Food quality effects on instar‐specific life histories of a holometabolous insect

Abstract It is a long‐standing challenge to understand how changes in food resources impact consumer life history traits and, in turn, impact how organisms interact with their environment. To characterize food quality effects on life history, most studies follow organisms throughout their life cycle...

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Autores principales:	Leslie A. Holmes, William A. Nelson, Stephen C. Lougheed
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2020
Materias:	cowpea weevil juvenile ontogeny phytophagous consumer stage‐structured population model Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/dd92d71da4674956861914fa67d1e826
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spelling	oai:doaj.org-article:dd92d71da4674956861914fa67d1e8262021-11-04T13:06:09ZFood quality effects on instar‐specific life histories of a holometabolous insect2045-775810.1002/ece3.5790https://doaj.org/article/dd92d71da4674956861914fa67d1e8262020-01-01T00:00:00Zhttps://doi.org/10.1002/ece3.5790https://doaj.org/toc/2045-7758Abstract It is a long‐standing challenge to understand how changes in food resources impact consumer life history traits and, in turn, impact how organisms interact with their environment. To characterize food quality effects on life history, most studies follow organisms throughout their life cycle and quantify major life events, such as age at maturity or fecundity. From these studies, we know that food quality generally impacts body size, juvenile development, and life span. Importantly, throughout juvenile development, many organisms develop through several stages of growth that can have different interactions with their environment. For example, some parasitoids typically attack larger instars, whereas larval insect predators typically attack smaller instars. Interestingly, most studies lump all juvenile stages together, which ignores these ecological changes over juvenile development. We combine a cross‐sectional experimental approach with a stage‐structured population model to estimate instar‐specific vital rates in the bean weevil, Callosobruchus maculatus across a food quality gradient. We characterize food quality effects on the bean weevil's life history traits throughout its juvenile ontogeny to test how food quality impacts instar‐specific vital rates. Vital rates differed across food quality treatments within each instar; however, their effect differed with instar. Weevils consuming low‐quality food spent 38%, 37%, and 18% more time, and were 34%, 53%, and 63% smaller than weevils consuming high‐quality food in the second, third, and fourth instars, respectively. Overall, our results show that consuming poor food quality means slower growth, but that food quality effects on vital rates, growth and development are not equal across instars. Differences in life history traits over juvenile ontogeny in response to food quality may impact how organisms interact with their environment, including how susceptible they are to predation, parasitism, and their competitive ability.Leslie A. HolmesWilliam A. NelsonStephen C. LougheedWileyarticlecowpea weeviljuvenile ontogenyphytophagous consumerstage‐structured population modelEcologyQH540-549.5ENEcology and Evolution, Vol 10, Iss 2, Pp 626-637 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	cowpea weevil juvenile ontogeny phytophagous consumer stage‐structured population model Ecology QH540-549.5
spellingShingle	cowpea weevil juvenile ontogeny phytophagous consumer stage‐structured population model Ecology QH540-549.5 Leslie A. Holmes William A. Nelson Stephen C. Lougheed Food quality effects on instar‐specific life histories of a holometabolous insect
description	Abstract It is a long‐standing challenge to understand how changes in food resources impact consumer life history traits and, in turn, impact how organisms interact with their environment. To characterize food quality effects on life history, most studies follow organisms throughout their life cycle and quantify major life events, such as age at maturity or fecundity. From these studies, we know that food quality generally impacts body size, juvenile development, and life span. Importantly, throughout juvenile development, many organisms develop through several stages of growth that can have different interactions with their environment. For example, some parasitoids typically attack larger instars, whereas larval insect predators typically attack smaller instars. Interestingly, most studies lump all juvenile stages together, which ignores these ecological changes over juvenile development. We combine a cross‐sectional experimental approach with a stage‐structured population model to estimate instar‐specific vital rates in the bean weevil, Callosobruchus maculatus across a food quality gradient. We characterize food quality effects on the bean weevil's life history traits throughout its juvenile ontogeny to test how food quality impacts instar‐specific vital rates. Vital rates differed across food quality treatments within each instar; however, their effect differed with instar. Weevils consuming low‐quality food spent 38%, 37%, and 18% more time, and were 34%, 53%, and 63% smaller than weevils consuming high‐quality food in the second, third, and fourth instars, respectively. Overall, our results show that consuming poor food quality means slower growth, but that food quality effects on vital rates, growth and development are not equal across instars. Differences in life history traits over juvenile ontogeny in response to food quality may impact how organisms interact with their environment, including how susceptible they are to predation, parasitism, and their competitive ability.
format	article
author	Leslie A. Holmes William A. Nelson Stephen C. Lougheed
author_facet	Leslie A. Holmes William A. Nelson Stephen C. Lougheed
author_sort	Leslie A. Holmes
title	Food quality effects on instar‐specific life histories of a holometabolous insect
title_short	Food quality effects on instar‐specific life histories of a holometabolous insect
title_full	Food quality effects on instar‐specific life histories of a holometabolous insect
title_fullStr	Food quality effects on instar‐specific life histories of a holometabolous insect
title_full_unstemmed	Food quality effects on instar‐specific life histories of a holometabolous insect
title_sort	food quality effects on instar‐specific life histories of a holometabolous insect
publisher	Wiley
publishDate	2020
url	https://doaj.org/article/dd92d71da4674956861914fa67d1e826
work_keys_str_mv	AT leslieaholmes foodqualityeffectsoninstarspecificlifehistoriesofaholometabolousinsect AT williamanelson foodqualityeffectsoninstarspecificlifehistoriesofaholometabolousinsect AT stephenclougheed foodqualityeffectsoninstarspecificlifehistoriesofaholometabolousinsect
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Food quality effects on instar‐specific life histories of a holometabolous insect

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