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The natural history of mites (Acari: Mesostigmata) associated with the white-spotted sawyer beetle (Coleoptera: Cerambycidae): diversity, phenology, host attachment, and sex bias

Published online by Cambridge University Press:  26 July 2012

Wayne Knee ,
Tammy Hartzenberg ,
Mark R. Forbes  and
Frédéric Beaulieu
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Abstract

Little is known about the acarofauna associated with wood-boring beetles in Canada, including long-horned beetles (Coleoptera: Cerambycidae). Herein, we assessed the prevalence, abundance, diversity, phenology, and attachment location of mesostigmatic mites (Acari: Mesostigmata) associated with Monochamus scutellatus (Say), and tested whether the abundance and prevalence of mites differed between male and female beetles. A total of 176 beetles were collected in two sites in eastern Ontario in 2008 and 2009 using Lindgren funnel traps baited with α-pinene and ethanol lures, and 71% of hosts had mesostigmatic mites. A total of 2486 mites were collected, representing eight species, four genera, and three families (Digamasellidae, Trematuridae, and Melicharidae). Average prevalence was variable across mite species, and the number of mites per infested beetle also varied across species. Many of the mite species collected in this study have been reported from other cerambycid species, as well as from other wood-boring beetles, such as bark beetles. There was no significant sex bias in the abundance or prevalence of mites between male and female M. scutellatus, which suggests that there is no selective advantage for mites to disperse on females. This study represents the first quantitative investigation of the mites associated with M. scutellatus in Canada.

Résumé

On connaît peu au sujet de la faune d'acariens associée aux scolytes au Canada, y compris celle associée aux longicornes (Coleoptera: Cerambycidae). Nous avons évalué la prévalence, l'abondance, la diversité, la phénologie et l'emplacement sur l'hôte des acariens mésostigmates (Acari: Mesostigmata) associés à Monochamus scutellatus (Say), et testé si l'abondance et la prévalence des acariens différaient entre les coléoptères mâles et femelles. Un total de 176 coléoptères a été récolté dans deux sites en Est de l'Ontario en 2008 et 2009 en utilisant des pièges à entonnoir Lindgren appâtés avec des leurres d’α-pinène et d’éthanol, et 71% des hôtes avait des acariens mésostigmates. Un total de 2486 acariens a été récolté, représentant huit espèces, quatre genres et trois familles (Digamasellidae, Trematuridae et Melicharidae). La prévalence moyenne varie selon les espèces d'acariens, et le nombre d'acariens par coléoptère infesté varie également selon les espèces. Plusieurs des espèces d'acariens récoltés durant cette étude ont été signalées sur d'autres espèces de cérambycidés, ainsi que sur d'autres coléoptères xylophages, comme les scolytes. Aucun biais significatif n'a été observé dans l'abondance ou la prévalence des acariens entre mâles et femelles M. scutellatus, ce qui suggère qu'il n'y a pas d'avantage sélectif pour les acariens à migrer sur des hôtes femelles. Cette étude représente le premier inventaire quantitatif des acariens associés à M. scutellatus au Canada.

Type
Original Article
Information
The Canadian Entomologist , Volume 144 , Issue 5 , October 2012 , pp. 711 - 719
Copyright
Copyright © Her Majesty the Queen in Right of Canada, as represented by the Minister of Agriculture and Agri-Food Canada 2012

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