Conspecific avoidance during foraging in Venturia canescens (Hymenoptera: Ichneumonidae): The roles of host presence and conspecific densities

We explored the effects of the presence of conspecifics on host patch choice decisions made by the parasitoid Venturia canescens. Different odor sources were located in plastic boxes at the end of each arm of a glass Y-tube olfactometer. In a set of experiments, odor sources were either (a) host kai...

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Autores principales:	Castelo, M.K., Corley, J.C., Desouhant, E.
Formato:	JOUR
Materias:	Host-parasitoid interactions Intraspecific competition Olfactory foraging behavior Hymenoptera Ichneumonidae Venturia canescens Vespidae
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_08927553_v16_n2_p307_Castelo
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_08927553_v16_n2_p307_Castelo
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spelling	todo:paper_08927553_v16_n2_p307_Castelo2023-10-03T15:41:41Z Conspecific avoidance during foraging in Venturia canescens (Hymenoptera: Ichneumonidae): The roles of host presence and conspecific densities Castelo, M.K. Corley, J.C. Desouhant, E. Host-parasitoid interactions Intraspecific competition Olfactory foraging behavior Hymenoptera Ichneumonidae Venturia canescens Venturia canescens Vespidae We explored the effects of the presence of conspecifics on host patch choice decisions made by the parasitoid Venturia canescens. Different odor sources were located in plastic boxes at the end of each arm of a glass Y-tube olfactometer. In a set of experiments, odor sources were either (a) host kairomone patches with or without conspecifics (5 or 20) or (b) two odor sources located in successive boxes (a host kairomone patch and a patch with 20 conspecifics in one arm versus a host patch and an empty patch in the other). Our results indicate that V. canescens avoids competition only at high conspecific densities. Avoidance occurs only when foraging wasps perceive the combined odors from host kairomones and conspecific females. Separating the host patch from conspecific parasitoids does not perturb avoidance behavior. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_08927553_v16_n2_p307_Castelo
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Host-parasitoid interactions Intraspecific competition Olfactory foraging behavior Hymenoptera Ichneumonidae Venturia canescens Venturia canescens Vespidae
spellingShingle	Host-parasitoid interactions Intraspecific competition Olfactory foraging behavior Hymenoptera Ichneumonidae Venturia canescens Venturia canescens Vespidae Castelo, M.K. Corley, J.C. Desouhant, E. Conspecific avoidance during foraging in Venturia canescens (Hymenoptera: Ichneumonidae): The roles of host presence and conspecific densities
topic_facet	Host-parasitoid interactions Intraspecific competition Olfactory foraging behavior Hymenoptera Ichneumonidae Venturia canescens Venturia canescens Vespidae
description	We explored the effects of the presence of conspecifics on host patch choice decisions made by the parasitoid Venturia canescens. Different odor sources were located in plastic boxes at the end of each arm of a glass Y-tube olfactometer. In a set of experiments, odor sources were either (a) host kairomone patches with or without conspecifics (5 or 20) or (b) two odor sources located in successive boxes (a host kairomone patch and a patch with 20 conspecifics in one arm versus a host patch and an empty patch in the other). Our results indicate that V. canescens avoids competition only at high conspecific densities. Avoidance occurs only when foraging wasps perceive the combined odors from host kairomones and conspecific females. Separating the host patch from conspecific parasitoids does not perturb avoidance behavior.
format	JOUR
author	Castelo, M.K. Corley, J.C. Desouhant, E.
author_facet	Castelo, M.K. Corley, J.C. Desouhant, E.
author_sort	Castelo, M.K.
title	Conspecific avoidance during foraging in Venturia canescens (Hymenoptera: Ichneumonidae): The roles of host presence and conspecific densities
title_short	Conspecific avoidance during foraging in Venturia canescens (Hymenoptera: Ichneumonidae): The roles of host presence and conspecific densities
title_full	Conspecific avoidance during foraging in Venturia canescens (Hymenoptera: Ichneumonidae): The roles of host presence and conspecific densities
title_fullStr	Conspecific avoidance during foraging in Venturia canescens (Hymenoptera: Ichneumonidae): The roles of host presence and conspecific densities
title_full_unstemmed	Conspecific avoidance during foraging in Venturia canescens (Hymenoptera: Ichneumonidae): The roles of host presence and conspecific densities
title_sort	conspecific avoidance during foraging in venturia canescens (hymenoptera: ichneumonidae): the roles of host presence and conspecific densities
url	http://hdl.handle.net/20.500.12110/paper_08927553_v16_n2_p307_Castelo
work_keys_str_mv	AT castelomk conspecificavoidanceduringforaginginventuriacanescenshymenopteraichneumonidaetherolesofhostpresenceandconspecificdensities AT corleyjc conspecificavoidanceduringforaginginventuriacanescenshymenopteraichneumonidaetherolesofhostpresenceandconspecificdensities AT desouhante conspecificavoidanceduringforaginginventuriacanescenshymenopteraichneumonidaetherolesofhostpresenceandconspecificdensities
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Conspecific avoidance during foraging in Venturia canescens (Hymenoptera: Ichneumonidae): The roles of host presence and conspecific densities

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