Isotope turnover rate and metabolism of Danio rerio

Over the years stable isotopes have become more popular to trace an organism's diet in the tissue. Carbon and nitrogen isotopic ratios have been shown to be useful elements to show whether the organism's tissue resembles that of their diet. Stable carbon 13C/12C and 15N/14N were used to determine the growth rates and metabolic tissue turnover rates. The average growth rates calculated of the control (TetraminRTM Tropical Flakes), Experimental Diet 1 (Omega One Freeze Dried Blood Worms), and Experimental Diet 2 (Tetra Veggie Algae WafersRTM) for Danio rerio were calculated to be 0.0002 gram/day, -0.0063 gram/day, and 0.0059 gram/day, respectively. The metabolic tissue turnover was found to have a higher role in the turnover rate rather than growth. Lastly, there was no correlation determined between tissue isotope half-lives and metabolic rate due to a lack of consistency in the results.