2020 年 68 巻 2 号 p. 159-162
To evaluate the effects of four Umami substances (inosine-monophosphate: IMP, monosodium glutamate: MSG, guanosine monophosphate: GMP, succinic acid: SA) on feed intake and neuropeptide Y (NPY) expression in yellowtail. IMP and GMP increased both feed intake and npy expression, while MSG did not increase feed intake or npy expression. SA did not increase feed intake, but significantly increased npy expression. npy expression levels reflected feed intake, except for the SA treatment, suggesting that some Umami substances might increase feed intake by increasing hypothalamus npy expression.