Determination of larval instars in Chironomus sancticaroli (Diptera: Chironomidae) using novel head capsule structures
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Zoologia (Curitiba. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000200011 |
Resumo: | Determining the age composition of a population is important when conducting ecological, taxonomic and environmental assessments. Morphometric measurements of the head capsule, especially the length and width, are widely used in the identification of insect instars, but alternative ways for determining the age of insects can expand the options for the analysis of field and laboratory populations. This study evaluated the morphometry of the antennae, mandibles, mentum and ventromental plates to discriminate among the four larval instars of Chironomus sancticaroli Strixino & Strixino, 1981. The larvae were reared in the laboratory under constant temperature (25°C) and photoperiod of 12/12 hours for 19 days, with a supply of food. Fifteen larvae were removed randomly every day, cleared in KOH, and slide-mounted, and had the antennae, mandibles, mentum and ventromental plates measured. The dimensions of the four structures studied allowed us to statistically distinguish each of the four larval instars. The data fit an exponential equation according to the Brooks-Dyar rule, which allows an estimate of the larval instar of specimens collected in the field, even when development takes place under different conditions. The duration of each instar was also obtained from our data, and showed an overlap of instars during development. |
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Determination of larval instars in Chironomus sancticaroli (Diptera: Chironomidae) using novel head capsule structuresGrowth ratehead capsuleinstarsmorphometryDetermining the age composition of a population is important when conducting ecological, taxonomic and environmental assessments. Morphometric measurements of the head capsule, especially the length and width, are widely used in the identification of insect instars, but alternative ways for determining the age of insects can expand the options for the analysis of field and laboratory populations. This study evaluated the morphometry of the antennae, mandibles, mentum and ventromental plates to discriminate among the four larval instars of Chironomus sancticaroli Strixino & Strixino, 1981. The larvae were reared in the laboratory under constant temperature (25°C) and photoperiod of 12/12 hours for 19 days, with a supply of food. Fifteen larvae were removed randomly every day, cleared in KOH, and slide-mounted, and had the antennae, mandibles, mentum and ventromental plates measured. The dimensions of the four structures studied allowed us to statistically distinguish each of the four larval instars. The data fit an exponential equation according to the Brooks-Dyar rule, which allows an estimate of the larval instar of specimens collected in the field, even when development takes place under different conditions. The duration of each instar was also obtained from our data, and showed an overlap of instars during development.Sociedade Brasileira de Zoologia2013-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000200011Zoologia (Curitiba) v.30 n.2 2013reponame:Zoologia (Curitiba. Online)instname:Sociedade Brasileira de Zoologiainstacron:SBZ10.1590/S1984-46702013000200011info:eu-repo/semantics/openAccessRichardi,Vinicius S.Rebechi,DéboraAranha,José M. R.Navarro-Silva,Mário A.eng2013-05-09T00:00:00Zoai:scielo:S1984-46702013000200011Revistahttp://www.scielo.br/zoolONGhttps://old.scielo.br/oai/scielo-oai.phpsbz@sbzoologia.org.br1984-46891984-4670opendoar:2013-05-09T00:00Zoologia (Curitiba. Online) - Sociedade Brasileira de Zoologiafalse |
dc.title.none.fl_str_mv |
Determination of larval instars in Chironomus sancticaroli (Diptera: Chironomidae) using novel head capsule structures |
title |
Determination of larval instars in Chironomus sancticaroli (Diptera: Chironomidae) using novel head capsule structures |
spellingShingle |
Determination of larval instars in Chironomus sancticaroli (Diptera: Chironomidae) using novel head capsule structures Richardi,Vinicius S. Growth rate head capsule instars morphometry |
title_short |
Determination of larval instars in Chironomus sancticaroli (Diptera: Chironomidae) using novel head capsule structures |
title_full |
Determination of larval instars in Chironomus sancticaroli (Diptera: Chironomidae) using novel head capsule structures |
title_fullStr |
Determination of larval instars in Chironomus sancticaroli (Diptera: Chironomidae) using novel head capsule structures |
title_full_unstemmed |
Determination of larval instars in Chironomus sancticaroli (Diptera: Chironomidae) using novel head capsule structures |
title_sort |
Determination of larval instars in Chironomus sancticaroli (Diptera: Chironomidae) using novel head capsule structures |
author |
Richardi,Vinicius S. |
author_facet |
Richardi,Vinicius S. Rebechi,Débora Aranha,José M. R. Navarro-Silva,Mário A. |
author_role |
author |
author2 |
Rebechi,Débora Aranha,José M. R. Navarro-Silva,Mário A. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Richardi,Vinicius S. Rebechi,Débora Aranha,José M. R. Navarro-Silva,Mário A. |
dc.subject.por.fl_str_mv |
Growth rate head capsule instars morphometry |
topic |
Growth rate head capsule instars morphometry |
description |
Determining the age composition of a population is important when conducting ecological, taxonomic and environmental assessments. Morphometric measurements of the head capsule, especially the length and width, are widely used in the identification of insect instars, but alternative ways for determining the age of insects can expand the options for the analysis of field and laboratory populations. This study evaluated the morphometry of the antennae, mandibles, mentum and ventromental plates to discriminate among the four larval instars of Chironomus sancticaroli Strixino & Strixino, 1981. The larvae were reared in the laboratory under constant temperature (25°C) and photoperiod of 12/12 hours for 19 days, with a supply of food. Fifteen larvae were removed randomly every day, cleared in KOH, and slide-mounted, and had the antennae, mandibles, mentum and ventromental plates measured. The dimensions of the four structures studied allowed us to statistically distinguish each of the four larval instars. The data fit an exponential equation according to the Brooks-Dyar rule, which allows an estimate of the larval instar of specimens collected in the field, even when development takes place under different conditions. The duration of each instar was also obtained from our data, and showed an overlap of instars during development. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-04-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000200011 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000200011 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1984-46702013000200011 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Zoologia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Zoologia |
dc.source.none.fl_str_mv |
Zoologia (Curitiba) v.30 n.2 2013 reponame:Zoologia (Curitiba. Online) instname:Sociedade Brasileira de Zoologia instacron:SBZ |
instname_str |
Sociedade Brasileira de Zoologia |
instacron_str |
SBZ |
institution |
SBZ |
reponame_str |
Zoologia (Curitiba. Online) |
collection |
Zoologia (Curitiba. Online) |
repository.name.fl_str_mv |
Zoologia (Curitiba. Online) - Sociedade Brasileira de Zoologia |
repository.mail.fl_str_mv |
sbz@sbzoologia.org.br |
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1750318091238113280 |