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Assessing Avian Diets Using Stable Isotopes I: Turnover of 13C in Tissues
Studies of birds that use stable isotopes as dietary tracers require estimates of how quickly stable isotopes in tissues are replaced by isotopes derived from the diet. However, isotopic turnoverExpand
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Assessing Avian Diets Using Stable Isotopes II: Factors Influencing Diet-Tissue Fractionation
Studies using stable-isotope analysis to infer diet require a knowledge of how stable-isotope ratios in consumer tissues are related to dietary values. We determined 61'3C and 6'5N diet-tissueExpand
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Stable-Nitrogen Isotope Enrichment in Avian Tissues Due to Fasting and Nutritional Stress: Implications for Isotopic Analyses of Diet
Studies using measurements of61'5N to delineate diet or trophic level in natural ecosystems are based on the premise that 6'5N values in consumer tissues can be reliably correlated with those in theExpand
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A communal catalogue reveals Earth’s multiscale microbial diversity
Our growing awareness of the microbial world’s importance and diversity contrasts starkly with our limited understanding of its fundamental structure. Despite recent advances in DNA sequencing, aExpand
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AVIAN HABITAT SELECTION: PATTERN FROM PROCESS IN NEST-SITE USE BY DUCKS?
Patterns of habitat use in animals presumably have evolved in response to diverse selective processes, so we first examined whether the theory of natural selection formed the conceptual framework forExpand
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Single-shot readout of an electron spin in silicon
The size of silicon transistors used in microelectronic devices is shrinking to the level at which quantum effects become important. Although this presents a significant challenge for the furtherExpand
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Risk-taking by female ducks: intra- and interspecific tests of nest defense theory
We tested several predictions of nest defense theory by observing variation in flushing distance and probability of nest abandonment within and between six species of waterfowl. In these species,Expand
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Patterns of reproductive effort and success in birds: path analyses of long-term data from European ducks
Summary 1 We tested ecological hypotheses about timing of breeding and reproductive effort in birds, by analysing > 15-year data sets for individually marked females in three species of LatvianExpand
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CAUSES AND CONSEQUENCES OF TREE SWALLOW (TACHYCINETA BICOLOR) DISPERSAL IN SASKATCHEWAN
Abstract Poor breeding success often increases dispersal, but there is conflicting evidence about the putative adaptive benefits of dispersal behavior. Thus, observational and experimental data wereExpand
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