Diel vertical migration of copepods in a Brazilian lake: a mechanism for decreasing risk of Chaoborus predation?
Autor(a) principal: | |
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Data de Publicação: | 2004 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Journal of Biology |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842004000200015 |
Resumo: | A comparison between two studies on diel vertical migration of two cyclopoid copepod species, in Lake Monte Alegre, undertaken in 1985/86 and 1999, revealed a change in their migratory behavior. In summer, during a period of marked stratification with low dissolved oxygen near the bottom, the organisms avoided the deepest layers, and migration was nocturnal or undetectable, in both periods. On other occasions, with partial or total circulation in the lake, a weak twilight migration of copepodites and adults in 1985 was replaced by the reverse in 1999. Differences were found among stages, with the weakest or undetectable migration being observed for nauplii. The migratory pattern change for copepodites and adults might be related with a recent predation pressure increase by Chaoborus larvae on copepods, after the virtual disappearance of their main cladoceran prey. |
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Brazilian Journal of Biology |
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Diel vertical migration of copepods in a Brazilian lake: a mechanism for decreasing risk of Chaoborus predation?reverse migrationcyclopoid copepodsChaoborus predationA comparison between two studies on diel vertical migration of two cyclopoid copepod species, in Lake Monte Alegre, undertaken in 1985/86 and 1999, revealed a change in their migratory behavior. In summer, during a period of marked stratification with low dissolved oxygen near the bottom, the organisms avoided the deepest layers, and migration was nocturnal or undetectable, in both periods. On other occasions, with partial or total circulation in the lake, a weak twilight migration of copepodites and adults in 1985 was replaced by the reverse in 1999. Differences were found among stages, with the weakest or undetectable migration being observed for nauplii. The migratory pattern change for copepodites and adults might be related with a recent predation pressure increase by Chaoborus larvae on copepods, after the virtual disappearance of their main cladoceran prey.Instituto Internacional de Ecologia2004-05-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842004000200015Brazilian Journal of Biology v.64 n.2 2004reponame:Brazilian Journal of Biologyinstname:Instituto Internacional de Ecologia (IIE)instacron:IIE10.1590/S1519-69842004000200015info:eu-repo/semantics/openAccessA.,PerticarrariArcifa,M. S.Rodrigues,R. A.eng2004-08-20T00:00:00Zoai:scielo:S1519-69842004000200015Revistahttps://www.scielo.br/j/bjb/https://old.scielo.br/oai/scielo-oai.phpbjb@bjb.com.br||bjb@bjb.com.br1678-43751519-6984opendoar:2004-08-20T00:00Brazilian Journal of Biology - Instituto Internacional de Ecologia (IIE)false |
dc.title.none.fl_str_mv |
Diel vertical migration of copepods in a Brazilian lake: a mechanism for decreasing risk of Chaoborus predation? |
title |
Diel vertical migration of copepods in a Brazilian lake: a mechanism for decreasing risk of Chaoborus predation? |
spellingShingle |
Diel vertical migration of copepods in a Brazilian lake: a mechanism for decreasing risk of Chaoborus predation? A.,Perticarrari reverse migration cyclopoid copepods Chaoborus predation |
title_short |
Diel vertical migration of copepods in a Brazilian lake: a mechanism for decreasing risk of Chaoborus predation? |
title_full |
Diel vertical migration of copepods in a Brazilian lake: a mechanism for decreasing risk of Chaoborus predation? |
title_fullStr |
Diel vertical migration of copepods in a Brazilian lake: a mechanism for decreasing risk of Chaoborus predation? |
title_full_unstemmed |
Diel vertical migration of copepods in a Brazilian lake: a mechanism for decreasing risk of Chaoborus predation? |
title_sort |
Diel vertical migration of copepods in a Brazilian lake: a mechanism for decreasing risk of Chaoborus predation? |
author |
A.,Perticarrari |
author_facet |
A.,Perticarrari Arcifa,M. S. Rodrigues,R. A. |
author_role |
author |
author2 |
Arcifa,M. S. Rodrigues,R. A. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
A.,Perticarrari Arcifa,M. S. Rodrigues,R. A. |
dc.subject.por.fl_str_mv |
reverse migration cyclopoid copepods Chaoborus predation |
topic |
reverse migration cyclopoid copepods Chaoborus predation |
description |
A comparison between two studies on diel vertical migration of two cyclopoid copepod species, in Lake Monte Alegre, undertaken in 1985/86 and 1999, revealed a change in their migratory behavior. In summer, during a period of marked stratification with low dissolved oxygen near the bottom, the organisms avoided the deepest layers, and migration was nocturnal or undetectable, in both periods. On other occasions, with partial or total circulation in the lake, a weak twilight migration of copepodites and adults in 1985 was replaced by the reverse in 1999. Differences were found among stages, with the weakest or undetectable migration being observed for nauplii. The migratory pattern change for copepodites and adults might be related with a recent predation pressure increase by Chaoborus larvae on copepods, after the virtual disappearance of their main cladoceran prey. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-05-01 |
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=S1519-69842004000200015 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842004000200015 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1519-69842004000200015 |
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 |
Instituto Internacional de Ecologia |
publisher.none.fl_str_mv |
Instituto Internacional de Ecologia |
dc.source.none.fl_str_mv |
Brazilian Journal of Biology v.64 n.2 2004 reponame:Brazilian Journal of Biology instname:Instituto Internacional de Ecologia (IIE) instacron:IIE |
instname_str |
Instituto Internacional de Ecologia (IIE) |
instacron_str |
IIE |
institution |
IIE |
reponame_str |
Brazilian Journal of Biology |
collection |
Brazilian Journal of Biology |
repository.name.fl_str_mv |
Brazilian Journal of Biology - Instituto Internacional de Ecologia (IIE) |
repository.mail.fl_str_mv |
bjb@bjb.com.br||bjb@bjb.com.br |
_version_ |
1752129875159810048 |