The effect of temperature on host patch exploitation by an egg parasitoid.

The effect of temperature during host patch exploitation by parasitoids remains poorly understood, despite its importance on female reproductive success. Under laboratory conditions, we explored the behaviour of Anaphes listronoti, an egg parasitoid of the carrot weevil, Listronotus oregonensis, whe...

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Autores principales:	Julie Augustin, Guy Boivin, Gaétan Bourgeois, Jacques Brodeur
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b7859c7bdb1343ba8af93058884b3973
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spelling	oai:doaj.org-article:b7859c7bdb1343ba8af93058884b39732021-12-02T20:06:42ZThe effect of temperature on host patch exploitation by an egg parasitoid.1932-620310.1371/journal.pone.0254750https://doaj.org/article/b7859c7bdb1343ba8af93058884b39732021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0254750https://doaj.org/toc/1932-6203The effect of temperature during host patch exploitation by parasitoids remains poorly understood, despite its importance on female reproductive success. Under laboratory conditions, we explored the behaviour of Anaphes listronoti, an egg parasitoid of the carrot weevil, Listronotus oregonensis, when foraging on a host patch at five temperatures. Temperature had a strong effect on the female tendency to exploit the patch: A. listronoti females parasitized more eggs at intermediate temperature (20 to 30°C) compared to those foraging at the extreme of the range (15.9°C and 32.8°C). However, there was no difference in offspring sex-ratio and clutch size between temperature treatments. Mechanisms of host acceptance within a patch differed between temperatures, especially at 32.8°C where females used ovipositor insertion rather than antennal contact to assess whether a host was already parasitized or not, suggesting that host handling and chemical cues detection were probably constrained at high temperature. Females spent less time on the host patch with increasing temperatures, but temperature had no effect on patch-leaving rules. Our results show that foraging A. listronoti females behave better than expected at sub-optimal temperatures, but worse than expected at supra-optimal temperatures. This could impair parasitoid performance under ongoing climate change.Julie AugustinGuy BoivinGaétan BourgeoisJacques BrodeurPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 7, p e0254750 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Julie Augustin Guy Boivin Gaétan Bourgeois Jacques Brodeur The effect of temperature on host patch exploitation by an egg parasitoid.
description	The effect of temperature during host patch exploitation by parasitoids remains poorly understood, despite its importance on female reproductive success. Under laboratory conditions, we explored the behaviour of Anaphes listronoti, an egg parasitoid of the carrot weevil, Listronotus oregonensis, when foraging on a host patch at five temperatures. Temperature had a strong effect on the female tendency to exploit the patch: A. listronoti females parasitized more eggs at intermediate temperature (20 to 30°C) compared to those foraging at the extreme of the range (15.9°C and 32.8°C). However, there was no difference in offspring sex-ratio and clutch size between temperature treatments. Mechanisms of host acceptance within a patch differed between temperatures, especially at 32.8°C where females used ovipositor insertion rather than antennal contact to assess whether a host was already parasitized or not, suggesting that host handling and chemical cues detection were probably constrained at high temperature. Females spent less time on the host patch with increasing temperatures, but temperature had no effect on patch-leaving rules. Our results show that foraging A. listronoti females behave better than expected at sub-optimal temperatures, but worse than expected at supra-optimal temperatures. This could impair parasitoid performance under ongoing climate change.
format	article
author	Julie Augustin Guy Boivin Gaétan Bourgeois Jacques Brodeur
author_facet	Julie Augustin Guy Boivin Gaétan Bourgeois Jacques Brodeur
author_sort	Julie Augustin
title	The effect of temperature on host patch exploitation by an egg parasitoid.
title_short	The effect of temperature on host patch exploitation by an egg parasitoid.
title_full	The effect of temperature on host patch exploitation by an egg parasitoid.
title_fullStr	The effect of temperature on host patch exploitation by an egg parasitoid.
title_full_unstemmed	The effect of temperature on host patch exploitation by an egg parasitoid.
title_sort	effect of temperature on host patch exploitation by an egg parasitoid.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/b7859c7bdb1343ba8af93058884b3973
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The effect of temperature on host patch exploitation by an egg parasitoid.

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