Natural Prey and Digestion Times of Toxorhynchites rutilus (Diptera: Culicidae) in Southern Florida

Autores
Campos, Raul Ernesto; Lounibos, L. P.
Año de publicación
2000
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Natural prey of Toxorhynchites rutilus (Coquillett) were identified from gut contents of 941 larvae collected from treeholes and tires located in an oak-palm woodland in south Florida. Twenty taxa of aquatic prey were recognized in midgut remains, in addition to eggs of Diptera from three families. Ostracods and chironomids were the most abundant aquatic prey in predators from tires, and rotifers and copepods from treeholes. Mosquito larvae accounted for only 6% of prey items from treeholes and 5% from tires. Remains of terrestrial arthropods of nine insect orders plus mites and spiders were also identified, these prey having been captured from the water surface by T. rutilus larvae. An electivity coefficient, R, was calculated for dipterous prey of each predator instar. Significant heterogeneities among R values in tires were attributable, in part, to high electivity for certain mosquito species, especially Aedes albopictus (Skuse), and for psychodid larvae, and low electivity for larvae of T. rutilus and Orthopodomyia signifera (Coquillett), a predator-resistant mosquito larva. Diets were more similar between predator instars in tires than in treeholes, where invertebrate diversity was higher. An associated laboratory study was conducted to determine how long common prey could be detected in guts after ingestion. When alternative prey were provided immediately after consumption, oligochaetes, copepods, and psychodid larvae and adults were detected in >50% of dissected T. rutilus for 8-18 h after ingestion. By contrast, if T. rutilus fourth instars were starved after ingesting test prey, identifiable remains of psychodid larvae were detectable for >30 d in most predator larvae. Thus, the assessment of T. rutilus diet by identification of midgut remains is highly dependent on the consumption of subsequent prey.
Fil: Campos, Raul Ernesto. University of Florida; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Limnología ; Argentina
Fil: Lounibos, L. P.. University of Florida; Estados Unidos
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:11336/33910

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spelling Natural Prey and Digestion Times of Toxorhynchites rutilus (Diptera: Culicidae) in Southern FloridaCampos, Raul ErnestoLounibos, L. P.https://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Natural prey of Toxorhynchites rutilus (Coquillett) were identified from gut contents of 941 larvae collected from treeholes and tires located in an oak-palm woodland in south Florida. Twenty taxa of aquatic prey were recognized in midgut remains, in addition to eggs of Diptera from three families. Ostracods and chironomids were the most abundant aquatic prey in predators from tires, and rotifers and copepods from treeholes. Mosquito larvae accounted for only 6% of prey items from treeholes and 5% from tires. Remains of terrestrial arthropods of nine insect orders plus mites and spiders were also identified, these prey having been captured from the water surface by T. rutilus larvae. An electivity coefficient, R, was calculated for dipterous prey of each predator instar. Significant heterogeneities among R values in tires were attributable, in part, to high electivity for certain mosquito species, especially Aedes albopictus (Skuse), and for psychodid larvae, and low electivity for larvae of T. rutilus and Orthopodomyia signifera (Coquillett), a predator-resistant mosquito larva. Diets were more similar between predator instars in tires than in treeholes, where invertebrate diversity was higher. An associated laboratory study was conducted to determine how long common prey could be detected in guts after ingestion. When alternative prey were provided immediately after consumption, oligochaetes, copepods, and psychodid larvae and adults were detected in >50% of dissected T. rutilus for 8-18 h after ingestion. By contrast, if T. rutilus fourth instars were starved after ingesting test prey, identifiable remains of psychodid larvae were detectable for >30 d in most predator larvae. Thus, the assessment of T. rutilus diet by identification of midgut remains is highly dependent on the consumption of subsequent prey.Fil: Campos, Raul Ernesto. University of Florida; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Limnología ; ArgentinaFil: Lounibos, L. P.. University of Florida; Estados UnidosOxford University Press2000-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/33910Campos, Raul Ernesto; Lounibos, L. P.; Natural Prey and Digestion Times of Toxorhynchites rutilus (Diptera: Culicidae) in Southern Florida; Oxford University Press; Annals of the Entomologycal Society of America; 93; 6; 11-2000; 1280-12870013-8746CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/aesa/article-abstract/93/6/1280/161465?redirectedFrom=fulltextinfo:eu-repo/semantics/altIdentifier/doi/10.1603/0013-8746(2000)093[1280:NPADTO]2.0.CO;2info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:11:05Zoai:ri.conicet.gov.ar:11336/33910instacron: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:34982025-09-29 10:11:05.928CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Natural Prey and Digestion Times of Toxorhynchites rutilus (Diptera: Culicidae) in Southern Florida
title Natural Prey and Digestion Times of Toxorhynchites rutilus (Diptera: Culicidae) in Southern Florida
spellingShingle Natural Prey and Digestion Times of Toxorhynchites rutilus (Diptera: Culicidae) in Southern Florida
Campos, Raul Ernesto
title_short Natural Prey and Digestion Times of Toxorhynchites rutilus (Diptera: Culicidae) in Southern Florida
title_full Natural Prey and Digestion Times of Toxorhynchites rutilus (Diptera: Culicidae) in Southern Florida
title_fullStr Natural Prey and Digestion Times of Toxorhynchites rutilus (Diptera: Culicidae) in Southern Florida
title_full_unstemmed Natural Prey and Digestion Times of Toxorhynchites rutilus (Diptera: Culicidae) in Southern Florida
title_sort Natural Prey and Digestion Times of Toxorhynchites rutilus (Diptera: Culicidae) in Southern Florida
dc.creator.none.fl_str_mv Campos, Raul Ernesto
Lounibos, L. P.
