Understanding how birds rebuild fat stores during migration: insights from an experimental study

Abstract Mechanisms underlying fat accumulation for long-distance migration are not fully understood. This is especially relevant in the context of global change, as many migrants are dealing with changes in natural habitats and associated food sources and energy stores. The continental Black-tailed...

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Autores principales:	Pedro M. Araújo, Ivan Viegas, Afonso D. Rocha, Auxiliadora Villegas, John G. Jones, Liliana Mendonça, Jaime A. Ramos, José A. Masero, José A. Alves
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9201803b0afb4eadbf848fbdf416e06c
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spelling	oai:doaj.org-article:9201803b0afb4eadbf848fbdf416e06c2021-12-02T15:08:46ZUnderstanding how birds rebuild fat stores during migration: insights from an experimental study10.1038/s41598-019-46487-z2045-2322https://doaj.org/article/9201803b0afb4eadbf848fbdf416e06c2019-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-46487-zhttps://doaj.org/toc/2045-2322Abstract Mechanisms underlying fat accumulation for long-distance migration are not fully understood. This is especially relevant in the context of global change, as many migrants are dealing with changes in natural habitats and associated food sources and energy stores. The continental Black-tailed godwit Limosa limosa limosa is a long-distance migratory bird that has undergone a considerable dietary shift over the past few decades. Historically, godwits fed on an animal-based diet, but currently, during the non-breeding period godwits feed almost exclusively on rice seeds. The latter diet may allow building up of their fuel stores for migration by significantly increasing de novo lipogenesis (DNL) activity. Here, we performed an experiment to investigate lipid flux and the abundance of key enzymes involved in DNL in godwits, during fasting and refueling periods at the staging site, while feeding on rice seeds or fly larvae. Despite no significant differences found in enzymatic abundance (FASN, ME1, ACC and LPL) in stored fat, experimental godwits feeding on rice seeds presented high rates of DNL when compared to fly-larvae fed birds (~35 times more) and fasted godwits (no DNL activity). The increase of fractional DNL in godwits feeding on a carbohydrate-rich diet can potentially be enhanced by the fasting period that stimulates lipogenesis. Although requiring further testing, these recent findings provide new insights into the mechanisms of avian fat accumulation during a fasting and refueling cycle and associated responses to habitat and dietary changes in a migratory species.Pedro M. AraújoIvan ViegasAfonso D. RochaAuxiliadora VillegasJohn G. JonesLiliana MendonçaJaime A. RamosJosé A. MaseroJosé A. AlvesNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-11 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Pedro M. Araújo Ivan Viegas Afonso D. Rocha Auxiliadora Villegas John G. Jones Liliana Mendonça Jaime A. Ramos José A. Masero José A. Alves Understanding how birds rebuild fat stores during migration: insights from an experimental study
description	Abstract Mechanisms underlying fat accumulation for long-distance migration are not fully understood. This is especially relevant in the context of global change, as many migrants are dealing with changes in natural habitats and associated food sources and energy stores. The continental Black-tailed godwit Limosa limosa limosa is a long-distance migratory bird that has undergone a considerable dietary shift over the past few decades. Historically, godwits fed on an animal-based diet, but currently, during the non-breeding period godwits feed almost exclusively on rice seeds. The latter diet may allow building up of their fuel stores for migration by significantly increasing de novo lipogenesis (DNL) activity. Here, we performed an experiment to investigate lipid flux and the abundance of key enzymes involved in DNL in godwits, during fasting and refueling periods at the staging site, while feeding on rice seeds or fly larvae. Despite no significant differences found in enzymatic abundance (FASN, ME1, ACC and LPL) in stored fat, experimental godwits feeding on rice seeds presented high rates of DNL when compared to fly-larvae fed birds (~35 times more) and fasted godwits (no DNL activity). The increase of fractional DNL in godwits feeding on a carbohydrate-rich diet can potentially be enhanced by the fasting period that stimulates lipogenesis. Although requiring further testing, these recent findings provide new insights into the mechanisms of avian fat accumulation during a fasting and refueling cycle and associated responses to habitat and dietary changes in a migratory species.
format	article
author	Pedro M. Araújo Ivan Viegas Afonso D. Rocha Auxiliadora Villegas John G. Jones Liliana Mendonça Jaime A. Ramos José A. Masero José A. Alves
author_facet	Pedro M. Araújo Ivan Viegas Afonso D. Rocha Auxiliadora Villegas John G. Jones Liliana Mendonça Jaime A. Ramos José A. Masero José A. Alves
author_sort	Pedro M. Araújo
title	Understanding how birds rebuild fat stores during migration: insights from an experimental study
title_short	Understanding how birds rebuild fat stores during migration: insights from an experimental study
title_full	Understanding how birds rebuild fat stores during migration: insights from an experimental study
title_fullStr	Understanding how birds rebuild fat stores during migration: insights from an experimental study
title_full_unstemmed	Understanding how birds rebuild fat stores during migration: insights from an experimental study
title_sort	understanding how birds rebuild fat stores during migration: insights from an experimental study
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/9201803b0afb4eadbf848fbdf416e06c
work_keys_str_mv	AT pedromaraujo understandinghowbirdsrebuildfatstoresduringmigrationinsightsfromanexperimentalstudy AT ivanviegas understandinghowbirdsrebuildfatstoresduringmigrationinsightsfromanexperimentalstudy AT afonsodrocha understandinghowbirdsrebuildfatstoresduringmigrationinsightsfromanexperimentalstudy AT auxiliadoravillegas understandinghowbirdsrebuildfatstoresduringmigrationinsightsfromanexperimentalstudy AT johngjones understandinghowbirdsrebuildfatstoresduringmigrationinsightsfromanexperimentalstudy AT lilianamendonca understandinghowbirdsrebuildfatstoresduringmigrationinsightsfromanexperimentalstudy AT jaimearamos understandinghowbirdsrebuildfatstoresduringmigrationinsightsfromanexperimentalstudy AT joseamasero understandinghowbirdsrebuildfatstoresduringmigrationinsightsfromanexperimentalstudy AT joseaalves understandinghowbirdsrebuildfatstoresduringmigrationinsightsfromanexperimentalstudy
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Understanding how birds rebuild fat stores during migration: insights from an experimental study

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