Seasonal differences in habitat selection by muskrats (Ondatra zibethicus) in a high subarctic environment: Mackenzie Delta, Northwest Territories, Canada
Bibliography: p. 140-158. Differences in summer and winter habitat selection by muskrats (Ondatra zibethicus spatulata) in the Mackenzie Delta, a heterogeneous high subarctic-low arctic environment, were studied. Quantitative data consisting of 11 biotic and abiotic habitat variables were obtained f...
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Online Access: | http://hdl.handle.net/1880/23042 https://doi.org/10.11575/PRISM/21051 |
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ftunivcalgary:oai:prism.ucalgary.ca:1880/23042 2023-08-27T04:08:15+02:00 Seasonal differences in habitat selection by muskrats (Ondatra zibethicus) in a high subarctic environment: Mackenzie Delta, Northwest Territories, Canada Jelinski, Dennis E. (Dennis Edward), 1956- Hamill, Louis 2000001969 1984 xvi, 158 leaves : ill. 30 cm. application/pdf http://hdl.handle.net/1880/23042 https://doi.org/10.11575/PRISM/21051 eng eng University of Calgary Calgary Jelinski, D. E. (1984). Seasonal differences in habitat selection by muskrats (Ondatra zibethicus) in a high subarctic environment: Mackenzie Delta, Northwest Territories, Canada (Unpublished master's thesis). University of Calgary, Calgary, AB. doi:10.11575/PRISM/21051 http://dx.doi.org/10.11575/PRISM/21051 031522360X QL 737 R6 J44 1986 http://hdl.handle.net/1880/23042 University of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission. QL 737 R6 J44 1986 Muskrats - Northwest Territories - Ecology Muskrats - Habitat Habitat (Ecology) master thesis 1984 ftunivcalgary https://doi.org/10.11575/PRISM/21051 2023-08-06T06:27:43Z Bibliography: p. 140-158. Differences in summer and winter habitat selection by muskrats (Ondatra zibethicus spatulata) in the Mackenzie Delta, a heterogeneous high subarctic-low arctic environment, were studied. Quantitative data consisting of 11 biotic and abiotic habitat variables were obtained from 72 winter burrow sites and 119 summer burrow sites. On the basis of burrow site locations, multivariate analysis of variance revealed that habitats used by muskrats in the two seasons differed significantly. The single discriminant function generated by a discriminant function analysis was strongly correlated with variables describing food, cover, and overwinter survival of muskrats. Muskrats in summer preferred to burrow in closer proximity to shallow water, on gentler slopes, with cover and nearer to Equisetum fluviatile than muskrats in winter. I suggest that the alteration of habitat selection behavior in relation to changes in the seasonal quality of the habitat is a condition whereby habitat breadth narrows in winter. The discriminant function correctly classified 70% of the samples. Food habits corresponded closely with intense utilization of Equisetum fluviatile and Carex aqua tilus in summer and roots of submerged aquatic macrophytes in winter. Lake ice severely limited foraging space and in some instances probably resulted in high mortality. The energy demands of reproduction, maintenance, and climatic stress were believed to be responsible for body fat reserves being very low in summer, with substantial storage taking place in winter. Lake habitats were divided into two groups on the basis of their hydrological regimes: (1) stable water level lakes (unconnected lakes); and (2) flowing water lake types (lakes connected to distributary channels). Population densities differed seasonally in these two lake types. Discriminant analysis revealed significant differences in the physical morphometry of the two lake types resulting in structurally different muskrat habitat. Submerged aquatic plant production ... Master Thesis Arctic Mackenzie Delta Northwest Territories Subarctic PRISM - University of Calgary Digital Repository Arctic Northwest Territories Canada Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) Winter Lake ENVELOPE(-112.918,-112.918,64.484,64.484) |
institution |
Open Polar |
collection |
PRISM - University of Calgary Digital Repository |
op_collection_id |
ftunivcalgary |
language |
English |
topic |
QL 737 R6 J44 1986 Muskrats - Northwest Territories - Ecology Muskrats - Habitat Habitat (Ecology) |
spellingShingle |
QL 737 R6 J44 1986 Muskrats - Northwest Territories - Ecology Muskrats - Habitat Habitat (Ecology) Jelinski, Dennis E. (Dennis Edward), 1956- Seasonal differences in habitat selection by muskrats (Ondatra zibethicus) in a high subarctic environment: Mackenzie Delta, Northwest Territories, Canada |