author Campos, Raul Ernesto
author_facet Campos, Raul Ernesto
Lounibos, L. P.
author_role author
author2 Lounibos, L. P.
author2_role author
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Natural prey of Toxorhynchites rutilus (Coquillett) were identified from gut contents of 941 larvae collected from treeholes and tires located in an oak-palm woodland in south Florida. Twenty taxa of aquatic prey were recognized in midgut remains, in addition to eggs of Diptera from three families. Ostracods and chironomids were the most abundant aquatic prey in predators from tires, and rotifers and copepods from treeholes. Mosquito larvae accounted for only 6% of prey items from treeholes and 5% from tires. Remains of terrestrial arthropods of nine insect orders plus mites and spiders were also identified, these prey having been captured from the water surface by T. rutilus larvae. An electivity coefficient, R, was calculated for dipterous prey of each predator instar. Significant heterogeneities among R values in tires were attributable, in part, to high electivity for certain mosquito species, especially Aedes albopictus (Skuse), and for psychodid larvae, and low electivity for larvae of T. rutilus and Orthopodomyia signifera (Coquillett), a predator-resistant mosquito larva. Diets were more similar between predator instars in tires than in treeholes, where invertebrate diversity was higher. An associated laboratory study was conducted to determine how long common prey could be detected in guts after ingestion. When alternative prey were provided immediately after consumption, oligochaetes, copepods, and psychodid larvae and adults were detected in >50% of dissected T. rutilus for 8-18 h after ingestion. By contrast, if T. rutilus fourth instars were starved after ingesting test prey, identifiable remains of psychodid larvae were detectable for >30 d in most predator larvae. Thus, the assessment of T. rutilus diet by identification of midgut remains is highly dependent on the consumption of subsequent prey.
Fil: Campos, Raul Ernesto. University of Florida; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Limnología ; Argentina
Fil: Lounibos, L. P.. University of Florida; Estados Unidos
description Natural prey of Toxorhynchites rutilus (Coquillett) were identified from gut contents of 941 larvae collected from treeholes and tires located in an oak-palm woodland in south Florida. Twenty taxa of aquatic prey were recognized in midgut remains, in addition to eggs of Diptera from three families. Ostracods and chironomids were the most abundant aquatic prey in predators from tires, and rotifers and copepods from treeholes. Mosquito larvae accounted for only 6% of prey items from treeholes and 5% from tires. Remains of terrestrial arthropods of nine insect orders plus mites and spiders were also identified, these prey having been captured from the water surface by T. rutilus larvae. An electivity coefficient, R, was calculated for dipterous prey of each predator instar. Significant heterogeneities among R values in tires were attributable, in part, to high electivity for certain mosquito species, especially Aedes albopictus (Skuse), and for psychodid larvae, and low electivity for larvae of T. rutilus and Orthopodomyia signifera (Coquillett), a predator-resistant mosquito larva. Diets were more similar between predator instars in tires than in treeholes, where invertebrate diversity was higher. An associated laboratory study was conducted to determine how long common prey could be detected in guts after ingestion. When alternative prey were provided immediately after consumption, oligochaetes, copepods, and psychodid larvae and adults were detected in >50% of dissected T. rutilus for 8-18 h after ingestion. By contrast, if T. rutilus fourth instars were starved after ingesting test prey, identifiable remains of psychodid larvae were detectable for >30 d in most predator larvae. Thus, the assessment of T. rutilus diet by identification of midgut remains is highly dependent on the consumption of subsequent prey.
publishDate 2000
dc.date.none.fl_str_mv 2000-11
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/33910
Campos, Raul Ernesto; Lounibos, L. P.; Natural Prey and Digestion Times of Toxorhynchites rutilus (Diptera: Culicidae) in Southern Florida; Oxford University Press; Annals of the Entomologycal Society of America; 93; 6; 11-2000; 1280-1287
0013-8746
CONICET Digital
CONICET
url http://hdl.handle.net/11336/33910
identifier_str_mv Campos, Raul Ernesto; Lounibos, L. P.; Natural Prey and Digestion Times of Toxorhynchites rutilus (Diptera: Culicidae) in Southern Florida; Oxford University Press; Annals of the Entomologycal Society of America; 93; 6; 11-2000; 1280-1287
0013-8746
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
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info:eu-repo/semantics/altIdentifier/doi/10.1603/0013-8746(2000)093[1280:NPADTO]2.0.CO;2
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
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dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
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