Nutrient Allocation Strategies to Eggs by Lesser Snow Geese (Chen caerulescens) at a Sub-Arctic Colony
This is one of the last articles co-written by Dr. R.L. Jefferies before his death in 2009. It was published after his passing - in January 2011. The relative allocation of endogenous- and exogenous-derived nutrients to reproductive investment in Arctic-nesting geese is affected by body size, migrati...
Main Authors: | , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
University of California Press
|
Subjects: | |
Online Access: | http://hdl.handle.net/10315/10046 |
id |
ftyorkuniv:oai:yorkspace.library.yorku.ca:10315/10046 |
---|---|
record_format |
openpolar |
spelling |
ftyorkuniv:oai:yorkspace.library.yorku.ca:10315/10046 2023-10-01T03:53:39+02:00 Nutrient Allocation Strategies to Eggs by Lesser Snow Geese (Chen caerulescens) at a Sub-Arctic Colony Hobson, Keith A. Sharp, Christopher M. Jefferies, Robert L. Rockwell, Robert F. Abraham, Kenneth F. Jan-11 application/pdf http://hdl.handle.net/10315/10046 en eng University of California Press Auk (2011) 128(1): 156-265 http://hdl.handle.net/10315/10046 http://www.ucpress.edu/ http://www.jstor.org/pss/10.1525/auk.2010.10086 C13 Cape Churchill Eggs endogenous-derived nutrients exogenous-derived nutrients Hudson Bay Lowlands migration N15 Article ftyorkuniv 2023-09-02T23:02:36Z This is one of the last articles co-written by Dr. R.L. Jefferies before his death in 2009. It was published after his passing - in January 2011. The relative allocation of endogenous- and exogenous-derived nutrients to reproductive investment in Arctic-nesting geese is affected by body size, migration distance, and proximate conditions on the wintering, staging, and breeding grounds prior to clutch initiation. We used C13 and N15 measurements of muscle tissue and egg lipid-free yolk and albumen and C13 analysis of abdominal fat and egg yolk lipids, together with isotopic analyses of foraging plants, to quantify the relative use of endogenous and exogenous reserves in egg production in a breeding population of sub-Arctic Lesser Snow Geese (Chen caerulescens caerulescens) on the Cape Churchill Peninsula, Manitoba, from 2005 to 2008. We used a concentration-dependent, two-isotope, three-source Bayesian (SIAR) mixing model to derive estimates of endogenous reserves to egg macronutrients and a single-isotope (C13), two-source (exogenous vs. endogenous) Bayesian model to estimate the source of lipids to eggs. Endogenous protein contributions to eggs were similar to those found using identical Bayesian analytical methods for the larger-bodied Greater Snow Goose (Chen caerulescens atlantica) breeding in the Canadian High Arctic and were on the order of 30%. However, endogenous lipid contributions were considerably greater for the population of Lesser Snow Geese (mean annual contribution of 55.5% vs. 22.3%). This suggests that advantages of larger body size for transport of body lipid reserves for long distances may be countered by the need to use lipids to fuel migration over greater distances. In addition, feeding opportunities of Greater Snow Geese upon arrival at their more distant breeding sites were likely adequate to offset a shorter breeding season and longer development times for offspring than at lower-latitude sites. Article in Journal/Newspaper Arctic Cape Churchill Churchill Hudson Bay York University, Toronto: YorkSpace Arctic Cape Churchill ENVELOPE(-93.218,-93.218,58.763,58.763) Churchill Peninsula ENVELOPE(-62.781,-62.781,-66.440,-66.440) Hudson Hudson Bay |
institution |
Open Polar |
collection |
York University, Toronto: YorkSpace |
op_collection_id |
ftyorkuniv |
language |
English |
topic |
C13 Cape Churchill Eggs endogenous-derived nutrients exogenous-derived nutrients Hudson Bay Lowlands migration N15 |
spellingShingle |
