Abstract
To investigate the effect of oxidative stress on the survival of two Brachionus species of rotifer, we examined the effective dose of juglone, which generates reactive oxygen species, and compared survival times between the two species. First, we observed that juglone affected survival in the rotifers in a dose-dependent manner between 0.02 to 20 μM, and that treatment at above 2 μM showed acute toxicity causing the animals to die within a few hours. Next, we found the difference in survival time between the two species exposed to 20 μM juglone: B. rotundiformis was significantly more tolerant against the substance than the allied species B. plicatilis. The findings suggest that exploring the basis of species-specific abilities to persist under oxidative stress will be of great interest to uncover the underlying mechanisms governing the stress resistance of the rotifer, as well as contributing to their stable mass production for aquaculture.
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Acknowledgements
The authors wish to thank two anonymous reviewers for their critical reading of our manuscript, and Drs. Atsushi Hagiwara and Koushiro Suga of Nagasaki University for providing the rotifer JS strain. This study was partly supported by a Grant-in-Aid for Young Scientist (A) no. 18688010 from the Ministry of Education, Culture, Sports, and Science and Technology of Japan, and a Research Grant for Young Researchers from the Kitasato University to T.Y.
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Tanaka, C., Hashimoto, Y., Nakao, S. et al. Effect of juglone on the survival time of two Brachionus species (Rotifera): species-specific tolerance against oxidative stress. Fish Sci 75, 191–194 (2009). https://doi.org/10.1007/s12562-008-0009-5
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DOI: https://doi.org/10.1007/s12562-008-0009-5