Diurnal variation in transect counts of birds in a cerrado landscape in the state of São Paulo, Brazil

Detalhes bibliográficos
Autor(a) principal: Cavarzere, Vagner
Data de Publicação: 2010
Outros Autores: Moraes, Gabriel Parmezani [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://www.ararajuba.org.br/sbo/ararajuba/artigos/Volume182/RBO182art3.pdf
http://hdl.handle.net/11449/8262
Resumo: The general statement that birds are recorded more often on morning than on afternoon counts is quite common and widespread among ornithologists. Although many investigators have reported temporal variations in bird detections using Point Counts in temperate regions, few researches regarding the same objectives have been conducted in Neotropical habitats or used transect counts as field method. We used transect counts to test the hypothesis that birds are evenly recorded between times of day in a predominantly open Cerrado landscape in southeastern Brazil. Although not always significantly, the number of species and individuals were consistently greater during the morning counts, which corroborates the fact that birds can be more detectable during this time of day. However, a few families as well as a small percentage of species were more likely to be recorded during either one of the two periods we analyzed. Our results suggest that morning counts should detect higher number of both species and individuals in our study area, but specific taxa show distinct patterns of detection which should be acknowledged prior to sampling.
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spelling Diurnal variation in transect counts of birds in a cerrado landscape in the state of São Paulo, BrazilAbundanceNeotropical regionpatterns of detectionrichnesstime of dayvisual detectionThe general statement that birds are recorded more often on morning than on afternoon counts is quite common and widespread among ornithologists. Although many investigators have reported temporal variations in bird detections using Point Counts in temperate regions, few researches regarding the same objectives have been conducted in Neotropical habitats or used transect counts as field method. We used transect counts to test the hypothesis that birds are evenly recorded between times of day in a predominantly open Cerrado landscape in southeastern Brazil. Although not always significantly, the number of species and individuals were consistently greater during the morning counts, which corroborates the fact that birds can be more detectable during this time of day. However, a few families as well as a small percentage of species were more likely to be recorded during either one of the two periods we analyzed. Our results suggest that morning counts should detect higher number of both species and individuals in our study area, but specific taxa show distinct patterns of detection which should be acknowledged prior to sampling.Univ São Paulo, Dept Zool, BR-05508900 São Paulo, BrazilUniv Estadual Paulista, Dept Ciencias Biol, BR-17033360 Bauru, SP, BrazilUniv Estadual Paulista, Dept Ciencias Biol, BR-17033360 Bauru, SP, BrazilSoc Brasileira OrnitologiaUniversidade de São Paulo (USP)Universidade Estadual Paulista (Unesp)Cavarzere, VagnerMoraes, Gabriel Parmezani [UNESP]2014-05-20T13:25:55Z2014-05-20T13:25:55Z2010-06-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article97-101application/pdfhttp://www.ararajuba.org.br/sbo/ararajuba/artigos/Volume182/RBO182art3.pdfRevista Brasileira de Ornitologia. Vicosa: Soc Brasileira Ornitologia, v. 18, n. 2, p. 97-101, 2010.0103-5657http://hdl.handle.net/11449/8262WOS:000208354200003WOS000208354200003.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengRevista Brasileira de Ornitologia0.5650,329info:eu-repo/semantics/openAccess2024-04-23T15:23:16Zoai:repositorio.unesp.br:11449/8262Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:35:18.394093Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Diurnal variation in transect counts of birds in a cerrado landscape in the state of São Paulo, Brazil
title Diurnal variation in transect counts of birds in a cerrado landscape in the state of São Paulo, Brazil
spellingShingle Diurnal variation in transect counts of birds in a cerrado landscape in the state of São Paulo, Brazil
Cavarzere, Vagner
Abundance
Neotropical region
patterns of detection
richness
time of day
visual detection
title_short Diurnal variation in transect counts of birds in a cerrado landscape in the state of São Paulo, Brazil
title_full Diurnal variation in transect counts of birds in a cerrado landscape in the state of São Paulo, Brazil
title_fullStr Diurnal variation in transect counts of birds in a cerrado landscape in the state of São Paulo, Brazil
title_full_unstemmed Diurnal variation in transect counts of birds in a cerrado landscape in the state of São Paulo, Brazil
title_sort Diurnal variation in transect counts of birds in a cerrado landscape in the state of São Paulo, Brazil
author Cavarzere, Vagner
author_facet Cavarzere, Vagner
Moraes, Gabriel Parmezani [UNESP]
author_role author
author2 Moraes, Gabriel Parmezani [UNESP]
author2_role author
dc.contributor.none.fl_str_mv Universidade de São Paulo (USP)
Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Cavarzere, Vagner
Moraes, Gabriel Parmezani [UNESP]
dc.subject.por.fl_str_mv Abundance
Neotropical region
patterns of detection
richness
time of day
visual detection
topic Abundance
Neotropical region
patterns of detection
richness
time of day
visual detection
description The general statement that birds are recorded more often on morning than on afternoon counts is quite common and widespread among ornithologists. Although many investigators have reported temporal variations in bird detections using Point Counts in temperate regions, few researches regarding the same objectives have been conducted in Neotropical habitats or used transect counts as field method. We used transect counts to test the hypothesis that birds are evenly recorded between times of day in a predominantly open Cerrado landscape in southeastern Brazil. Although not always significantly, the number of species and individuals were consistently greater during the morning counts, which corroborates the fact that birds can be more detectable during this time of day. However, a few families as well as a small percentage of species were more likely to be recorded during either one of the two periods we analyzed. Our results suggest that morning counts should detect higher number of both species and individuals in our study area, but specific taxa show distinct patterns of detection which should be acknowledged prior to sampling.
publishDate 2010
dc.date.none.fl_str_mv 2010-06-01
2014-05-20T13:25:55Z
2014-05-20T13:25:55Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.ararajuba.org.br/sbo/ararajuba/artigos/Volume182/RBO182art3.pdf
Revista Brasileira de Ornitologia. Vicosa: Soc Brasileira Ornitologia, v. 18, n. 2, p. 97-101, 2010.
0103-5657
http://hdl.handle.net/11449/8262
WOS:000208354200003
WOS000208354200003.pdf
url http://www.ararajuba.org.br/sbo/ararajuba/artigos/Volume182/RBO182art3.pdf
http://hdl.handle.net/11449/8262
identifier_str_mv Revista Brasileira de Ornitologia. Vicosa: Soc Brasileira Ornitologia, v. 18, n. 2, p. 97-101, 2010.
0103-5657
WOS:000208354200003
WOS000208354200003.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Revista Brasileira de Ornitologia
0.565
0,329
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 97-101
application/pdf
dc.publisher.none.fl_str_mv Soc Brasileira Ornitologia
publisher.none.fl_str_mv Soc Brasileira Ornitologia
dc.source.none.fl_str_mv Web of Science
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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