Ecdysteroids affect female reproductive status and outcome of contest over hosts in the parasitoid wasp Eupelmus vuilleti
Copyright © 2020 Elsevier Inc. All rights reserved..
Ecdysteroids are a family of insect hormones that may play a role in modulating aggressive behavior in reproductive contexts. In Hymenoptera, the few studies investigating the link between ecdysteroid titers, reproduction and aggressiveness during contests concern solely eusocial species. Here, we explored whether ecdysteroid titers influenced female reproductive status as well as aggressiveness and resolution of conflict in a solitary ectoparasitoid, Eupelmus vuilleti (Hymenoptera: Eupelmidae). Eupelmus vuilleti females parasitize and feed upon juvenile stages of Callosobruchus maculatus (Coleoptera: Bruchidae). When two E. vuilleti females are simultaneously present on a patch, they tend to protect the host they exploit by displaying aggressive behaviors towards conspecific competitors. To our knowledge, nothing is known about the association between ecdysteroids and aggressiveness or the outcome of contests for host access in solitary insects. First, we quantified ecdysteroid titers that naturally circulate in females without fighting experience and after a contest over host access. Ecdysteroid titers measured after the contest did not correlate with female aggressiveness during the contest, but winner wasps had higher titers than both losers and females that did not fight. Then, we manipulated hormone titers via injection: ecdysone favored egg maturation (i.e., gonadotropic effect) within 24 h and increased almost immediately the females' probability of winning host access without affecting their aggressiveness. Our results represent an important step in understanding how hormones, such as ecdysteroids, mediate insect behavior during intraspecific competition.
| Medienart: |
E-Artikel |
|---|
| Erscheinungsjahr: |
2020 |
|---|---|
| Erschienen: |
2020 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:125 |
|---|---|
| Enthalten in: |
Hormones and behavior - 125(2020) vom: 25. Sept., Seite 104819 |
| Sprache: |
Englisch |
|---|
| Beteiligte Personen: |
Mathiron, Anthony G E [VerfasserIn] |
|---|
| Links: |
|---|
| Themen: |
Aggressive behaviors |
|---|
| Anmerkungen: |
Date Completed 20.04.2021 Date Revised 20.04.2021 published: Print-Electronic Citation Status MEDLINE |
|---|
| doi: |
10.1016/j.yhbeh.2020.104819 |
|---|
| funding: |
|
|---|---|
| Förderinstitution / Projekttitel: |
|
| PPN (Katalog-ID): |
NLM312591713 |
|---|
| LEADER | 01000naa a22002652 4500 | ||
|---|---|---|---|
| 001 | NLM312591713 | ||
| 003 | DE-627 | ||
| 005 | 20231225144736.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 231225s2020 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1016/j.yhbeh.2020.104819 |2 doi | |
| 028 | 5 | 2 | |a pubmed24n1041.xml |
| 035 | |a (DE-627)NLM312591713 | ||
| 035 | |a (NLM)32682853 | ||
| 035 | |a (PII)S0018-506X(20)30145-8 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
| 041 | |a eng | ||
| 100 | 1 | |a Mathiron, Anthony G E |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Ecdysteroids affect female reproductive status and outcome of contest over hosts in the parasitoid wasp Eupelmus vuilleti |
| 264 | 1 | |c 2020 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ƒaComputermedien |b c |2 rdamedia | ||
| 338 | |a ƒa Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Date Completed 20.04.2021 | ||
| 500 | |a Date Revised 20.04.2021 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Copyright © 2020 Elsevier Inc. All rights reserved. | ||
| 520 | |a Ecdysteroids are a family of insect hormones that may play a role in modulating aggressive behavior in reproductive contexts. In Hymenoptera, the few studies investigating the link between ecdysteroid titers, reproduction and aggressiveness during contests concern solely eusocial species. Here, we explored whether ecdysteroid titers influenced female reproductive status as well as aggressiveness and resolution of conflict in a solitary ectoparasitoid, Eupelmus vuilleti (Hymenoptera: Eupelmidae). Eupelmus vuilleti females parasitize and feed upon juvenile stages of Callosobruchus maculatus (Coleoptera: Bruchidae). When two E. vuilleti females are simultaneously present on a patch, they tend to protect the host they exploit by displaying aggressive behaviors towards conspecific competitors. To our knowledge, nothing is known about the association between ecdysteroids and aggressiveness or the outcome of contests for host access in solitary insects. First, we quantified ecdysteroid titers that naturally circulate in females without fighting experience and after a contest over host access. Ecdysteroid titers measured after the contest did not correlate with female aggressiveness during the contest, but winner wasps had higher titers than both losers and females that did not fight. Then, we manipulated hormone titers via injection: ecdysone favored egg maturation (i.e., gonadotropic effect) within 24 h and increased almost immediately the females' probability of winning host access without affecting their aggressiveness. Our results represent an important step in understanding how hormones, such as ecdysteroids, mediate insect behavior during intraspecific competition | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a Aggressive behaviors | |
| 650 | 4 | |a Conflict resolution | |
| 650 | 4 | |a Ecdysteroids | |
| 650 | 4 | |a Egg maturation | |
| 650 | 4 | |a Hymenopteran parasitoid | |
| 650 | 7 | |a Ecdysteroids |2 NLM | |
| 700 | 1 | |a Dixneuf, Charly |e verfasserin |4 aut | |
| 700 | 1 | |a Mondy, Nathalie |e verfasserin |4 aut | |
| 700 | 1 | |a Lécureuil, Charlotte |e verfasserin |4 aut | |
| 700 | 1 | |a Earley, Ryan L |e verfasserin |4 aut | |
| 700 | 1 | |a Goubault, Marlène |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Hormones and behavior |d 1972 |g 125(2020) vom: 25. Sept., Seite 104819 |w (DE-627)NLM000202312 |x 1095-6867 |7 nnns |
| 773 | 1 | 8 | |g volume:125 |g year:2020 |g day:25 |g month:09 |g pages:104819 |
| 856 | 4 | 0 | |u http://dx.doi.org/10.1016/j.yhbeh.2020.104819 |3 Volltext |
| 912 | |a GBV_USEFLAG_A | ||
| 912 | |a GBV_NLM | ||
| 951 | |a AR | ||
| 952 | |d 125 |j 2020 |b 25 |c 09 |h 104819 | ||