Cargando…
Direct and indirect effect of cannibalism and intraguild predation in the two sibling Harmonia ladybird beetles
In this study, we focused on the direct (i.e., predation) and indirect (i.e., potential threat from coexisting with a larger individual) effects of cannibalism and intraguild predation (IGP) during larval stages of two sibling ladybird beetles. These effects play an important role in the coexistence...
Autores principales: | , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7319143/ https://www.ncbi.nlm.nih.gov/pubmed/32607199 http://dx.doi.org/10.1002/ece3.6326 |
_version_ | 1783550996152057856 |
---|---|
author | Rasekh, Arash Osawa, Naoya |
author_facet | Rasekh, Arash Osawa, Naoya |
author_sort | Rasekh, Arash |
collection | PubMed |
description | In this study, we focused on the direct (i.e., predation) and indirect (i.e., potential threat from coexisting with a larger individual) effects of cannibalism and intraguild predation (IGP) during larval stages of two sibling ladybird beetles. These effects play an important role in the coexistence of the generalist–common Harmonia axyridis and specialist–rare H. yedoensis (Coleoptera: Coccinellidae). Direct predation effect of cannibalism and IGP was asymmetric in the two sibling ladybird beetles; the fourth instar larvae of H. axyridis were better intraguild predators than cannibals, while the reverse was true in the larvae of H. yedoensis. Neither cannibalism nor IGP significantly affected female body weight in either species. Larval H. axyridis surviving exposure to cannibalism or IGP had a reduced number of ovarioles as adults, whereas adult H. yedoensis ovarioles were not affected. For the indirect effects, longer developmental times in males and females and a lower total number of ovarioles in females were detected in H. axyridis. In H. yedoensis, shorter developmental time of males, lighter adult weight and fewer total ovarioles in females were observed. Olfactometer choice experiments clarified that the fourth instar larvae of H. axyridis avoided the first instar conspecific larvae, while those of H. yedoensis were attracted to the odors from H. axyridis and conspecifics. Thus, H. axyridis has an avoidance mechanism only for cannibalism but not for IGP, whereas H. yedoensis does not have any avoidance mechanism. These different behaviors in the direct and indirect effects of cannibalism and IGP observed in the laboratory may play important roles in the coexistence of generalist–common H. axyridis and specialist–rare H. yedoensis in natural conditions, compensating for the large handicap of H. yedoensis at reproductive interference from H. axyridis. |
format | Online Article Text |
id | pubmed-7319143 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-73191432020-06-29 Direct and indirect effect of cannibalism and intraguild predation in the two sibling Harmonia ladybird beetles Rasekh, Arash Osawa, Naoya Ecol Evol Original Research In this study, we focused on the direct (i.e., predation) and indirect (i.e., potential threat from coexisting with a larger individual) effects of cannibalism and intraguild predation (IGP) during larval stages of two sibling ladybird beetles. These effects play an important role in the coexistence of the generalist–common Harmonia axyridis and specialist–rare H. yedoensis (Coleoptera: Coccinellidae). Direct predation effect of cannibalism and IGP was asymmetric in the two sibling ladybird beetles; the fourth instar larvae of H. axyridis were better intraguild predators than cannibals, while the reverse was true in the larvae of H. yedoensis. Neither cannibalism nor IGP significantly affected female body weight in either species. Larval H. axyridis surviving exposure to cannibalism or IGP had a reduced number of ovarioles as adults, whereas adult H. yedoensis ovarioles were not affected. For the indirect effects, longer developmental times in males and females and a lower total number of ovarioles in females were detected in H. axyridis. In H. yedoensis, shorter developmental time of males, lighter adult weight and fewer total ovarioles in females were observed. Olfactometer choice experiments clarified that the fourth instar larvae of H. axyridis avoided the first instar conspecific larvae, while those of H. yedoensis were attracted to the odors from H. axyridis and conspecifics. Thus, H. axyridis has an avoidance mechanism only for cannibalism but not for IGP, whereas H. yedoensis does not have any avoidance mechanism. These different behaviors in the direct and indirect effects of cannibalism and IGP observed in the laboratory may play important roles in the coexistence of generalist–common H. axyridis and specialist–rare H. yedoensis in natural conditions, compensating for the large handicap of H. yedoensis at reproductive interference from H. axyridis. John Wiley and Sons Inc. 2020-06-09 /pmc/articles/PMC7319143/ /pubmed/32607199 http://dx.doi.org/10.1002/ece3.6326 Text en © 2020 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Research Rasekh, Arash Osawa, Naoya Direct and indirect effect of cannibalism and intraguild predation in the two sibling Harmonia ladybird beetles |
title | Direct and indirect effect of cannibalism and intraguild predation in the two sibling Harmonia ladybird beetles |
title_full | Direct and indirect effect of cannibalism and intraguild predation in the two sibling Harmonia ladybird beetles |
title_fullStr | Direct and indirect effect of cannibalism and intraguild predation in the two sibling Harmonia ladybird beetles |
title_full_unstemmed | Direct and indirect effect of cannibalism and intraguild predation in the two sibling Harmonia ladybird beetles |
title_short | Direct and indirect effect of cannibalism and intraguild predation in the two sibling Harmonia ladybird beetles |
title_sort | direct and indirect effect of cannibalism and intraguild predation in the two sibling harmonia ladybird beetles |
topic | Original Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7319143/ https://www.ncbi.nlm.nih.gov/pubmed/32607199 http://dx.doi.org/10.1002/ece3.6326 |
work_keys_str_mv | AT rasekharash directandindirecteffectofcannibalismandintraguildpredationinthetwosiblingharmonialadybirdbeetles AT osawanaoya directandindirecteffectofcannibalismandintraguildpredationinthetwosiblingharmonialadybirdbeetles |