Population dynamics of a freshwater amphipod from South America (Crustacea, Amphipoda, Hyalellidae)
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Nauplius |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-64972016000100222 |
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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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 |
format |
article |
status_str |
publishedVersion |
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) |
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_ |
1752126582208593920 |