Host quality does not dictate the outcome of intrinsic competition between sympatric parasitoids: effect on their coexistence.
Herbivores are frequently attacked by several parasitoid species. During their growth, herbivores can differ in their suitability and quality for the developing parasitoids and, therefore, interfere in their competition for the shared host. Here, we report the first results on whether acceptance of...
| Autores principales: | , , , |
|---|---|
| Formato: | conferenceObject |
| Publicado: |
2018
|
| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.11939/6119 |
| _version_ | 1855032370301763584 |
|---|---|
| author | Cebolla, Ruth Urbaneja, Alberto Tena, Alejandro Bru, Pablo |
| author_browse | Bru, Pablo Cebolla, Ruth Tena, Alejandro Urbaneja, Alberto |
| author_facet | Cebolla, Ruth Urbaneja, Alberto Tena, Alejandro Bru, Pablo |
| author_sort | Cebolla, Ruth |
| collection | ReDivia |
| description | Herbivores are frequently attacked by several parasitoid species. During their growth, herbivores can differ in their suitability and quality for the developing parasitoids and, therefore, interfere in their competition for the shared host. Here, we report the first results on whether acceptance of heterospecific parasitized hosts and the outcome of competition is affected by host instar using two parasitoid species of the genus Aphytis (Hymenoptera: Aphelinidae), which coexist in several areas. Aphytis melinus DeBach laid more eggs (clutch size) and accepted significantly more hosts than A. chrysomphali (Mercet) when they encountered heterospecific parasitized hosts of the third instar (higher quality), whereas there were not significant differences in the second instar. The proportion of A. melinus progeny in multiparasitized hosts (outcome of competition) was significantly higher than that of A. chrysomphali and it was independent of the host instar and order of attack. Overall, A. melinus was a superior competitor than A. chrysomphali independently of the host instar attacked and our results show that their direct competition strongly contributes to the displacement of A. chrysomphali by A. melinus. Therefore, their coexistence can be only explained by climatic conditions and the plasticity of A. chrysomphali to use different host instars depending on A. melinus density, but not because of the superiority of A. melinus diminished in the second instar. |
| format | conferenceObject |
| id | ReDivia6119 |
| institution | Instituto Valenciano de Investigaciones Agrarias (IVIA) |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| record_format | dspace |
| spelling | ReDivia61192025-04-25T14:51:22Z Host quality does not dictate the outcome of intrinsic competition between sympatric parasitoids: effect on their coexistence. Cebolla, Ruth Urbaneja, Alberto Tena, Alejandro Bru, Pablo H10 Pests of plants Aphytis Aonidiella aurantii Interspecific competition Parasitism Herbivores are frequently attacked by several parasitoid species. During their growth, herbivores can differ in their suitability and quality for the developing parasitoids and, therefore, interfere in their competition for the shared host. Here, we report the first results on whether acceptance of heterospecific parasitized hosts and the outcome of competition is affected by host instar using two parasitoid species of the genus Aphytis (Hymenoptera: Aphelinidae), which coexist in several areas. Aphytis melinus DeBach laid more eggs (clutch size) and accepted significantly more hosts than A. chrysomphali (Mercet) when they encountered heterospecific parasitized hosts of the third instar (higher quality), whereas there were not significant differences in the second instar. The proportion of A. melinus progeny in multiparasitized hosts (outcome of competition) was significantly higher than that of A. chrysomphali and it was independent of the host instar and order of attack. Overall, A. melinus was a superior competitor than A. chrysomphali independently of the host instar attacked and our results show that their direct competition strongly contributes to the displacement of A. chrysomphali by A. melinus. Therefore, their coexistence can be only explained by climatic conditions and the plasticity of A. chrysomphali to use different host instars depending on A. melinus density, but not because of the superiority of A. melinus diminished in the second instar. 2018-05-16T15:40:33Z 2018-05-16T15:40:33Z 2015 conferenceObject Cebolla, R., Bru, P., Urbaneja, A. & Tena, A. (2017). Does host quality dictate the outcome of interference competition between sympatric parasitoids? Effects on their coexistence. Animal Behaviour, 127, 75-81. http://hdl.handle.net/20.500.11939/6119 10.1016/j.anbehav.2017.03.011 4th International Entomophagous Insects Conference. Torre del Mar, Málaga (España) electronico |
| spellingShingle | H10 Pests of plants Aphytis Aonidiella aurantii Interspecific competition Parasitism Cebolla, Ruth Urbaneja, Alberto Tena, Alejandro Bru, Pablo Host quality does not dictate the outcome of intrinsic competition between sympatric parasitoids: effect on their coexistence. |
| title | Host quality does not dictate the outcome of intrinsic competition between sympatric parasitoids: effect on their coexistence. |
| title_full | Host quality does not dictate the outcome of intrinsic competition between sympatric parasitoids: effect on their coexistence. |
| title_fullStr | Host quality does not dictate the outcome of intrinsic competition between sympatric parasitoids: effect on their coexistence. |
| title_full_unstemmed | Host quality does not dictate the outcome of intrinsic competition between sympatric parasitoids: effect on their coexistence. |
| title_short | Host quality does not dictate the outcome of intrinsic competition between sympatric parasitoids: effect on their coexistence. |
| title_sort | host quality does not dictate the outcome of intrinsic competition between sympatric parasitoids effect on their coexistence |
| topic | H10 Pests of plants Aphytis Aonidiella aurantii Interspecific competition Parasitism |
| url | http://hdl.handle.net/20.500.11939/6119 |
| work_keys_str_mv | AT cebollaruth hostqualitydoesnotdictatetheoutcomeofintrinsiccompetitionbetweensympatricparasitoidseffectontheircoexistence AT urbanejaalberto hostqualitydoesnotdictatetheoutcomeofintrinsiccompetitionbetweensympatricparasitoidseffectontheircoexistence AT tenaalejandro hostqualitydoesnotdictatetheoutcomeofintrinsiccompetitionbetweensympatricparasitoidseffectontheircoexistence AT brupablo hostqualitydoesnotdictatetheoutcomeofintrinsiccompetitionbetweensympatricparasitoidseffectontheircoexistence |