Population dynamics of a freshwater amphipod from South America (Crustacea, Amphipoda, Hyalellidae)

Detalhes bibliográficos
Autor(a) principal: Castiglioni,Daniela da Silva
Data de Publicação: 2016
Outros Autores: Ozga,Aline Vasum, Rodrigues,Stella Gomes, Bueno,Alessandra Angélica de Pádua
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Nauplius
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-64972016000100222
Resumo: Abstract This study aimed to characterize the population dynamics of Hyalella bonariensis Bond-Buckup, Araujo & Santos, 2008 from headwater spring in a rural area of state of Rio Grande do Sul, Brazil. Four samples were collected in August (winter) and October (spring) of 2012 and January (summer) and April (autumn) of 2013. Ovigerous females and precopula pairs were separated from other individual in the field. A total of 5,266 specimens were sampled, being 1,878 males, 2,073 females (including 240 ovigerous females) and 1,315 juveniles. The frequency distribution of size classes (measured as cephalothorax length, CL) was polymodal and bimodal in males and females, respectively. Males reach larger size than females. Sexual maturity of males and females was estimated at 0.40 and 0.38 mm for CL, respectively. Total sex ratio favored females, and these were more frequent in intermediate size classes, while males were more frequent in larger size classes. Ovigerous females and couples were found in four seasons, but both were more abundant in winter. Juveniles were also found in all seasons, being more frequent in winter and spring. These results showed that this H. bonariensis population has similar dynamics to other species of Hyalella Smith, 1874 from Brazil, but present variations when compared to other freshwater amphipods.
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spelling Population dynamics of a freshwater amphipod from South America (Crustacea, Amphipoda, Hyalellidae)Body sizeHyalellareproductive periodsex ratiosexual maturityAbstract This study aimed to characterize the population dynamics of Hyalella bonariensis Bond-Buckup, Araujo & Santos, 2008 from headwater spring in a rural area of state of Rio Grande do Sul, Brazil. Four samples were collected in August (winter) and October (spring) of 2012 and January (summer) and April (autumn) of 2013. Ovigerous females and precopula pairs were separated from other individual in the field. A total of 5,266 specimens were sampled, being 1,878 males, 2,073 females (including 240 ovigerous females) and 1,315 juveniles. The frequency distribution of size classes (measured as cephalothorax length, CL) was polymodal and bimodal in males and females, respectively. Males reach larger size than females. Sexual maturity of males and females was estimated at 0.40 and 0.38 mm for CL, respectively. Total sex ratio favored females, and these were more frequent in intermediate size classes, while males were more frequent in larger size classes. Ovigerous females and couples were found in four seasons, but both were more abundant in winter. Juveniles were also found in all seasons, being more frequent in winter and spring. These results showed that this H. bonariensis population has similar dynamics to other species of Hyalella Smith, 1874 from Brazil, but present variations when compared to other freshwater amphipods.Sociedade Brasileira de Carcinologia2016-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-64972016000100222Nauplius v.24 2016reponame:Naupliusinstname:Sociedade Brasileira de Carcinologia (SBCA)instacron:SBCA10.1590/2358-2936e2016028info:eu-repo/semantics/openAccessCastiglioni,Daniela da SilvaOzga,Aline VasumRodrigues,Stella GomesBueno,Alessandra Angélica de Páduaeng2016-12-15T00:00:00Zoai:scielo:S0104-64972016000100222Revistahttp://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:2016-12-15T00:00Nauplius - Sociedade Brasileira de Carcinologia (SBCA)false
dc.title.none.fl_str_mv Population dynamics of a freshwater amphipod from South America (Crustacea, Amphipoda, Hyalellidae)
title Population dynamics of a freshwater amphipod from South America (Crustacea, Amphipoda, Hyalellidae)
spellingShingle Population dynamics of a freshwater amphipod from South America (Crustacea, Amphipoda, Hyalellidae)
Castiglioni,Daniela da Silva
Body size
Hyalella
reproductive period
sex ratio
sexual maturity
title_short Population dynamics of a freshwater amphipod from South America (Crustacea, Amphipoda, Hyalellidae)
title_full Population dynamics of a freshwater amphipod from South America (Crustacea, Amphipoda, Hyalellidae)
title_fullStr Population dynamics of a freshwater amphipod from South America (Crustacea, Amphipoda, Hyalellidae)
title_full_unstemmed Population dynamics of a freshwater amphipod from South America (Crustacea, Amphipoda, Hyalellidae)
title_sort Population dynamics of a freshwater amphipod from South America (Crustacea, Amphipoda, Hyalellidae)
author Castiglioni,Daniela da Silva
author_facet Castiglioni,Daniela da Silva
Ozga,Aline Vasum
Rodrigues,Stella Gomes
Bueno,Alessandra Angélica de Pádua
author_role author
author2 Ozga,Aline Vasum
Rodrigues,Stella Gomes
Bueno,Alessandra Angélica de Pádua
author2_role author
author
author
dc.contributor.author.fl_str_mv Castiglioni,Daniela da Silva
Ozga,Aline Vasum
Rodrigues,Stella Gomes
Bueno,Alessandra Angélica de Pádua
dc.subject.por.fl_str_mv Body size
Hyalella
reproductive period
sex ratio
sexual maturity
topic Body size
Hyalella
reproductive period
sex ratio
sexual maturity
description Abstract This study aimed to characterize the population dynamics of Hyalella bonariensis Bond-Buckup, Araujo & Santos, 2008 from headwater spring in a rural area of state of Rio Grande do Sul, Brazil. Four samples were collected in August (winter) and October (spring) of 2012 and January (summer) and April (autumn) of 2013. Ovigerous females and precopula pairs were separated from other individual in the field. A total of 5,266 specimens were sampled, being 1,878 males, 2,073 females (including 240 ovigerous females) and 1,315 juveniles. The frequency distribution of size classes (measured as cephalothorax length, CL) was polymodal and bimodal in males and females, respectively. Males reach larger size than females. Sexual maturity of males and females was estimated at 0.40 and 0.38 mm for CL, respectively. Total sex ratio favored females, and these were more frequent in intermediate size classes, while males were more frequent in larger size classes. Ovigerous females and couples were found in four seasons, but both were more abundant in winter. Juveniles were also found in all seasons, being more frequent in winter and spring. These results showed that this H. bonariensis population has similar dynamics to other species of Hyalella Smith, 1874 from Brazil, but present variations when compared to other freshwater amphipods.
publishDate 2016
dc.date.none.fl_str_mv 2016-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-64972016000100222
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-64972016000100222
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/2358-2936e2016028
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.24 2016
reponame:Nauplius
instname:Sociedade Brasileira de Carcinologia (SBCA)
instacron:SBCA
instname_str Sociedade Brasileira de Carcinologia (SBCA)
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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
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