Fungal ectoparasites increase winter mortality of ladybird hosts despite limited effects on their immune system

Autores
Knapp, Michal; Řeřicha, Michal; Haelewaters, Danny; González, Ezequiel
Año de publicación
2022
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Winter represents a challenging period for insects inhabiting temperate regions. A plethora of studies have investigated how environmental conditions such as temperature affect insect overwintering success. However, only a few studies have focused on biotic factors and the mechanisms affecting the overwintering performance of insects. Here, we investigated the effects of the parasitic fungus Hesperomyces virescens on the overwintering performance and immune system functioning of the invasive ladybird Harmonia axyridis. Winter survival was significantly lower for infected than for uninfected ladybirds. Body mass loss during overwintering tends to be higher for infected individuals compared to uninfected ones and for larger ladybirds. In addition, parasitic infection reduced post-winter longevity without food in male but not female ladybirds. Total haemocyte and protein concentration as well as antimicrobial activity against Escherichia coli significantly decreased during ladybird overwintering. However, haemolymph parameters were only poorly affected by Hesperomyces infection, with the exception of antimicrobial activity against E. coli that tended to be higher in infected ladybirds. Interestingly, none of the pre-winter haemolymph parameters were good predictors of ladybird winter survival. Overall, our results indicate that energy exhaustion unrelated to immune system challenge is the most probable explanation for increased overwintering mortality in infected ladybirds.
Fil: Knapp, Michal. Czech University Of Life Sciences Prague; República Checa
Fil: Řeřicha, Michal. Czech University Of Life Sciences Prague; República Checa
Fil: Haelewaters, Danny. University of Ghent; Bélgica
Fil: González, Ezequiel. Czech University Of Life Sciences Prague; República Checa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; Argentina
Materia
BODY CONDITION
ECOPHYSIOLOGY
MICROSPORIDIA LOAD
PATHOGEN
SEXUALLY TRANSMITTED DISEASES
STRESS RESISTANCE
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/200617
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Fungal ectoparasites increase winter mortality of ladybird hosts despite limited effects on their immune systemKnapp, MichalŘeřicha, MichalHaelewaters, DannyGonzález, EzequielBODY CONDITIONECOPHYSIOLOGYMICROSPORIDIA LOADPATHOGENSEXUALLY TRANSMITTED DISEASESSTRESS RESISTANCEhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Winter represents a challenging period for insects inhabiting temperate regions. A plethora of studies have investigated how environmental conditions such as temperature affect insect overwintering success. However, only a few studies have focused on biotic factors and the mechanisms affecting the overwintering performance of insects. Here, we investigated the effects of the parasitic fungus Hesperomyces virescens on the overwintering performance and immune system functioning of the invasive ladybird Harmonia axyridis. Winter survival was significantly lower for infected than for uninfected ladybirds. Body mass loss during overwintering tends to be higher for infected individuals compared to uninfected ones and for larger ladybirds. In addition, parasitic infection reduced post-winter longevity without food in male but not female ladybirds. Total haemocyte and protein concentration as well as antimicrobial activity against Escherichia coli significantly decreased during ladybird overwintering. However, haemolymph parameters were only poorly affected by Hesperomyces infection, with the exception of antimicrobial activity against E. coli that tended to be higher in infected ladybirds. Interestingly, none of the pre-winter haemolymph parameters were good predictors of ladybird winter survival. Overall, our results indicate that energy exhaustion unrelated to immune system challenge is the most probable explanation for increased overwintering mortality in infected ladybirds.Fil: Knapp, Michal. Czech University Of Life Sciences Prague; República ChecaFil: Řeřicha, Michal. Czech University Of Life Sciences Prague; República ChecaFil: Haelewaters, Danny. University of Ghent; BélgicaFil: González, Ezequiel. Czech University Of Life Sciences Prague; República Checa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; ArgentinaThe Royal Society2022-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/200617Knapp, Michal; Řeřicha, Michal; Haelewaters, Danny; González, Ezequiel; Fungal ectoparasites increase winter mortality of ladybird hosts despite limited effects on their immune system; The Royal Society; Proceedings of the Royal Society of London. Series B: Biological Sciences; 289; 1971; 3-2022; 1-100962-84521471-2954CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1098/rspb.2021.2538info:eu-repo/semantics/altIdentifier/url/https://royalsocietypublishing.org/doi/10.1098/rspb.2021.2538info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:27:45Zoai:ri.conicet.gov.ar:11336/200617instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:27:45.678CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Fungal ectoparasites increase winter mortality of ladybird hosts despite limited effects on their immune system
title Fungal ectoparasites increase winter mortality of ladybird hosts despite limited effects on their immune system
spellingShingle Fungal ectoparasites increase winter mortality of ladybird hosts despite limited effects on their immune system
Knapp, Michal
BODY CONDITION
ECOPHYSIOLOGY
MICROSPORIDIA LOAD
PATHOGEN
SEXUALLY TRANSMITTED DISEASES
STRESS RESISTANCE
