Cichlasoma dimerus responds to refeeding with a partial compensatory growth associated with an increment of the feed conversion efficiency and a rapid recovery of GH/IGFs axis

Many fish species display compensatory growth (CG), a phenomenon by which fasted fish grow faster during refeeding. However, most studies use a group-housed fish approach that could be problematic in social fish when interaction between individuals is not considered or eliminated. Additionally, the...

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Detalles Bibliográficos
Publicado: 2018
Materias:
fish
GHRs
growth
growth hormone
IGFs
refeeding
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13535773_v24_n4_p1234_Delgadin
http://hdl.handle.net/20.500.12110/paper_13535773_v24_n4_p1234_Delgadin
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_13535773_v24_n4_p1234_Delgadin
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spelling paper:paper_13535773_v24_n4_p1234_Delgadin2023-06-08T16:11:03Z Cichlasoma dimerus responds to refeeding with a partial compensatory growth associated with an increment of the feed conversion efficiency and a rapid recovery of GH/IGFs axis fish GHRs growth growth hormone IGFs refeeding Many fish species display compensatory growth (CG), a phenomenon by which fasted fish grow faster during refeeding. However, most studies use a group-housed fish approach that could be problematic in social fish when interaction between individuals is not considered or eliminated. Additionally, the growth hormone (GH)/insulin-like growth factors’ (IGF-1 and IGF-2) axis is implicated in postnatal growth in vertebrates, but its relevance in CG is not fully understood. Thus, the aim of this work was to determine whether CG occurs in a social fish, Cichlasoma dimerus, using an individually held fish approach and secondly, to evaluate the GH/IGFs expression profile during refeeding by 3 days and 3 weeks. C. dimerus showed partial CG. The feed conversion efficiency (FCE) was higher in three-day-refed fish, which presented higher GH plasma and mRNA levels than controls but shown no differences in liver and muscle GH receptors (GHR1 and GHR2) and IGFs mRNA levels. Surprisingly, three-week-refed fish exhibited GHR1 and IGF-2 increments, but a reduction in GHR2 expression in muscle. These results show a strong association between GH levels, growth rate and FCE during refeeding, and a long-lasting effect of refeeding on muscular expression of GHRs and IGF-2. © 2018 John Wiley & Sons Ltd 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13535773_v24_n4_p1234_Delgadin http://hdl.handle.net/20.500.12110/paper_13535773_v24_n4_p1234_Delgadin
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic fish
GHRs
growth
growth hormone
IGFs
refeeding
spellingShingle fish
GHRs
growth
growth hormone
IGFs
refeeding
Cichlasoma dimerus responds to refeeding with a partial compensatory growth associated with an increment of the feed conversion efficiency and a rapid recovery of GH/IGFs axis
topic_facet fish
GHRs
growth
growth hormone
IGFs
refeeding
description Many fish species display compensatory growth (CG), a phenomenon by which fasted fish grow faster during refeeding. However, most studies use a group-housed fish approach that could be problematic in social fish when interaction between individuals is not considered or eliminated. Additionally, the growth hormone (GH)/insulin-like growth factors’ (IGF-1 and IGF-2) axis is implicated in postnatal growth in vertebrates, but its relevance in CG is not fully understood. Thus, the aim of this work was to determine whether CG occurs in a social fish, Cichlasoma dimerus, using an individually held fish approach and secondly, to evaluate the GH/IGFs expression profile during refeeding by 3 days and 3 weeks. C. dimerus showed partial CG. The feed conversion efficiency (FCE) was higher in three-day-refed fish, which presented higher GH plasma and mRNA levels than controls but shown no differences in liver and muscle GH receptors (GHR1 and GHR2) and IGFs mRNA levels. Surprisingly, three-week-refed fish exhibited GHR1 and IGF-2 increments, but a reduction in GHR2 expression in muscle. These results show a strong association between GH levels, growth rate and FCE during refeeding, and a long-lasting effect of refeeding on muscular expression of GHRs and IGF-2. © 2018 John Wiley & Sons Ltd
title Cichlasoma dimerus responds to refeeding with a partial compensatory growth associated with an increment of the feed conversion efficiency and a rapid recovery of GH/IGFs axis
title_short Cichlasoma dimerus responds to refeeding with a partial compensatory growth associated with an increment of the feed conversion efficiency and a rapid recovery of GH/IGFs axis
title_full Cichlasoma dimerus responds to refeeding with a partial compensatory growth associated with an increment of the feed conversion efficiency and a rapid recovery of GH/IGFs axis
title_fullStr Cichlasoma dimerus responds to refeeding with a partial compensatory growth associated with an increment of the feed conversion efficiency and a rapid recovery of GH/IGFs axis
title_full_unstemmed Cichlasoma dimerus responds to refeeding with a partial compensatory growth associated with an increment of the feed conversion efficiency and a rapid recovery of GH/IGFs axis
title_sort cichlasoma dimerus responds to refeeding with a partial compensatory growth associated with an increment of the feed conversion efficiency and a rapid recovery of gh/igfs axis
publishDate 2018
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13535773_v24_n4_p1234_Delgadin
http://hdl.handle.net/20.500.12110/paper_13535773_v24_n4_p1234_Delgadin
_version_ 1768546551402070016

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