Patch exploitation by non‐aggressive parasitoids under intra‐ and interspecific competition. Issue 1 (20th March 2016)
- Record Type:
- Journal Article
- Title:
- Patch exploitation by non‐aggressive parasitoids under intra‐ and interspecific competition. Issue 1 (20th March 2016)
- Main Title:
- Patch exploitation by non‐aggressive parasitoids under intra‐ and interspecific competition
- Authors:
- Robert, Félix‐Antoine
Brodeur, Jacques
Boivin, Guy - Abstract:
- Abstract: The behavioral strategies evolved by insect parasitoids to optimize their foraging efforts have been the subject of many theoretical and empirical studies. However, the effects competition may have on these strategies, especially for species that do not engage in antagonistic behaviors, have received little attention. The objective of this study was to evaluate the effects of intraspecific and interspecific competition on patch exploitation strategies by two non‐aggressive species, Trichogramma pintoi Voegelé and Trichogramma minutum Riley (Hymenoptera: Trichogrammatidae), both generalist egg parasitoids. We analyzed the patch residence times of females, their patch‐leaving mechanisms, and the sex allocation of their progeny while foraging either alone, with an intraspecific competitor, or with an interspecific competitor. To some extent, each species responded differently to the presence of a competitor in the patch. Trichogramma pintoi females did not change their patch‐leaving mechanisms in response to competition and behaved as if under an exploitative competition regime, whereas T. minutum females did change their patch‐leaving mechanisms in response to competition and remained longer in the host patch than expected. Antennal rejection, and not oviposition, was the proximate behavioral mechanism underlying patch‐leaving decisions by both species. Neither species adjusted the sex allocation of their progeny in response to competition. These results indicateAbstract: The behavioral strategies evolved by insect parasitoids to optimize their foraging efforts have been the subject of many theoretical and empirical studies. However, the effects competition may have on these strategies, especially for species that do not engage in antagonistic behaviors, have received little attention. The objective of this study was to evaluate the effects of intraspecific and interspecific competition on patch exploitation strategies by two non‐aggressive species, Trichogramma pintoi Voegelé and Trichogramma minutum Riley (Hymenoptera: Trichogrammatidae), both generalist egg parasitoids. We analyzed the patch residence times of females, their patch‐leaving mechanisms, and the sex allocation of their progeny while foraging either alone, with an intraspecific competitor, or with an interspecific competitor. To some extent, each species responded differently to the presence of a competitor in the patch. Trichogramma pintoi females did not change their patch‐leaving mechanisms in response to competition and behaved as if under an exploitative competition regime, whereas T. minutum females did change their patch‐leaving mechanisms in response to competition and remained longer in the host patch than expected. Antennal rejection, and not oviposition, was the proximate behavioral mechanism underlying patch‐leaving decisions by both species. Neither species adjusted the sex allocation of their progeny in response to competition. These results indicate that the effects of competition differ even among closely related parasitoid species. … (more)
- Is Part Of:
- Entomologia experimentalis et applicata. Volume 159:Issue 1(2016:Apr.)
- Journal:
- Entomologia experimentalis et applicata
- Issue:
- Volume 159:Issue 1(2016:Apr.)
- Issue Display:
- Volume 159, Issue 1 (2016)
- Year:
- 2016
- Volume:
- 159
- Issue:
- 1
- Issue Sort Value:
- 2016-0159-0001-0000
- Page Start:
- 92
- Page End:
- 101
- Publication Date:
- 2016-03-20
- Subjects:
- non‐aggressive competition -- patch time allocation -- progeny sex allocation -- Trichogramma pintoi -- Trichogramma minutum -- Hymenoptera -- Trichogrammatidae
Entomology -- Periodicals
595.7 - Journal URLs:
- http://www.blackwell-synergy.com/toc/eea ↗
http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1570-7458 ↗
http://onlinelibrary.wiley.com/ ↗ - DOI:
- 10.1111/eea.12429 ↗
- Languages:
- English
- ISSNs:
- 0013-8703
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 3776.750000
British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 370.xml