Experimentally derived incorporation rates and diet-to-tissue discrimination values for carbon and nitrogen stable isotopes in gray wolves (Canis lupus) fed a marine diet
| Autor: | Ashley E. Stanek, Shannon Jensen, Nathan Wolf, Jeffrey M. Welker |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
biology ved/biology Stable isotope ratio 010401 analytical chemistry ved/biology.organism_classification_rank.species chemistry.chemical_element Gray wolf biology.organism_classification 010603 evolutionary biology 01 natural sciences Differential effects Nitrogen 0104 chemical sciences Canis chemistry Environmental chemistry Animal Science and Zoology Ecology Evolution Behavior and Systematics |
| Zdroj: | Canadian Journal of Zoology. 97:1225-1230 |
| ISSN: | 1480-3283 0008-4301 |
| DOI: | 10.1139/cjz-2019-0049 |
| Popis: | Recent studies have noted the differential effects of marine versus terrestrial diets on the carbon and nitrogen stable isotope (13C and 15N, respectively) diet-to-tissue discrimination values and incorporation rates for omnivorous and carnivorous mammals. Inaccurate estimates of these parameters may result in misrepresentation of diet composition or in the timing of diet shifts. Here, we present the results of a diet-switch experiment designed to estimate diet-to-tissue discrimination values and incorporation rates for tissues of gray wolves (Canis lupus Linnaeus, 1758) fed a diet of Pacific salmon (genus Oncorhynchus Suckley, 1861). Our results demonstrate substantial differences in both parameters between wolves maintained on a marine (salmon) diet and wolves maintained on terrestrially sourced prey (beef, Bos taurus Linnaeus, 1758). Increased awareness of the significance of marine resources to omnivorous and carnivorous consumers, like wolves, highlights the importance of phenomenological and mechanistic understandings of the effects of fish and other marine prey on dietary investigations based on stable isotopes. |
| Databáze: | OpenAIRE |
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