TY - JOUR
T1 - Ghrelin and food acquisition in wild and cultured Japanese eel (Anguilla japonica)
AU - Yada, Takashi
AU - Abe, Michihisa
AU - Kaifu, Kenzo
AU - Yokouchi, Kazuki
AU - Fukuda, Nobuto
AU - Kodama, Sakie
AU - Hakoyama, Hiroshi
AU - Ogoshi, Maho
AU - Kaiya, Hiroyuki
AU - Sakamoto, Tatsuya
AU - Moriyama, Shunsuke
AU - Tsukamoto, Katsumi
N1 - Funding Information:
This study was supported in part by a grant-in-aid from the Ministry of Agriculture , Forestry and Fisheries , Japan; JSPS KAKENHI, Japan, Grant Number JP20570065 to Hiroyuki Kaiya, JP24360201 , JP26450296 , and JP17K07950 to Takashi Yada.
Publisher Copyright:
© 2020
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/7
Y1 - 2020/7
N2 - 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.
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.
KW - Cortisol
KW - Food acquisition
KW - Ghrelin
KW - Growth hormone
KW - Insulin-like growth factor
KW - Japanese eel
UR - http://www.scopus.com/inward/record.url?scp=85083357820&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85083357820&partnerID=8YFLogxK
U2 - 10.1016/j.cbpa.2020.110700
DO - 10.1016/j.cbpa.2020.110700
M3 - Article
C2 - 32294535
AN - SCOPUS:85083357820
VL - 245
JO - Comparative Biochemistry and Physiology - A Molecular and Integrative Physiology
JF - Comparative Biochemistry and Physiology - A Molecular and Integrative Physiology
SN - 1095-6433
M1 - 110700
ER -