Marine-based Subsistence Trends and the Stable Isotope Analysis of Dog Bones from Namu, British Columbia

1999 ◽  
Vol 26 (4) ◽  
pp. 399-407 ◽  
Author(s):  
Aubrey Cannon ◽  
Henry P. Schwarcz ◽  
Martin Knyf
Keyword(s):  
British Columbia ◽  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Isotope Analysis

scholarly journals Variation in Hydrogen Stable-Isotope Ratios Between Adult and Nestling Cooper's Hawks

The Condor ◽  
2003 ◽  
Vol 105 (3) ◽  
pp. 567-572 ◽  
Author(s):  
Timothy D. Meehan ◽  
Robert N. Rosenfield ◽  
Viorel N. Atudorei ◽  
John Bielefeldt ◽  
Laura J. Rosenfield ◽  
...  
Keyword(s):  
British Columbia ◽  
Stable Isotope ◽  
North Dakota ◽  
Stable Isotope Analysis ◽  
Isotope Analysis ◽  
Stable Isotope Ratios ◽  
Accipiter Cooperii ◽  
Breeding Grounds ◽  
Para Determinar ◽  
Cooper's Hawks

AbstractHydrogen stable-isotope analysis of feathers is an increasingly popular method for estimating the origins of migrating and wintering birds. Use of this method requires that investigators know which feathers are grown on breeding grounds and how the hydrogen stable-isotope ratios of feathers (δDf) relate to those of local precipitation (δDp). In this study, we measured δDf of adult (primaries 1, 3, and 10) and nestling Cooper's Hawks (Accipiter cooperii) in Wisconsin, North Dakota, and British Columbia, Canada. As previously shown, δDf of nestling feathers were related to δDp. In contrast, the δDf of adult feathers grown on the breeding grounds were substantially greater than those of their nestlings, and varied significantly across primary feathers and study areas. Our findings suggest that it is not possible to use hydrogen stable-isotope analysis of feathers to learn the origins of migrating adult Cooper's Hawks (or possibly adults of other large-bodied species with extended molting periods) until more is learned about the physiological or ecological mechanisms underlying these isotopic discrepancies.Variación en las Proporciones de Isótopos Estables de Hidrógeno entre Adultos y Polluelos de Accipiter cooperiiResumen. El análisis de isótopos estables de hidrógeno en las plumas es un método cada vez más popular para determinar el origen de aves migratorias e invernantes. El uso de esta técnica requiere que el investigador conozca qué plumas crecen en los lugares de nidificación y cómo las proporciones de isótopos estables de hidrógeno de las plumas (δDf) se relacionan con aquellas de la precipitación local (δDp). En este estudio, medimos las δDf en adultos (primarias 1, 3 y 10) y en polluelos de Accipiter cooperii en Wisconsin, North Dakota y British Columbia, Canadá. Como se ha mostrado previamente, las δDf de plumas de polluelos se encontraban relacionadas con las δDp. Por el contrario, las δDf de plumas de adultos que crecieron en los lugares de nidificación fueron substancialmente mayores que aquellas de sus polluelos, y variaron significativamente entre plumas primarias y áreas de estudio. Nuestros resultados sugieren que no es posible utilizar el análisis de isótopos estables de hidrógeno de plumas para determinar el origen de adultos migratorios de A. cooperii (o de adultos de otras especies de aves con tamaños corporales grandes y con períodos de muda extendidos) hasta que los mecanismos ecológicos y fisiológicos que subyacen a estas discrepancias isotópicas sean mejor entendidos.

Using stable carbon (δ13C) and nitrogen (δ15N) isotopes to infer trophic relationships among black and grizzly bears in the upper Columbia River basin, British Columbia

2000 ◽  
Vol 78 (8) ◽  
pp. 1332-1339 ◽  
Author(s):  
Keith A Hobson ◽  
Bruce N McLellan ◽  
John G Woods
Keyword(s):  
British Columbia ◽  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Isotope Analysis ◽  
Columbia River ◽  
Black Bears ◽  
Columbia River Basin ◽  
Grizzly Bears ◽  
Stable Carbon ◽  
Convenient Means

Ecological segregation of species is difficult to determine using conventional dietary analysis techniques. However, stable-isotope analysis may provide a convenient means of establishing trophic segregation of species and of groups of animals within a species in the same area. We measured stable carbon (δ13C) and nitrogen (δ15N) isotope values in hair of black bears (Ursus americanus) and grizzly bears (Ursus arctos) inhabiting the upper Columbia River basin in southeastern British Columbia, together with samples of potential foods ranging from plant material through invertebrates and ungulate meat. We found extensive overlap in both δ15N and δ13C values of hair from male grizzly bears and black bears of both sexes. Female grizzly bears, however, had lower δ15N values in their hair than the other groups of bears, indicating either less animal protein in their diet or a reliance on foods more depleted in 15N, possibly related to altitude. Our isotopic model generally confirmed a herbivorous diet for both bear species (a mean estimated plant contribution of 91%). Bears showing the highest δ15N values were those captured because they posed a management problem. We suggest that the slope of the relationship between tissue δ15N and δ13C values might provide a convenient means of evaluating the occurrence of consumption of animal protein in populations, regardless of local isotopic end-points for dietary samples. We examined three black bear cubs from dens and found them to be about a trophic level higher than adult females, reflecting their dependence on mother's milk, a result generally confirmed by an analysis of eight mother-cub pairs from Minnesota. Our study demonstrates how stable-isotope analysis of bear tissue can be used to monitor the feeding habits of populations, as well as provide dietary histories that may reveal dietary specializations among individuals.

Development of an In-Situ Mass Spectrometer for Stable Isotope Analysis

2003 ◽  
Author(s):  
R. T. Short ◽  
Gottfried P. Kibelka ◽  
Robert H. Byrne ◽  
David Hollander
Keyword(s):  
Stable Isotope ◽  
Mass Spectrometer ◽  
Stable Isotope Analysis ◽  
Isotope Analysis

LATE HOLOCENE HYDROCLIMATE RECONSTRUCTION FROM LAKE CHICHOJ, GUATEMALA USING STABLE ISOTOPE ANALYSIS OF SEDIMENTS

2017 ◽  
Author(s):  
Peter Mortensen ◽  
◽  
Nathan D. Stansell ◽  
Byron A. Steinman ◽  
Gilles Y. Brocard ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Late Holocene ◽  
Isotope Analysis

Exploring the Potential of Electrospray-Orbitrap for Stable Isotope Analysis Using Nitrate as a Model

2021 ◽  
Author(s):  
Andreas Hilkert ◽  
John K. Böhlke ◽  
Stanley J. Mroczkowski ◽  
Kyle L. Fort ◽  
Konstantin Aizikov ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Isotope Analysis

Exploring Diversity in Neolithic Agropastoral Management in Mainland Greece Using Stable Isotope Analysis

2021 ◽  
pp. 1-24
Author(s):  
Petra Vaiglova ◽  
John Coleman ◽  
Charlotte Diffey ◽  
Vasiliki Tzevelekidi ◽  
Melanie Fillios ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Isotope Analysis
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