Ghrelin and food acquisition in wild and cultured Japanese eel (Anguilla japonica)

Takashi Yada; Michihisa Abe; Kenzo Kaifu; Kazuki Yokouchi; Nobuto Fukuda; Sakie Kodama; Hiroshi Hakoyama; Maho Ogoshi; Hiroyuki Kaiya; Tatsuya Sakamoto; Shunsuke Moriyama; Katsumi Tsukamoto

doi:10.1016/j.cbpa.2020.110700

Ghrelin and food acquisition in wild and cultured Japanese eel (Anguilla japonica)

Takashi Yada, Michihisa Abe, Kenzo Kaifu, Kazuki Yokouchi, Nobuto Fukuda, Sakie Kodama, Hiroshi Hakoyama, Maho Ogoshi, Hiroyuki Kaiya, Tatsuya Sakamoto, Shunsuke Moriyama, Katsumi Tsukamoto

Research output: Contribution to journal › Article › peer-review

Abstract

To clarify the relationships between growth, endocrine status and habitat characteristics in Japanese eel (Anguilla japonica), plasma and stomach mRNA levels of ghrelin were examined in wild eels captured in the river and the bay, and in cultured eels during and after experimental fasting. Wild juvenile eels captured in freshwater habitats within the river showed significantly higher plasma and stomach mRNA levels of ghrelin than did fish obtained from brackish-water habitats within the bay. In cultured eels experimentally fasted for 4 weeks, plasma and stomach mRNA levels of ghrelin increased. After refeeding, the both parameters returned to the levels observed in continuously feeding control fish. In pigmented elvers, 2 months of feed restriction resulted in a significant increase in whole-body ghrelin mRNA. It is suggested that interaction between ghrelin and feeding is related to their habitats through differential food acquisition in fresh and brackish water environments.

Original language	English
Article number	110700
Journal	Comparative Biochemistry and Physiology -Part A : Molecular and Integrative Physiology
Volume	245
DOIs	https://doi.org/10.1016/j.cbpa.2020.110700
Publication status	Published - Jul 2020

Keywords

Cortisol
Food acquisition
Ghrelin
Growth hormone
Insulin-like growth factor
Japanese eel

ASJC Scopus subject areas

Biochemistry
Physiology
Molecular Biology

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Yada, T., Abe, M., Kaifu, K., Yokouchi, K., Fukuda, N., Kodama, S., Hakoyama, H., Ogoshi, M., Kaiya, H., Sakamoto, T., Moriyama, S., & Tsukamoto, K. (2020). Ghrelin and food acquisition in wild and cultured Japanese eel (Anguilla japonica). Comparative Biochemistry and Physiology -Part A : Molecular and Integrative Physiology, 245, [110700]. https://doi.org/10.1016/j.cbpa.2020.110700

Ghrelin and food acquisition in wild and cultured Japanese eel (Anguilla japonica). / Yada, Takashi; Abe, Michihisa; Kaifu, Kenzo; Yokouchi, Kazuki; Fukuda, Nobuto; Kodama, Sakie; Hakoyama, Hiroshi; Ogoshi, Maho; Kaiya, Hiroyuki; Sakamoto, Tatsuya; Moriyama, Shunsuke; Tsukamoto, Katsumi.

In: Comparative Biochemistry and Physiology -Part A : Molecular and Integrative Physiology, Vol. 245, 110700, 07.2020.

Research output: Contribution to journal › Article › peer-review

Yada, T, Abe, M, Kaifu, K, Yokouchi, K, Fukuda, N, Kodama, S, Hakoyama, H, Ogoshi, M, Kaiya, H, Sakamoto, T, Moriyama, S & Tsukamoto, K 2020, 'Ghrelin and food acquisition in wild and cultured Japanese eel (Anguilla japonica)', Comparative Biochemistry and Physiology -Part A : Molecular and Integrative Physiology, vol. 245, 110700. https://doi.org/10.1016/j.cbpa.2020.110700

Yada, Takashi ; Abe, Michihisa ; Kaifu, Kenzo ; Yokouchi, Kazuki ; Fukuda, Nobuto ; Kodama, Sakie ; Hakoyama, Hiroshi ; Ogoshi, Maho ; Kaiya, Hiroyuki ; Sakamoto, Tatsuya ; Moriyama, Shunsuke ; Tsukamoto, Katsumi. / Ghrelin and food acquisition in wild and cultured Japanese eel (Anguilla japonica). In: Comparative Biochemistry and Physiology -Part A : Molecular and Integrative Physiology. 2020 ; Vol. 245.

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abstract = "To clarify the relationships between growth, endocrine status and habitat characteristics in Japanese eel (Anguilla japonica), plasma and stomach mRNA levels of ghrelin were examined in wild eels captured in the river and the bay, and in cultured eels during and after experimental fasting. Wild juvenile eels captured in freshwater habitats within the river showed significantly higher plasma and stomach mRNA levels of ghrelin than did fish obtained from brackish-water habitats within the bay. In cultured eels experimentally fasted for 4 weeks, plasma and stomach mRNA levels of ghrelin increased. After refeeding, the both parameters returned to the levels observed in continuously feeding control fish. In pigmented elvers, 2 months of feed restriction resulted in a significant increase in whole-body ghrelin mRNA. It is suggested that interaction between ghrelin and feeding is related to their habitats through differential food acquisition in fresh and brackish water environments.",

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author = "Takashi Yada and Michihisa Abe and Kenzo Kaifu and Kazuki Yokouchi and Nobuto Fukuda and Sakie Kodama and Hiroshi Hakoyama and Maho Ogoshi and Hiroyuki Kaiya and Tatsuya Sakamoto and Shunsuke Moriyama and Katsumi Tsukamoto",

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AU - Kodama, Sakie

AU - Hakoyama, Hiroshi

AU - Ogoshi, Maho

AU - Kaiya, Hiroyuki

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AU - Moriyama, Shunsuke

AU - Tsukamoto, Katsumi

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AB - To clarify the relationships between growth, endocrine status and habitat characteristics in Japanese eel (Anguilla japonica), plasma and stomach mRNA levels of ghrelin were examined in wild eels captured in the river and the bay, and in cultured eels during and after experimental fasting. Wild juvenile eels captured in freshwater habitats within the river showed significantly higher plasma and stomach mRNA levels of ghrelin than did fish obtained from brackish-water habitats within the bay. In cultured eels experimentally fasted for 4 weeks, plasma and stomach mRNA levels of ghrelin increased. After refeeding, the both parameters returned to the levels observed in continuously feeding control fish. In pigmented elvers, 2 months of feed restriction resulted in a significant increase in whole-body ghrelin mRNA. It is suggested that interaction between ghrelin and feeding is related to their habitats through differential food acquisition in fresh and brackish water environments.

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