Population structure of two freshwater amphipods (Crustacea: Peracarida: Hyalellidae) from southern Brazil
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Nauplius |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-64972018000100221 |
Resumo: | Abstract Two recently described amphipods species from southern Brazil, Hyalella georginae Streck and Castiglioni, 2017 and Hyalella gauchensis Streck and Castiglioni, 2017, had their population structures characterized by sex, females’ ovigerous condition, cephalothorax length (mm), size-class frequency distribution, sex-ratio, reproductive period, and recruitment. The specimens were collected with a dip net from a stream source (H. georginae) and from a water reservoir (H. gauchensis) in the Palmeira das Missões municipality, state of Rio Grande do Sul, Brazil, from August 2012 to July 2013 (12 months). Both species showed a bimodal frequency distribution for total and seasonal size classes, with males larger than females. Overall, the sex ratio favored females when analyzed monthly and seasonally. Ovigerous females were recorded throughout the year, with higher frequency in spring (H. georginae) and summer (H. gauchensis), characterizing a seasonal reproduction. Both species showed continuous recruitment, with greater intensity in the spring. The population structure of these two Hyalella species had similar features, showing continuous recruitment and seasonal reproduction related to their life-history strategies, which promote adaptations to their habitat. |
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Population structure of two freshwater amphipods (Crustacea: Peracarida: Hyalellidae) from southern Brazilbody sizeHyalellarecruitmentreproductive periodsex ratioAbstract Two recently described amphipods species from southern Brazil, Hyalella georginae Streck and Castiglioni, 2017 and Hyalella gauchensis Streck and Castiglioni, 2017, had their population structures characterized by sex, females’ ovigerous condition, cephalothorax length (mm), size-class frequency distribution, sex-ratio, reproductive period, and recruitment. The specimens were collected with a dip net from a stream source (H. georginae) and from a water reservoir (H. gauchensis) in the Palmeira das Missões municipality, state of Rio Grande do Sul, Brazil, from August 2012 to July 2013 (12 months). Both species showed a bimodal frequency distribution for total and seasonal size classes, with males larger than females. Overall, the sex ratio favored females when analyzed monthly and seasonally. Ovigerous females were recorded throughout the year, with higher frequency in spring (H. georginae) and summer (H. gauchensis), characterizing a seasonal reproduction. Both species showed continuous recruitment, with greater intensity in the spring. The population structure of these two Hyalella species had similar features, showing continuous recruitment and seasonal reproduction related to their life-history strategies, which promote adaptations to their habitat.Sociedade Brasileira de Carcinologia2018-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-64972018000100221Nauplius v.26 2018reponame:Naupliusinstname:Sociedade Brasileira de Carcinologia (SBCA)instacron:SBCA10.1590/2358-2936e2018025info:eu-repo/semantics/openAccessOzga,Aline VasumCastro,Vanessa da Silva deCastiglioni,Daniela da Silvaeng2019-01-08T00:00:00Zoai:scielo:S0104-64972018000100221Revistahttp://www.scielo.br/scielo.php?script=sci_serial&pid=0104-6497&lng=en&nrm=isohttps://old.scielo.br/oai/scielo-oai.php||editor.nauplius@gmail.com2358-29360104-6497opendoar:2019-01-08T00:00Nauplius - Sociedade Brasileira de Carcinologia (SBCA)false |
dc.title.none.fl_str_mv |
Population structure of two freshwater amphipods (Crustacea: Peracarida: Hyalellidae) from southern Brazil |
title |
Population structure of two freshwater amphipods (Crustacea: Peracarida: Hyalellidae) from southern Brazil |
spellingShingle |
Population structure of two freshwater amphipods (Crustacea: Peracarida: Hyalellidae) from southern Brazil Ozga,Aline Vasum body size Hyalella recruitment reproductive period sex ratio |
title_short |
Population structure of two freshwater amphipods (Crustacea: Peracarida: Hyalellidae) from southern Brazil |
title_full |
Population structure of two freshwater amphipods (Crustacea: Peracarida: Hyalellidae) from southern Brazil |
title_fullStr |
Population structure of two freshwater amphipods (Crustacea: Peracarida: Hyalellidae) from southern Brazil |
title_full_unstemmed |
Population structure of two freshwater amphipods (Crustacea: Peracarida: Hyalellidae) from southern Brazil |
title_sort |
Population structure of two freshwater amphipods (Crustacea: Peracarida: Hyalellidae) from southern Brazil |
author |
Ozga,Aline Vasum |
author_facet |
Ozga,Aline Vasum Castro,Vanessa da Silva de Castiglioni,Daniela da Silva |
author_role |
author |
author2 |
Castro,Vanessa da Silva de Castiglioni,Daniela da Silva |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Ozga,Aline Vasum Castro,Vanessa da Silva de Castiglioni,Daniela da Silva |
dc.subject.por.fl_str_mv |
body size Hyalella recruitment reproductive period sex ratio |
topic |
body size Hyalella recruitment reproductive period sex ratio |
description |
Abstract Two recently described amphipods species from southern Brazil, Hyalella georginae Streck and Castiglioni, 2017 and Hyalella gauchensis Streck and Castiglioni, 2017, had their population structures characterized by sex, females’ ovigerous condition, cephalothorax length (mm), size-class frequency distribution, sex-ratio, reproductive period, and recruitment. The specimens were collected with a dip net from a stream source (H. georginae) and from a water reservoir (H. gauchensis) in the Palmeira das Missões municipality, state of Rio Grande do Sul, Brazil, from August 2012 to July 2013 (12 months). Both species showed a bimodal frequency distribution for total and seasonal size classes, with males larger than females. Overall, the sex ratio favored females when analyzed monthly and seasonally. Ovigerous females were recorded throughout the year, with higher frequency in spring (H. georginae) and summer (H. gauchensis), characterizing a seasonal reproduction. Both species showed continuous recruitment, with greater intensity in the spring. The population structure of these two Hyalella species had similar features, showing continuous recruitment and seasonal reproduction related to their life-history strategies, which promote adaptations to their habitat. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-01-01 |
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=S0104-64972018000100221 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-64972018000100221 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/2358-2936e2018025 |
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 Carcinologia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Carcinologia |
dc.source.none.fl_str_mv |
Nauplius v.26 2018 reponame:Nauplius instname:Sociedade Brasileira de Carcinologia (SBCA) instacron:SBCA |
instname_str |
Sociedade Brasileira de Carcinologia (SBCA) |
instacron_str |
SBCA |
institution |
SBCA |
reponame_str |
Nauplius |
collection |
Nauplius |
repository.name.fl_str_mv |
Nauplius - Sociedade Brasileira de Carcinologia (SBCA) |
repository.mail.fl_str_mv |
||editor.nauplius@gmail.com |
_version_ |
1752126582295625728 |