Diel variation of larval fish abundance in the Amazon and Rio Negro

Araújo-Lima, Carlos Alberto Rego Monteiro; Silva, V. V. da; Petry, Paulo; Oliveira, Eurides de; Moura, S. M.L.

Artigo

Diel variation of larval fish abundance in the Amazon and Rio Negro

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 p...

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Autor principal:	Araújo-Lima, Carlos Alberto Rego Monteiro
Outros Autores:	Silva, V. V. da, Petry, Paulo, Oliveira, Eurides de, Moura, S. M.L.
Grau:	Artigo
Idioma:	English
Publicado em:	Revista Brasileira de Biologia 2020
Assuntos:	Fresh Water Animals Brasil Circadian Rhythm Fish Larva Physiology Population Density Animal Brasil Circadian Rhythm Fishes Fresh Water Larva Population Density
Acesso em linha:	https://repositorio.inpa.gov.br/handle/1/14841

id	oai:repositorio:1-14841
recordtype	dspace
spelling	oai:repositorio:1-14841 Diel variation of larval fish abundance in the Amazon and Rio Negro Araújo-Lima, Carlos Alberto Rego Monteiro Silva, V. V. da Petry, Paulo Oliveira, Eurides de Moura, S. M.L. Fresh Water Animals Brasil Circadian Rhythm Fish Larva Physiology Population Density Animal Brasil Circadian Rhythm Fishes Fresh Water Larva Population Density 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. 2020-04-24T17:09:59Z 2020-04-24T17:09:59Z 2001 Artigo https://repositorio.inpa.gov.br/handle/1/14841 10.1590/S1519-69842001000300003 en Volume 61, Número 3, Pags. 357-362 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Revista Brasileira de Biologia
institution	Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection	INPA-RI
language	English
topic	Fresh Water Animals Brasil Circadian Rhythm Fish Larva Physiology Population Density Animal Brasil Circadian Rhythm Fishes Fresh Water Larva Population Density
spellingShingle	Fresh Water Animals Brasil Circadian Rhythm Fish Larva Physiology Population Density Animal Brasil Circadian Rhythm Fishes Fresh Water Larva Population Density Araújo-Lima, Carlos Alberto Rego Monteiro Diel variation of larval fish abundance in the Amazon and Rio Negro
topic_facet	Fresh Water Animals Brasil Circadian Rhythm Fish Larva Physiology Population Density Animal Brasil Circadian Rhythm Fishes Fresh Water Larva Population Density
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.
format	Artigo
author	Araújo-Lima, Carlos Alberto Rego Monteiro
author2	Silva, V. V. da Petry, Paulo Oliveira, Eurides de Moura, S. M.L.
author2Str	Silva, V. V. da Petry, Paulo Oliveira, Eurides de Moura, S. M.L.
title	Diel variation of larval fish abundance in the Amazon and Rio Negro
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
publisher	Revista Brasileira de Biologia
publishDate	2020
url	https://repositorio.inpa.gov.br/handle/1/14841
_version_	1787142081440907264
score	11.755432

Diel variation of larval fish abundance in the Amazon and Rio Negro

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