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  • High fidelity: isotopic relationship between stream invertebrates and their gut contents

    Author(s)
    Jardine, TD
    Curry, RA
    Heard, KS
    Cunjak, RA
    Griffith University Author(s)
    Jardine, Timothy
    Year published
    2005
    Metadata
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    Abstract
    Benthic macroinvertebrate families were sampled along 3 rivers in New Brunswick, Canada. Stable isotopes of C and N were compared between body tissue and gut contents of individuals. d13C and d15N of body tissue and gut contents were strongly correlated (r 5 0.94 and 0.93, respectively) over a wide range of d values. In nonpredators, only minor fractionation of d13C and d15N was observed. In predators, diet-tissue fractionation of 13C was minor, but 15N fractionation that may have been related to diet quality (N content) was observed. The influence of diet quality on N-isotope fractionation was inconsistent in direction and ...
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    Benthic macroinvertebrate families were sampled along 3 rivers in New Brunswick, Canada. Stable isotopes of C and N were compared between body tissue and gut contents of individuals. d13C and d15N of body tissue and gut contents were strongly correlated (r 5 0.94 and 0.93, respectively) over a wide range of d values. In nonpredators, only minor fractionation of d13C and d15N was observed. In predators, diet-tissue fractionation of 13C was minor, but 15N fractionation that may have been related to diet quality (N content) was observed. The influence of diet quality on N-isotope fractionation was inconsistent in direction and strength among families. Our results suggest that subjecting primary consumers to gut clearance prior to processing for stable-isotope analysis is unnecessary, but the guts of predators should be removed before processing.
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    Journal Title
    The North American Benthological Society
    Volume
    24
    Issue
    2
    DOI
    https://doi.org/10.1899/04-092.1
    Subject
    Ecology
    Ecology not elsewhere classified
    Fisheries sciences
    Fisheries sciences not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/29203
    Collection
    • Journal articles

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