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Data de Publicação: | 2004 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Biotemas (Online) |
Texto Completo: | https://periodicos.ufsc.br/index.php/biotemas/article/view/23277 |
Resumo: | The resident population of estuarine dolphins (Sota/ia guianensis) in the North Bay, Santa Catarina Island, southern Brazil, was studied from September 2001 until July 2003 through periodical boat surveys. Using focal-group and sequential sampling, information such as geographical position and behavioral patterns were registered at 5-minute intervals. All the information collected was inserted in a GIS database of the study area. Since patterns of seasonal variation concerning home range and behavior had been established in previous works, we aimed at evaluating the existence of seasonal intensity of movements, therefore strengthening the proposed hypothesis of higher spatial requirements when food resources are low. The daily mean speed of the dolphin's group was used as an index of the intensity of movements, and its seasonal variation throughout the study period was analyzed. We found a statistically significant seasonal variation in the intensity of movement. The dolphins tended to move more in the cold seasons, in contrast with the hot seasons, when the dolphins tended to move less. Thus, previous studies are corroborated, supporting the hypothesis of higher spatialrequirements when there are fewer food resources. |
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.Variação sazonal na intensidade dos deslocamentos do boto-cinza, Sotalia guianensis (Cetacea: Delphinidae), na Baia Norte da Ilha de Santa CatarinaThe resident population of estuarine dolphins (Sota/ia guianensis) in the North Bay, Santa Catarina Island, southern Brazil, was studied from September 2001 until July 2003 through periodical boat surveys. Using focal-group and sequential sampling, information such as geographical position and behavioral patterns were registered at 5-minute intervals. All the information collected was inserted in a GIS database of the study area. Since patterns of seasonal variation concerning home range and behavior had been established in previous works, we aimed at evaluating the existence of seasonal intensity of movements, therefore strengthening the proposed hypothesis of higher spatial requirements when food resources are low. The daily mean speed of the dolphin's group was used as an index of the intensity of movements, and its seasonal variation throughout the study period was analyzed. We found a statistically significant seasonal variation in the intensity of movement. The dolphins tended to move more in the cold seasons, in contrast with the hot seasons, when the dolphins tended to move less. Thus, previous studies are corroborated, supporting the hypothesis of higher spatialrequirements when there are fewer food resources. A população residente de botos-cinza (Sota/ia guianensis) da Baia Norte da Ilha de Santa Catarina foi estudada de setembro de 2001 até julho de 2003 através de saídas de campo periódicas a bordo de uma embarcação de 5 metros. Utilizando a metodologia de grupo focal e amostragem seqüencial com registros a cada 5 minutos, dados como posição geográfica e comportamento do grupo de botos foram coletados e inseridos num banco de dados georreferenciados da Area de estudo. Como padrões de variação sazonal de área de vida e comportamento foram identificados em abordagens anteriores, visou-se avaliar a existência de sazonalidade na intensidade de deslocamentos e assim fortalecer a hipótese proposta de maiores requerimentos espaciais em períodos de menor disponibilidade de recurso alimentar. Para isto, a velocidade média diária do grupo de botos-cinza foi utilizada como um índice de intensidade de deslocamento do grupo, e sua variação ao longo do período estudado foi analisada. Como resultado nota-se que a variação sazonal da intensidade de deslocamentos foi estatisticamente significante e as estações quentes tenderam a apresentar menor intensidade que as estações frias. Assim, os estudos anteriores são corroborados reforçandose a hipótese de maiores requerimentos espaciais quando há menor disponibilidade de presas.Universidade Federal de Santa Catarina2004-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsc.br/index.php/biotemas/article/view/23277Biotemas; v. 17 n. 1 (2004); 203-2162175-79250103-1643reponame:Biotemas (Online)instname:Universidade Federal de Santa Catarina (UFSC)instacron:UFSCporhttps://periodicos.ufsc.br/index.php/biotemas/article/view/23277/21009Copyright (c) 2004 Fábio Gonçalves Daura-Jorge, Leonardo Liberali Wedekin, Paulo César Simões-Lopeshttp://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessDaura-Jorge, Fábio GonçalvesWedekin, Leonardo LiberaliSimões-Lopes, Paulo César2022-11-21T11:16:18Zoai:periodicos.ufsc.br:article/23277Revistahttp://www.biotemas.ufsc.br/index.htmPUBhttps://periodicos.ufsc.br/index.php/biotemas/oai||carlospinto@ccb.ufsc.br2175-79250103-1643opendoar:2022-11-21T11:16:18Biotemas (Online) - Universidade Federal de Santa Catarina (UFSC)false |
dc.title.none.fl_str_mv |
. Variação sazonal na intensidade dos deslocamentos do boto-cinza, Sotalia guianensis (Cetacea: Delphinidae), na Baia Norte da Ilha de Santa Catarina |
title |
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spellingShingle |
. Daura-Jorge, Fábio Gonçalves |
title_short |
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title_full |
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title_fullStr |
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title_full_unstemmed |
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title_sort |
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author |
Daura-Jorge, Fábio Gonçalves |
author_facet |
Daura-Jorge, Fábio Gonçalves Wedekin, Leonardo Liberali Simões-Lopes, Paulo César |
author_role |
author |
author2 |
Wedekin, Leonardo Liberali Simões-Lopes, Paulo César |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Daura-Jorge, Fábio Gonçalves Wedekin, Leonardo Liberali Simões-Lopes, Paulo César |
description |
The resident population of estuarine dolphins (Sota/ia guianensis) in the North Bay, Santa Catarina Island, southern Brazil, was studied from September 2001 until July 2003 through periodical boat surveys. Using focal-group and sequential sampling, information such as geographical position and behavioral patterns were registered at 5-minute intervals. All the information collected was inserted in a GIS database of the study area. Since patterns of seasonal variation concerning home range and behavior had been established in previous works, we aimed at evaluating the existence of seasonal intensity of movements, therefore strengthening the proposed hypothesis of higher spatial requirements when food resources are low. The daily mean speed of the dolphin's group was used as an index of the intensity of movements, and its seasonal variation throughout the study period was analyzed. We found a statistically significant seasonal variation in the intensity of movement. The dolphins tended to move more in the cold seasons, in contrast with the hot seasons, when the dolphins tended to move less. Thus, previous studies are corroborated, supporting the hypothesis of higher spatialrequirements when there are fewer food resources. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.ufsc.br/index.php/biotemas/article/view/23277 |
url |
https://periodicos.ufsc.br/index.php/biotemas/article/view/23277 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.ufsc.br/index.php/biotemas/article/view/23277/21009 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2004 Fábio Gonçalves Daura-Jorge, Leonardo Liberali Wedekin, Paulo César Simões-Lopes http://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2004 Fábio Gonçalves Daura-Jorge, Leonardo Liberali Wedekin, Paulo César Simões-Lopes http://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Catarina |
publisher.none.fl_str_mv |
Universidade Federal de Santa Catarina |
dc.source.none.fl_str_mv |
Biotemas; v. 17 n. 1 (2004); 203-216 2175-7925 0103-1643 reponame:Biotemas (Online) instname:Universidade Federal de Santa Catarina (UFSC) instacron:UFSC |
instname_str |
Universidade Federal de Santa Catarina (UFSC) |
instacron_str |
UFSC |
institution |
UFSC |
reponame_str |
Biotemas (Online) |
collection |
Biotemas (Online) |
repository.name.fl_str_mv |
Biotemas (Online) - Universidade Federal de Santa Catarina (UFSC) |
repository.mail.fl_str_mv |
||carlospinto@ccb.ufsc.br |
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1799940552526921728 |