Stable isotope turnover and half-life in animal tissues: a literature synthesis.

Adding ‘isotope’ (δ 13 C, δ 15 N, δ 34 S) as a categorical variable to the above model revealed marginal significance (p = 0.06), and no significant body mass-isotope interaction (p = 0.29).

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This finding corresponds with numerous other studies reporting that fish internal organs and blood plasma turn over rapidly compared to fish blood or muscle tissue [ 28 , 30 , 31 ].The remaining ectothermic groups (with the exception of vertebrate ectotherm whole body) had statistically indistinguishable intercepts, thereby indicating a common allometric relationship. Vertebrate ectotherm whole body had a marginally significant higher intercept than the other groups ( Table 3 ).

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