The Implications Of Agriculture In Interior Alaska For Population Dynamics Of Canada Geese
Dissertation (Ph.D.) University of Alaska Fairbanks, 2001 Understanding how environmental change affects demography is essential for understanding and managing populations. An anthropogenic change in the environment that has affected wildlife populations is widespread agricultural development. Agric...
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ftunivalaska:oai:scholarworks.alaska.edu:11122/8609 2023-05-15T15:46:22+02:00 The Implications Of Agriculture In Interior Alaska For Population Dynamics Of Canada Geese Eichholz, Michael William Sedinger, James S. 2001 http://hdl.handle.net/11122/8609 unknown http://hdl.handle.net/11122/8609 Ecology Forestry Environmental science Dissertation phd 2001 ftunivalaska 2023-02-23T21:37:05Z Dissertation (Ph.D.) University of Alaska Fairbanks, 2001 Understanding how environmental change affects demography is essential for understanding and managing populations. An anthropogenic change in the environment that has affected wildlife populations is widespread agricultural development. Agriculture has both negatively and positively impacted abundance of species by affecting a variety of vital rates that influence population abundance. In this study, I describe the migration ecology of Canada geese (Branta canadensis) that nest and stage in Interior Alaska. I also describe how the introduction of agriculture has potentially positively impacted population dynamics of Canada geese by increasing nutrient acquisition, thereby improving their fecundity and survival. Two subspecies of Canada geese used Interior Alaska for staging and at least partially segregated themselves during spring and fall staging. I documented a difference in survival between two age classes of Canada geese, primarily lesser Canada geese ( B. c. parvipes), and attributed it to the higher susceptibility to harvest of hatch-year (HY) geese. Estimates of annual survival of Canada geese in this study are among the lowest, and estimates of recovery rates are among the highest, for a migratory population of geese, likely due to behavioral traits and habitat selection that make lesser Canada geese more susceptibility to harvest. Survival of after-hatch-year (AHY) female Canada geese was positively associated with the amount of endogenous nutrient reserves females had at the time of banding in fall. An experimental manipulation of nutrient reserves, however, suggested that the association between nutrient reserves and survival results from variation in individual quality (not measured), not a direct relationship between nutrient reserves and survival. Female geese in our study gained fat and minerals, but not protein, during spring staging. Fall staging geese had fat levels greater than or equal to spring staging geese, suggesting fat ... Doctoral or Postdoctoral Thesis Branta canadensis Alaska University of Alaska: ScholarWorks@UA Canada Fairbanks |
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University of Alaska: ScholarWorks@UA |
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unknown |
topic |
Ecology Forestry Environmental science |
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Ecology Forestry Environmental science Eichholz, Michael William The Implications Of Agriculture In Interior Alaska For Population Dynamics Of Canada Geese |
topic_facet |
Ecology Forestry Environmental science |
description |
Dissertation (Ph.D.) University of Alaska Fairbanks, 2001 Understanding how environmental change affects demography is essential for understanding and managing populations. An anthropogenic change in the environment that has affected wildlife populations is widespread agricultural development. Agriculture has both negatively and positively impacted abundance of species by affecting a variety of vital rates that influence population abundance. In this study, I describe the migration ecology of Canada geese (Branta canadensis) that nest and stage in Interior Alaska. I also describe how the introduction of agriculture has potentially positively impacted population dynamics of Canada geese by increasing nutrient acquisition, thereby improving their fecundity and survival. Two subspecies of Canada geese used Interior Alaska for staging and at least partially segregated themselves during spring and fall staging. I documented a difference in survival between two age classes of Canada geese, primarily lesser Canada geese ( B. c. parvipes), and attributed it to the higher susceptibility to harvest of hatch-year (HY) geese. Estimates of annual survival of Canada geese in this study are among the lowest, and estimates of recovery rates are among the highest, for a migratory population of geese, likely due to behavioral traits and habitat selection that make lesser Canada geese more susceptibility to harvest. Survival of after-hatch-year (AHY) female Canada geese was positively associated with the amount of endogenous nutrient reserves females had at the time of banding in fall. An experimental manipulation of nutrient reserves, however, suggested that the association between nutrient reserves and survival results from variation in individual quality (not measured), not a direct relationship between nutrient reserves and survival. Female geese in our study gained fat and minerals, but not protein, during spring staging. Fall staging geese had fat levels greater than or equal to spring staging geese, suggesting fat ... |
author2 |
Sedinger, James S. |
format |
Doctoral or Postdoctoral Thesis |
author |
Eichholz, Michael William |
author_facet |
Eichholz, Michael William |
author_sort |
Eichholz, Michael William |
title |
The Implications Of Agriculture In Interior Alaska For Population Dynamics Of Canada Geese |
title_short |
The Implications Of Agriculture In Interior Alaska For Population Dynamics Of Canada Geese |
title_full |
The Implications Of Agriculture In Interior Alaska For Population Dynamics Of Canada Geese |
title_fullStr |
The Implications Of Agriculture In Interior Alaska For Population Dynamics Of Canada Geese |
title_full_unstemmed |
The Implications Of Agriculture In Interior Alaska For Population Dynamics Of Canada Geese |
title_sort |
implications of agriculture in interior alaska for population dynamics of canada geese |
publishDate |
2001 |
url |
http://hdl.handle.net/11122/8609 |
geographic |
Canada Fairbanks |
geographic_facet |
Canada Fairbanks |
genre |
Branta canadensis Alaska |
genre_facet |
Branta canadensis Alaska |
op_relation |
http://hdl.handle.net/11122/8609 |
_version_ |
1766381065369288704 |