Diel variation of larval fish abundance in the Amazon and Rio Negro
Autor(a) principal: | |
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Data de Publicação: | 2001 |
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=S1519-69842001000300003 |
Resumo: | Many streams and large rivers present higher ichthyoplankton densities at night. However, in some rivers this does not occur and larvae are equally abundant during the day. Larval drift diel variation is an important information for planning sampling programs for evaluating larval distribution and production. The aim of this study was to test whether the abundance of larval fish was different at either period. We tested it by comparing day and night densities of characiform, clupeiform and siluriform larvae during five years in the Amazon and one year in Rio Negro. We found that larvae of three species of characiform and larvae of siluriform were equally abundant during day and night in the Amazon. Conversely, the catch of Pellona spp. larvae was significantly higher during the day. In Rio Negro, however, larval abundance was higher during the night. These results imply that day samplings estimate adequately the abundance of these characiform and siluriform larvae in the Amazon, but not Pellona larvae. Evaluations of larved densities of Rio Negro will have to consider night sampling. |
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Brazilian Journal of Biology |
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Diel variation of larval fish abundance in the Amazon and Rio NegroAmazonfishlarvaeriverdiel distributionMany streams and large rivers present higher ichthyoplankton densities at night. However, in some rivers this does not occur and larvae are equally abundant during the day. Larval drift diel variation is an important information for planning sampling programs for evaluating larval distribution and production. The aim of this study was to test whether the abundance of larval fish was different at either period. We tested it by comparing day and night densities of characiform, clupeiform and siluriform larvae during five years in the Amazon and one year in Rio Negro. We found that larvae of three species of characiform and larvae of siluriform were equally abundant during day and night in the Amazon. Conversely, the catch of Pellona spp. larvae was significantly higher during the day. In Rio Negro, however, larval abundance was higher during the night. These results imply that day samplings estimate adequately the abundance of these characiform and siluriform larvae in the Amazon, but not Pellona larvae. Evaluations of larved densities of Rio Negro will have to consider night sampling.Instituto Internacional de Ecologia2001-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842001000300003Brazilian Journal of Biology v.61 n.3 2001reponame:Brazilian Journal of Biologyinstname:Instituto Internacional de Ecologia (IIE)instacron:IIE10.1590/S1519-69842001000300003info:eu-repo/semantics/openAccessARAUJO-LIMA,C. A. R. M.SILVA,V. V. daPETRY,P.OLIVEIRA,E. C.MOURA,S. M. L.eng2002-01-28T00:00:00Zoai:scielo:S1519-69842001000300003Revistahttps://www.scielo.br/j/bjb/https://old.scielo.br/oai/scielo-oai.phpbjb@bjb.com.br||bjb@bjb.com.br1678-43751519-6984opendoar:2002-01-28T00:00Brazilian Journal of Biology - Instituto Internacional de Ecologia (IIE)false |
dc.title.none.fl_str_mv |
Diel variation of larval fish abundance in the Amazon and Rio Negro |
title |
Diel variation of larval fish abundance in the Amazon and Rio Negro |
spellingShingle |
Diel variation of larval fish abundance in the Amazon and Rio Negro ARAUJO-LIMA,C. A. R. M. Amazon fish larvae river diel distribution |
title_short |
Diel variation of larval fish abundance in the Amazon and Rio Negro |
title_full |
Diel variation of larval fish abundance in the Amazon and Rio Negro |
title_fullStr |
Diel variation of larval fish abundance in the Amazon and Rio Negro |
title_full_unstemmed |
Diel variation of larval fish abundance in the Amazon and Rio Negro |
title_sort |
Diel variation of larval fish abundance in the Amazon and Rio Negro |
author |
ARAUJO-LIMA,C. A. R. M. |
author_facet |
ARAUJO-LIMA,C. A. R. M. SILVA,V. V. da PETRY,P. OLIVEIRA,E. C. MOURA,S. M. L. |
author_role |
author |
author2 |
SILVA,V. V. da PETRY,P. OLIVEIRA,E. C. MOURA,S. M. L. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
ARAUJO-LIMA,C. A. R. M. SILVA,V. V. da PETRY,P. OLIVEIRA,E. C. MOURA,S. M. L. |
dc.subject.por.fl_str_mv |
Amazon fish larvae river diel distribution |
topic |
Amazon fish larvae river diel distribution |
description |
Many streams and large rivers present higher ichthyoplankton densities at night. However, in some rivers this does not occur and larvae are equally abundant during the day. Larval drift diel variation is an important information for planning sampling programs for evaluating larval distribution and production. The aim of this study was to test whether the abundance of larval fish was different at either period. We tested it by comparing day and night densities of characiform, clupeiform and siluriform larvae during five years in the Amazon and one year in Rio Negro. We found that larvae of three species of characiform and larvae of siluriform were equally abundant during day and night in the Amazon. Conversely, the catch of Pellona spp. larvae was significantly higher during the day. In Rio Negro, however, larval abundance was higher during the night. These results imply that day samplings estimate adequately the abundance of these characiform and siluriform larvae in the Amazon, but not Pellona larvae. Evaluations of larved densities of Rio Negro will have to consider night sampling. |
publishDate |
2001 |
dc.date.none.fl_str_mv |
2001-08-01 |
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=S1519-69842001000300003 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842001000300003 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1519-69842001000300003 |
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.61 n.3 2001 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_ |
1752129874270617600 |