Assessing the relationships between weather, food limitation and breeding ecology in an Arctic top predator
Specialization: Conservation Biology Degree: Master of Science Abstract: A long term project being conducted on a population of Peregrine Falcons (Falco peregrinus) breeding near Rankin Inlet, Nunavut, Canada, has chronicled a steady decline in annual productivity over 30 years. By documenting the d...
Main Author: | |
---|---|
Other Authors: | , , , |
Format: | Thesis |
Language: | English |
Published: |
University of Alberta. Department of Renewable Resources.
2016
|
Subjects: | |
Online Access: | http://hdl.handle.net/10402/era.42694 |
id |
fttriple:oai:gotriple.eu:10402/era.42694 |
---|---|
record_format |
openpolar |
spelling |
fttriple:oai:gotriple.eu:10402/era.42694 2023-05-15T15:15:03+02:00 Assessing the relationships between weather, food limitation and breeding ecology in an Arctic top predator Hedlin, Erik M Franke, Alastair (Renewable Resources Foote, Lee (Renewable Resources) Hamann, Andreas (Renewable Resources) Derocher, Andrew (Biological Sciences) 2016-02-08 http://hdl.handle.net/10402/era.42694 en eng University of Alberta. Department of Renewable Resources. 10402/era.42694 http://hdl.handle.net/10402/era.42694 other ERA : Education and Research Archive envir demo Thesis https://vocabularies.coar-repositories.org/resource_types/c_46ec/ 2016 fttriple 2023-01-22T18:38:48Z Specialization: Conservation Biology Degree: Master of Science Abstract: A long term project being conducted on a population of Peregrine Falcons (Falco peregrinus) breeding near Rankin Inlet, Nunavut, Canada, has chronicled a steady decline in annual productivity over 30 years. By documenting the direct effects of summer rainfall on nestling mortality, a recent study on this population suggested that an increasing frequency of heavy rainfall may partially explain the observed declines. If the lower trophic communities that falcons rely on as prey are also affected by rainfall, reductions in food availability may be further limiting peregrine breeding success. The intent of this project was to determine if the Rankin Inlet population is generally food limited, and to determine if food limitation varied according to yearly precipitation. To answer these questions, I implemented a food supplementation experiment over three breeding seasons (2013 – 2015). After nestlings hatched each year, randomly selected broods periodically received an amount of commercially produced Common Quail (Coturnix coturnix) that correlated to 50% of the brood’s age-specific energetic demand. The first two breeding seasons in which data were collected were uncharacteristically dry with total monthly rainfall amounts well below the 30 year average. The final season of data collection occurred in a summer with total monthly rainfall exceeding the 30 year average, and thus provided us with an opportunity to contrast food limitation across varying environmental conditions. Over 3 years, I food supplemented a total of 93 individuals from 29 broods, and monitored 100 individuals from 32 broods that were not supplemented. Supplementation resulted in higher nestling survival, and more consistent growth between years. Based on these results, I suggest that the Rankin Inlet population is generally food limited during the breeding season. Although I recorded an effect of rainfall on nestling growth, I failed to detect a relationship between ... Thesis Arctic Falco peregrinus Nunavut Rankin Inlet Unknown Arctic Canada Nunavut Rankin Inlet ENVELOPE(-91.983,-91.983,62.734,62.734) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
envir demo |
spellingShingle |
envir demo Hedlin, Erik M Assessing the relationships between weather, food limitation and breeding ecology in an Arctic top predator |
topic_facet |
envir demo |
description |
Specialization: Conservation Biology Degree: Master of Science Abstract: A long term project being conducted on a population of Peregrine Falcons (Falco peregrinus) breeding near Rankin Inlet, Nunavut, Canada, has chronicled a steady decline in annual productivity over 30 years. By documenting the direct effects of summer rainfall on nestling mortality, a recent study on this population suggested that an increasing frequency of heavy rainfall may partially explain the observed declines. If the lower trophic communities that falcons rely on as prey are also affected by rainfall, reductions in food availability may be further limiting peregrine breeding success. The intent of this project was to determine if the Rankin Inlet population is generally food limited, and to determine if food limitation varied according to yearly precipitation. To answer these questions, I implemented a food supplementation experiment over three breeding seasons (2013 – 2015). After nestlings hatched each year, randomly selected broods periodically received an amount of commercially produced Common Quail (Coturnix coturnix) that correlated to 50% of the brood’s age-specific energetic demand. The first two breeding seasons in which data were collected were uncharacteristically dry with total monthly rainfall amounts well below the 30 year average. The final season of data collection occurred in a summer with total monthly rainfall exceeding the 30 year average, and thus provided us with an opportunity to contrast food limitation across varying environmental conditions. Over 3 years, I food supplemented a total of 93 individuals from 29 broods, and monitored 100 individuals from 32 broods that were not supplemented. Supplementation resulted in higher nestling survival, and more consistent growth between years. Based on these results, I suggest that the Rankin Inlet population is generally food limited during the breeding season. Although I recorded an effect of rainfall on nestling growth, I failed to detect a relationship between ... |
author2 |
Franke, Alastair (Renewable Resources Foote, Lee (Renewable Resources) Hamann, Andreas (Renewable Resources) Derocher, Andrew (Biological Sciences) |
format |
Thesis |
author |
Hedlin, Erik M |
author_facet |
Hedlin, Erik M |
author_sort |
Hedlin, Erik M |
title |
Assessing the relationships between weather, food limitation and breeding ecology in an Arctic top predator |
title_short |
Assessing the relationships between weather, food limitation and breeding ecology in an Arctic top predator |
title_full |
Assessing the relationships between weather, food limitation and breeding ecology in an Arctic top predator |
title_fullStr |
Assessing the relationships between weather, food limitation and breeding ecology in an Arctic top predator |
title_full_unstemmed |
Assessing the relationships between weather, food limitation and breeding ecology in an Arctic top predator |
title_sort |
assessing the relationships between weather, food limitation and breeding ecology in an arctic top predator |
publisher |
University of Alberta. Department of Renewable Resources. |
publishDate |
2016 |
url |
http://hdl.handle.net/10402/era.42694 |
long_lat |
ENVELOPE(-91.983,-91.983,62.734,62.734) |
geographic |
Arctic Canada Nunavut Rankin Inlet |
geographic_facet |
Arctic Canada Nunavut Rankin Inlet |
genre |
Arctic Falco peregrinus Nunavut Rankin Inlet |
genre_facet |
Arctic Falco peregrinus Nunavut Rankin Inlet |
op_source |
ERA : Education and Research Archive |
op_relation |
10402/era.42694 http://hdl.handle.net/10402/era.42694 |
op_rights |
other |
_version_ |
1766345434759954432 |