title_short Fungal ectoparasites increase winter mortality of ladybird hosts despite limited effects on their immune system
title_full Fungal ectoparasites increase winter mortality of ladybird hosts despite limited effects on their immune system
title_fullStr Fungal ectoparasites increase winter mortality of ladybird hosts despite limited effects on their immune system
title_full_unstemmed Fungal ectoparasites increase winter mortality of ladybird hosts despite limited effects on their immune system
title_sort Fungal ectoparasites increase winter mortality of ladybird hosts despite limited effects on their immune system
dc.creator.none.fl_str_mv Knapp, Michal
Řeřicha, Michal
Haelewaters, Danny
González, Ezequiel
author Knapp, Michal
author_facet Knapp, Michal
Řeřicha, Michal
Haelewaters, Danny
González, Ezequiel
author_role author
author2 Řeřicha, Michal
Haelewaters, Danny
González, Ezequiel
author2_role author
author
author
dc.subject.none.fl_str_mv BODY CONDITION
ECOPHYSIOLOGY
MICROSPORIDIA LOAD
PATHOGEN
SEXUALLY TRANSMITTED DISEASES
STRESS RESISTANCE
topic BODY CONDITION
ECOPHYSIOLOGY
MICROSPORIDIA LOAD
PATHOGEN
SEXUALLY TRANSMITTED DISEASES
STRESS RESISTANCE
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Winter represents a challenging period for insects inhabiting temperate regions. A plethora of studies have investigated how environmental conditions such as temperature affect insect overwintering success. However, only a few studies have focused on biotic factors and the mechanisms affecting the overwintering performance of insects. Here, we investigated the effects of the parasitic fungus Hesperomyces virescens on the overwintering performance and immune system functioning of the invasive ladybird Harmonia axyridis. Winter survival was significantly lower for infected than for uninfected ladybirds. Body mass loss during overwintering tends to be higher for infected individuals compared to uninfected ones and for larger ladybirds. In addition, parasitic infection reduced post-winter longevity without food in male but not female ladybirds. Total haemocyte and protein concentration as well as antimicrobial activity against Escherichia coli significantly decreased during ladybird overwintering. However, haemolymph parameters were only poorly affected by Hesperomyces infection, with the exception of antimicrobial activity against E. coli that tended to be higher in infected ladybirds. Interestingly, none of the pre-winter haemolymph parameters were good predictors of ladybird winter survival. Overall, our results indicate that energy exhaustion unrelated to immune system challenge is the most probable explanation for increased overwintering mortality in infected ladybirds.
Fil: Knapp, Michal. Czech University Of Life Sciences Prague; República Checa
Fil: Řeřicha, Michal. Czech University Of Life Sciences Prague; República Checa
Fil: Haelewaters, Danny. University of Ghent; Bélgica
Fil: González, Ezequiel. Czech University Of Life Sciences Prague; República Checa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; Argentina
description Winter represents a challenging period for insects inhabiting temperate regions. A plethora of studies have investigated how environmental conditions such as temperature affect insect overwintering success. However, only a few studies have focused on biotic factors and the mechanisms affecting the overwintering performance of insects. Here, we investigated the effects of the parasitic fungus Hesperomyces virescens on the overwintering performance and immune system functioning of the invasive ladybird Harmonia axyridis. Winter survival was significantly lower for infected than for uninfected ladybirds. Body mass loss during overwintering tends to be higher for infected individuals compared to uninfected ones and for larger ladybirds. In addition, parasitic infection reduced post-winter longevity without food in male but not female ladybirds. Total haemocyte and protein concentration as well as antimicrobial activity against Escherichia coli significantly decreased during ladybird overwintering. However, haemolymph parameters were only poorly affected by Hesperomyces infection, with the exception of antimicrobial activity against E. coli that tended to be higher in infected ladybirds. Interestingly, none of the pre-winter haemolymph parameters were good predictors of ladybird winter survival. Overall, our results indicate that energy exhaustion unrelated to immune system challenge is the most probable explanation for increased overwintering mortality in infected ladybirds.
publishDate 2022
dc.date.none.fl_str_mv 2022-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/200617
Knapp, Michal; Řeřicha, Michal; Haelewaters, Danny; González, Ezequiel; Fungal ectoparasites increase winter mortality of ladybird hosts despite limited effects on their immune system; The Royal Society; Proceedings of the Royal Society of London. Series B: Biological Sciences; 289; 1971; 3-2022; 1-10
0962-8452
1471-2954
CONICET Digital
CONICET
url http://hdl.handle.net/11336/200617
identifier_str_mv Knapp, Michal; Řeřicha, Michal; Haelewaters, Danny; González, Ezequiel; Fungal ectoparasites increase winter mortality of ladybird hosts despite limited effects on their immune system; The Royal Society; Proceedings of the Royal Society of London. Series B: Biological Sciences; 289; 1971; 3-2022; 1-10
0962-8452
1471-2954
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1098/rspb.2021.2538
info:eu-repo/semantics/altIdentifier/url/https://royalsocietypublishing.org/doi/10.1098/rspb.2021.2538
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv The Royal Society
publisher.none.fl_str_mv The Royal Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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