C13 Cape Churchill Eggs endogenous-derived nutrients exogenous-derived nutrients Hudson Bay Lowlands migration N15 Hobson, Keith A. Sharp, Christopher M. Jefferies, Robert L. Rockwell, Robert F. Abraham, Kenneth F. Nutrient Allocation Strategies to Eggs by Lesser Snow Geese (Chen caerulescens) at a Sub-Arctic Colony |
topic_facet |
C13 Cape Churchill Eggs endogenous-derived nutrients exogenous-derived nutrients Hudson Bay Lowlands migration N15 |
description |
This is one of the last articles co-written by Dr. R.L. Jefferies before his death in 2009. It was published after his passing - in January 2011. The relative allocation of endogenous- and exogenous-derived nutrients to reproductive investment in Arctic-nesting geese is affected by body size, migration distance, and proximate conditions on the wintering, staging, and breeding grounds prior to clutch initiation. We used C13 and N15 measurements of muscle tissue and egg lipid-free yolk and albumen and C13 analysis of abdominal fat and egg yolk lipids, together with isotopic analyses of foraging plants, to quantify the relative use of endogenous and exogenous reserves in egg production in a breeding population of sub-Arctic Lesser Snow Geese (Chen caerulescens caerulescens) on the Cape Churchill Peninsula, Manitoba, from 2005 to 2008. We used a concentration-dependent, two-isotope, three-source Bayesian (SIAR) mixing model to derive estimates of endogenous reserves to egg macronutrients and a single-isotope (C13), two-source (exogenous vs. endogenous) Bayesian model to estimate the source of lipids to eggs. Endogenous protein contributions to eggs were similar to those found using identical Bayesian analytical methods for the larger-bodied Greater Snow Goose (Chen caerulescens atlantica) breeding in the Canadian High Arctic and were on the order of 30%. However, endogenous lipid contributions were considerably greater for the population of Lesser Snow Geese (mean annual contribution of 55.5% vs. 22.3%). This suggests that advantages of larger body size for transport of body lipid reserves for long distances may be countered by the need to use lipids to fuel migration over greater distances. In addition, feeding opportunities of Greater Snow Geese upon arrival at their more distant breeding sites were likely adequate to offset a shorter breeding season and longer development times for offspring than at lower-latitude sites. |
format |
Article in Journal/Newspaper |
author |
Hobson, Keith A. Sharp, Christopher M. Jefferies, Robert L. Rockwell, Robert F. Abraham, Kenneth F. |
author_facet |
Hobson, Keith A. Sharp, Christopher M. Jefferies, Robert L. Rockwell, Robert F. Abraham, Kenneth F. |
author_sort |
Hobson, Keith A. |
title |
Nutrient Allocation Strategies to Eggs by Lesser Snow Geese (Chen caerulescens) at a Sub-Arctic Colony |
title_short |
Nutrient Allocation Strategies to Eggs by Lesser Snow Geese (Chen caerulescens) at a Sub-Arctic Colony |
title_full |
Nutrient Allocation Strategies to Eggs by Lesser Snow Geese (Chen caerulescens) at a Sub-Arctic Colony |
title_fullStr |
Nutrient Allocation Strategies to Eggs by Lesser Snow Geese (Chen caerulescens) at a Sub-Arctic Colony |
title_full_unstemmed |
Nutrient Allocation Strategies to Eggs by Lesser Snow Geese (Chen caerulescens) at a Sub-Arctic Colony |
title_sort |
nutrient allocation strategies to eggs by lesser snow geese (chen caerulescens) at a sub-arctic colony |
publisher |
University of California Press |
publishDate |
|
url |
http://hdl.handle.net/10315/10046 |
long_lat |
ENVELOPE(-93.218,-93.218,58.763,58.763) ENVELOPE(-62.781,-62.781,-66.440,-66.440) |
geographic |
Arctic Cape Churchill Churchill Peninsula Hudson Hudson Bay |
geographic_facet |
Arctic Cape Churchill Churchill Peninsula Hudson Hudson Bay |
genre |
Arctic Cape Churchill Churchill Hudson Bay |
genre_facet |
Arctic Cape Churchill Churchill Hudson Bay |
op_relation |
Auk (2011) 128(1): 156-265 http://hdl.handle.net/10315/10046 |
op_rights |
http://www.ucpress.edu/ http://www.jstor.org/pss/10.1525/auk.2010.10086 |
_version_ |
1778520395060609024 |