cycles. This study is unique in being large scale and experimental on a relatively simple ecosystem, with the overall goal of defining what determines community structure in the boreal forest. Ecosystem Dynamics of the Boreal Forest: The Kluane Project summarizes these findings, weaving new discoveries of the role of herbivores-turned-predators, compensatory plant growth, and predators-eating-predators with an ecological story rich in details and clear in its findings of a community where predation plays a key role in determining the fate of individuals and populations. The study of the Kluane boreal forest raises key questions about the scale of conservation required for boreal forest communities and the many mammals and birds that live there.
