The influence of temperature and host availability on the host exploitation strategies of sexual and asexual parasitic wasps of the same species
In the hymenopteran parasitoid Venturia canescens, asexual (obligate thelytoky not induced by Wolbachia bacteria) and sexual (arrhenotokous) wasps coexist in field conditions despite the demographic cost incurred due to the production of males by sexual females. Arrhenotoky predominates in field con...
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todo:paper_00298549_v148_n1_p153_Amat2023-10-03T14:39:37Z The influence of temperature and host availability on the host exploitation strategies of sexual and asexual parasitic wasps of the same species Amat, I. Castelo, M. Desouhant, E. Bernstein, C. Habitat specialisation Patch-leaving decision Proportional hazards model Reproduction modes' coexistence Venturia canescens behavioral ecology exploitation parasite relative abundance spatial distribution survey animal animal behavior article asexual reproduction egg laying female host parasite interaction Lepidoptera parasitology physiology reproduction temperature wasp Animals Behavior, Animal Female Host-Parasite Relations Lepidoptera Oviposition Reproduction Reproduction, Asexual Temperature Wasps Bacteria (microorganisms) Hymenoptera Venturia canescens Vespoidea Wolbachia In the hymenopteran parasitoid Venturia canescens, asexual (obligate thelytoky not induced by Wolbachia bacteria) and sexual (arrhenotokous) wasps coexist in field conditions despite the demographic cost incurred due to the production of males by sexual females. Arrhenotoky predominates in field conditions, whereas populations in indoor conditions (mills, granaries) are exclusively thelytokous. These differences in the relative abundance of the two modes of reproduction between environments suggest that the individuals of each reproductive mode may have developed strategies adapted to the conditions prevailing in each kind of habitat. The two environments contrast in temperature variability and in the spatial heterogeneity of host availability. In this study, we considered the combined effect of temperature and host availability on host patch exploitation by thelytokous and arrhenotokous V. canescens. As expected, arrhenotokous females were more sensitive to temperature changes. If the temperature decreased before foraging, they remained longer and exploited patches more thoroughly. This is consistent with the expected behaviour of parasitoids in response to signs of unfavourable conditions that entail increasing risk of time limitation or a reduced probability of attaining further patches. Both arrhenotokous and thelytokous females increased patch exploitation with host availability. However, unexpectedly, we found no difference in the way the two types of wasp responded to differences in host availability. Differences in the strategies adopted under different environmental conditions may indicate divergence of niche-specific life history traits between the two modes of reproduction. Niche displacement may partly account for the coexistence of these two modes of reproduction at a geographical scale. © Springer-Verlag 2006. Fil:Castelo, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00298549_v148_n1_p153_Amat |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Habitat specialisation Patch-leaving decision Proportional hazards model Reproduction modes' coexistence Venturia canescens behavioral ecology exploitation parasite relative abundance spatial distribution survey animal animal behavior article asexual reproduction egg laying female host parasite interaction Lepidoptera parasitology physiology reproduction temperature wasp Animals Behavior, Animal Female Host-Parasite Relations Lepidoptera Oviposition Reproduction Reproduction, Asexual Temperature Wasps Bacteria (microorganisms) Hymenoptera Venturia canescens Vespoidea Wolbachia |
| spellingShingle |
Habitat specialisation Patch-leaving decision Proportional hazards model Reproduction modes' coexistence Venturia canescens behavioral ecology exploitation parasite relative abundance spatial distribution survey animal animal behavior article asexual reproduction egg laying female host parasite interaction Lepidoptera parasitology physiology reproduction temperature wasp Animals Behavior, Animal Female Host-Parasite Relations Lepidoptera Oviposition Reproduction Reproduction, Asexual Temperature Wasps Bacteria (microorganisms) Hymenoptera Venturia canescens Vespoidea Wolbachia Amat, I. Castelo, M. Desouhant, E. Bernstein, C. The influence of temperature and host availability on the host exploitation strategies of sexual and asexual parasitic wasps of the same species |
| topic_facet |
Habitat specialisation Patch-leaving decision Proportional hazards model Reproduction modes' coexistence Venturia canescens behavioral ecology exploitation parasite relative abundance spatial distribution survey animal animal behavior article asexual reproduction egg laying female host parasite interaction Lepidoptera parasitology physiology reproduction temperature wasp Animals Behavior, Animal Female Host-Parasite Relations Lepidoptera Oviposition Reproduction Reproduction, Asexual Temperature Wasps Bacteria (microorganisms) Hymenoptera Venturia canescens Vespoidea Wolbachia |
| description |
In the hymenopteran parasitoid Venturia canescens, asexual (obligate thelytoky not induced by Wolbachia bacteria) and sexual (arrhenotokous) wasps coexist in field conditions despite the demographic cost incurred due to the production of males by sexual females. Arrhenotoky predominates in field conditions, whereas populations in indoor conditions (mills, granaries) are exclusively thelytokous. These differences in the relative abundance of the two modes of reproduction between environments suggest that the individuals of each reproductive mode may have developed strategies adapted to the conditions prevailing in each kind of habitat. The two environments contrast in temperature variability and in the spatial heterogeneity of host availability. In this study, we considered the combined effect of temperature and host availability on host patch exploitation by thelytokous and arrhenotokous V. canescens. As expected, arrhenotokous females were more sensitive to temperature changes. If the temperature decreased before foraging, they remained longer and exploited patches more thoroughly. This is consistent with the expected behaviour of parasitoids in response to signs of unfavourable conditions that entail increasing risk of time limitation or a reduced probability of attaining further patches. Both arrhenotokous and thelytokous females increased patch exploitation with host availability. However, unexpectedly, we found no difference in the way the two types of wasp responded to differences in host availability. Differences in the strategies adopted under different environmental conditions may indicate divergence of niche-specific life history traits between the two modes of reproduction. Niche displacement may partly account for the coexistence of these two modes of reproduction at a geographical scale. © Springer-Verlag 2006. |
| format |
JOUR |
| author |
Amat, I. Castelo, M. Desouhant, E. Bernstein, C. |
| author_facet |
Amat, I. Castelo, M. Desouhant, E. Bernstein, C. |
| author_sort |
Amat, I. |
| title |
The influence of temperature and host availability on the host exploitation strategies of sexual and asexual parasitic wasps of the same species |
| title_short |
The influence of temperature and host availability on the host exploitation strategies of sexual and asexual parasitic wasps of the same species |
| title_full |
The influence of temperature and host availability on the host exploitation strategies of sexual and asexual parasitic wasps of the same species |
| title_fullStr |
The influence of temperature and host availability on the host exploitation strategies of sexual and asexual parasitic wasps of the same species |
| title_full_unstemmed |
The influence of temperature and host availability on the host exploitation strategies of sexual and asexual parasitic wasps of the same species |
| title_sort |
influence of temperature and host availability on the host exploitation strategies of sexual and asexual parasitic wasps of the same species |
| url |
http://hdl.handle.net/20.500.12110/paper_00298549_v148_n1_p153_Amat |
| work_keys_str_mv |
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