Administration of tetrodotoxin protects artificially raised juvenile tiger puffer Takifugu rubripes from predators |
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| Authors: | Yoshitaka Sakakura Tomohiro Takatani Junichi Nakayasu Hideki Yamazaki Kazutaka Sakiyama |
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| Affiliation: | 1.Graduate School of Fisheries and Environmental Sciences,Nagasaki University,Nagasaki,Japan;2.Research Center for Marine Invertebrates, National Research Institute of Fisheries and Environment of Inland Sea,Japan Fisheries Research and Education Agency,Onomichi,Japan;3.Japan Sea National Research Institute of Fisheries,Japan Fisheries Research and Education Agency,Miyazu,Japan |
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| Abstract: | We examined the effects of tetrodotoxin (TTX) administration on artificially raised tiger puffer Takifugu rubripes juvenile survival after release into a mesocosm with predators to clarify the ecological significance of TTX. Pellets containing three different concentrations of TTX [0 as the control, 7 and 14 mouse units (MU)/g diet] were fed to non-toxic artificially raised T. rubripes juveniles for 10 days. TTX accumulation in the various tissues of fish was detected except for in the control diet group. TTX administration did not affect survival or growth of the fish. One hundred fish from each diet group were released together after TTX administration into a salt pond mesocosm (2650 m2) with predators (Lateolabrax sp.) for 5 days. Survival after release was significantly higher in both the fish fed with the 7 MU TTX/g diet (62%) and the 14 MU TTX/g diet (74%) than in the control fish (32%). |
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