topic_facet |
QL 737 R6 J44 1986 Muskrats - Northwest Territories - Ecology Muskrats - Habitat Habitat (Ecology) |
description |
Bibliography: p. 140-158. Differences in summer and winter habitat selection by muskrats (Ondatra zibethicus spatulata) in the Mackenzie Delta, a heterogeneous high subarctic-low arctic environment, were studied. Quantitative data consisting of 11 biotic and abiotic habitat variables were obtained from 72 winter burrow sites and 119 summer burrow sites. On the basis of burrow site locations, multivariate analysis of variance revealed that habitats used by muskrats in the two seasons differed significantly. The single discriminant function generated by a discriminant function analysis was strongly correlated with variables describing food, cover, and overwinter survival of muskrats. Muskrats in summer preferred to burrow in closer proximity to shallow water, on gentler slopes, with cover and nearer to Equisetum fluviatile than muskrats in winter. I suggest that the alteration of habitat selection behavior in relation to changes in the seasonal quality of the habitat is a condition whereby habitat breadth narrows in winter. The discriminant function correctly classified 70% of the samples. Food habits corresponded closely with intense utilization of Equisetum fluviatile and Carex aqua tilus in summer and roots of submerged aquatic macrophytes in winter. Lake ice severely limited foraging space and in some instances probably resulted in high mortality. The energy demands of reproduction, maintenance, and climatic stress were believed to be responsible for body fat reserves being very low in summer, with substantial storage taking place in winter. Lake habitats were divided into two groups on the basis of their hydrological regimes: (1) stable water level lakes (unconnected lakes); and (2) flowing water lake types (lakes connected to distributary channels). Population densities differed seasonally in these two lake types. Discriminant analysis revealed significant differences in the physical morphometry of the two lake types resulting in structurally different muskrat habitat. Submerged aquatic plant production ... |
author2 |
Hamill, Louis |
format |
Master Thesis |
author |
Jelinski, Dennis E. (Dennis Edward), 1956- |
author_facet |
Jelinski, Dennis E. (Dennis Edward), 1956- |
author_sort |
Jelinski, Dennis E. (Dennis Edward), 1956- |
title |
Seasonal differences in habitat selection by muskrats (Ondatra zibethicus) in a high subarctic environment: Mackenzie Delta, Northwest Territories, Canada |
title_short |
Seasonal differences in habitat selection by muskrats (Ondatra zibethicus) in a high subarctic environment: Mackenzie Delta, Northwest Territories, Canada |
title_full |
Seasonal differences in habitat selection by muskrats (Ondatra zibethicus) in a high subarctic environment: Mackenzie Delta, Northwest Territories, Canada |
title_fullStr |
Seasonal differences in habitat selection by muskrats (Ondatra zibethicus) in a high subarctic environment: Mackenzie Delta, Northwest Territories, Canada |
title_full_unstemmed |
Seasonal differences in habitat selection by muskrats (Ondatra zibethicus) in a high subarctic environment: Mackenzie Delta, Northwest Territories, Canada |
title_sort |
seasonal differences in habitat selection by muskrats (ondatra zibethicus) in a high subarctic environment: mackenzie delta, northwest territories, canada |
publisher |
University of Calgary |
publishDate |
1984 |
url |
http://hdl.handle.net/1880/23042 https://doi.org/10.11575/PRISM/21051 |
op_coverage |
2000001969 |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) ENVELOPE(-112.918,-112.918,64.484,64.484) |
geographic |
Arctic Northwest Territories Canada Mackenzie Delta Winter Lake |
geographic_facet |
Arctic Northwest Territories Canada Mackenzie Delta Winter Lake |
genre |
Arctic Mackenzie Delta Northwest Territories Subarctic |
genre_facet |
Arctic Mackenzie Delta Northwest Territories Subarctic |
op_relation |
Jelinski, D. E. (1984). Seasonal differences in habitat selection by muskrats (Ondatra zibethicus) in a high subarctic environment: Mackenzie Delta, Northwest Territories, Canada (Unpublished master's thesis). University of Calgary, Calgary, AB. doi:10.11575/PRISM/21051 http://dx.doi.org/10.11575/PRISM/21051 031522360X QL 737 R6 J44 1986 http://hdl.handle.net/1880/23042 |
op_rights |
University of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission. |
op_doi |
https://doi.org/10.11575/PRISM/21051 |
_version_ |
1775348944416538624 |