Life-history consequences of chronic nutritional stress in an outbreaking insect defoliator.

Food shortage is a common situation in nature but little is known about the strategies animals use to overcome it. This lack of knowledge is especially true for outbreaking insects, which commonly experience nutritional stress for several successive generations when they reach high population densit...

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Autores principales:	Enric Frago, Eric Bauce
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/cbd694b6f1c746f6bd696c54ae83236c
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spelling	oai:doaj.org-article:cbd694b6f1c746f6bd696c54ae83236c2021-11-18T08:33:40ZLife-history consequences of chronic nutritional stress in an outbreaking insect defoliator.1932-620310.1371/journal.pone.0088039https://doaj.org/article/cbd694b6f1c746f6bd696c54ae83236c2014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24505368/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Food shortage is a common situation in nature but little is known about the strategies animals use to overcome it. This lack of knowledge is especially true for outbreaking insects, which commonly experience nutritional stress for several successive generations when they reach high population densities. The aim of this study is to evaluate the life history consequences of chronic nutritional stress in the outbreaking moth Choristoneura fumiferana. Larvae were reared on two different artificial diets that emulate nutritional conditions larvae face during their natural population density cycle (low and medium quality artificial diets). After four generations, a subset of larvae was fed on the same diet as their parents, and another on the opposite diet. We explored larval life-history strategies to cope with nutritional stress, its associated costs and the influence of nutritional conditions experienced in the parental generation. We found no evidence of nutritional stress in the parental generation increasing offspring ability to feed on low quality diet, but the contrary: compared to offspring from parents that were fed a medium quality diet, larvae from parents fed a low quality diet had increased mortality, reduced growth rate and reduced female reproductive output. Our results support a simple stress hypothesis because the negative effects of malnutrition accumulated over successive generations. Density-dependent deterioration in plant quality is thought to be an important factor governing the population dynamics of outbreaking insects and we hypothesize that chronic nutritional stress can be a driver of outbreak declines of C. fumiferana, and of forest insects in general.Enric FragoEric BaucePublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 2, p e88039 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Enric Frago Eric Bauce Life-history consequences of chronic nutritional stress in an outbreaking insect defoliator.
description	Food shortage is a common situation in nature but little is known about the strategies animals use to overcome it. This lack of knowledge is especially true for outbreaking insects, which commonly experience nutritional stress for several successive generations when they reach high population densities. The aim of this study is to evaluate the life history consequences of chronic nutritional stress in the outbreaking moth Choristoneura fumiferana. Larvae were reared on two different artificial diets that emulate nutritional conditions larvae face during their natural population density cycle (low and medium quality artificial diets). After four generations, a subset of larvae was fed on the same diet as their parents, and another on the opposite diet. We explored larval life-history strategies to cope with nutritional stress, its associated costs and the influence of nutritional conditions experienced in the parental generation. We found no evidence of nutritional stress in the parental generation increasing offspring ability to feed on low quality diet, but the contrary: compared to offspring from parents that were fed a medium quality diet, larvae from parents fed a low quality diet had increased mortality, reduced growth rate and reduced female reproductive output. Our results support a simple stress hypothesis because the negative effects of malnutrition accumulated over successive generations. Density-dependent deterioration in plant quality is thought to be an important factor governing the population dynamics of outbreaking insects and we hypothesize that chronic nutritional stress can be a driver of outbreak declines of C. fumiferana, and of forest insects in general.
format	article
author	Enric Frago Eric Bauce
author_facet	Enric Frago Eric Bauce
author_sort	Enric Frago
title	Life-history consequences of chronic nutritional stress in an outbreaking insect defoliator.
title_short	Life-history consequences of chronic nutritional stress in an outbreaking insect defoliator.
title_full	Life-history consequences of chronic nutritional stress in an outbreaking insect defoliator.
title_fullStr	Life-history consequences of chronic nutritional stress in an outbreaking insect defoliator.
title_full_unstemmed	Life-history consequences of chronic nutritional stress in an outbreaking insect defoliator.
title_sort	life-history consequences of chronic nutritional stress in an outbreaking insect defoliator.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/cbd694b6f1c746f6bd696c54ae83236c
work_keys_str_mv	AT enricfrago lifehistoryconsequencesofchronicnutritionalstressinanoutbreakinginsectdefoliator AT ericbauce lifehistoryconsequencesofchronicnutritionalstressinanoutbreakinginsectdefoliator
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Life-history consequences of chronic nutritional stress in an outbreaking insect defoliator.

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