Caracter?sticas do comportamento alimentar coordenado do boto-cinza Sotalia guianensis (Van B?neden, 1864) (Cetacea: Delphinidae) nas Ba?a de Sepetiba e Ba?a de Ilha Grande - RJ

Detalhes bibliográficos
Autor(a) principal: Oliveira, Elaine Cardoso da Silva
Data de Publicação: 2012
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Biblioteca Digital de Teses e Dissertações da UFRRJ
Texto Completo: https://tede.ufrrj.br/jspui/handle/jspui/3546
Resumo: The present study characterized the coordinated feeding behavior of two populations of estuarine dolphin Sotalia guianensis in southeastern of Brazil. In both bays were investigated coordinated feeding bouts, frequency of mean coordinated feeding tactics (Wall formation, Line Abreast, ?Kettle? and Perpendicular feeding), presence of jumps, group size engaged in each tactic, seasonality and presence of calves and juveniles during the coordinated feeding behavior. In Chapter 1 the coordinated feeding behavior of the Sepetiba Bay population was analyzed based on 29 boat trips of which 18 occurred in spring-summer period and 11 occurred in autumn-winter period from September 2000 to August 2001. In Chapter 2 a data comparison between Sepetiba Bay (Chapter 1) and Ilha Grande Bay populations (collected from May 2007 to March 2008) was made. Were observed 370 mean feeding tactics in Sepetiba Bay and 914 in Ilha Grande Bay. In a total, were quantified 239 feeding bouts with mean duration of 66,65s in Sepetiba Bay and 399 ?bouts? in Ilha Grande Bay with duration of 60 s ? 114 s. Statisticals differences of feeding bouts were encountered between the autumns-winter periods for the two bays with Sepetiba Bay presenting longer feeding bouts and higher frequency of tactics in the autumn-winter period than spring-summer period, and the opposite result for Ilha Grande Bay. In both bays, Wall formation was the feeding tactic more used by dolphins and with bigger group size, suggesting that this tactic has a better cost benefit relation for these two populations. The presence of jumps was observed, being more frequently seen in Ilha Grande Bay. In Sepetiba Bay, group size was significantly different between all feeding tactics, but showed no statistically difference for each tactic separately along the seasons. Among the two bays Mood?s Median test only showed significant difference in group size for the feeding tactics Wall formation and Line Abreast. Kruskal Wallis test was significantly different in group size for all feeding tactics along the seasons in the two bays. These differences in group size seems to be related with the chosen prey and the energy intakes of each tactic for each participant of the group. In Sepetiba Bay, calves and juveniles were observed in 227 groups (61.35%) whereas in llha Grande Bay these animals were present in 905 feeding tactics, being the frequency of feeding tactics with presence/ausence of these animals between the two bays statistically different. So, this estuarine complex is an ideal region for breeding and social learning of the several feeding tactics by the calves and juveniles. These regions can be considerate as important areas for this species conservation, requiring more management and preservation efforts.
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spelling Sim?o, Sheila Marino695.108.147-68http://lattes.cnpq.br/1704946542749907Lodi, Liliane FerreiraFerreira, Ildemar116.221.227-63http://lattes.cnpq.br/8338137670918246Oliveira, Elaine Cardoso da Silva2020-05-20T15:53:05Z2012-02-16OLIVEIRA, Elaine Cardoso da Silva. Caracter?sticas do comportamento alimentar coordenado do boto-cinza Sotalia guianensis (Van B?neden, 1864) (Cetacea: Delphinidae) nas Ba?a de Sepetiba e Ba?a de Ilha Grande - RJ. 2012. 46 f. Disserta??o (Mestrado em Biologia Animal) - Instituto de Ci?ncias Biol?gicas e da Sa?de, Universidade Federal Rural do Rio de Janeiro, Serop?dica, 2012.https://tede.ufrrj.br/jspui/handle/jspui/3546The present study characterized the coordinated feeding behavior of two populations of estuarine dolphin Sotalia guianensis in southeastern of Brazil. In both bays were investigated coordinated feeding bouts, frequency of mean coordinated feeding tactics (Wall formation, Line Abreast, ?Kettle? and Perpendicular feeding), presence of jumps, group size engaged in each tactic, seasonality and presence of calves and juveniles during the coordinated feeding behavior. In Chapter 1 the coordinated feeding behavior of the Sepetiba Bay population was analyzed based on 29 boat trips of which 18 occurred in spring-summer period and 11 occurred in autumn-winter period from September 2000 to August 2001. In Chapter 2 a data comparison between Sepetiba Bay (Chapter 1) and Ilha Grande Bay populations (collected from May 2007 to March 2008) was made. Were observed 370 mean feeding tactics in Sepetiba Bay and 914 in Ilha Grande Bay. In a total, were quantified 239 feeding bouts with mean duration of 66,65s in Sepetiba Bay and 399 ?bouts? in Ilha Grande Bay with duration of 60 s ? 114 s. Statisticals differences of feeding bouts were encountered between the autumns-winter periods for the two bays with Sepetiba Bay presenting longer feeding bouts and higher frequency of tactics in the autumn-winter period than spring-summer period, and the opposite result for Ilha Grande Bay. In both bays, Wall formation was the feeding tactic more used by dolphins and with bigger group size, suggesting that this tactic has a better cost benefit relation for these two populations. The presence of jumps was observed, being more frequently seen in Ilha Grande Bay. In Sepetiba Bay, group size was significantly different between all feeding tactics, but showed no statistically difference for each tactic separately along the seasons. Among the two bays Mood?s Median test only showed significant difference in group size for the feeding tactics Wall formation and Line Abreast. Kruskal Wallis test was significantly different in group size for all feeding tactics along the seasons in the two bays. These differences in group size seems to be related with the chosen prey and the energy intakes of each tactic for each participant of the group. In Sepetiba Bay, calves and juveniles were observed in 227 groups (61.35%) whereas in llha Grande Bay these animals were present in 905 feeding tactics, being the frequency of feeding tactics with presence/ausence of these animals between the two bays statistically different. So, this estuarine complex is an ideal region for breeding and social learning of the several feeding tactics by the calves and juveniles. These regions can be considerate as important areas for this species conservation, requiring more management and preservation efforts.O presente estudo teve como principal objetivo caracterizar o comportamento alimentar coordenado de botos-cinzas Sotalia guianensis em duas ba?as da regi?o Sudeste do Brasil. Em ambas as ba?as, foi investigada a dura??o dos per?odos (bouts) de alimenta??o coordenada, a freq??ncia das t?ticas principais (?Pesca Oposta?, ?Chorus line?, ?Kettle? e ?Pesca Perpendicular?), presen?a de saltos, o tamanho de grupo engajado em cada t?tica, a sazonalidade e presen?a de indiv?duos imaturos durante o comportamento alimentar coordenado. No primeiro cap?tulo foi analisado o comportamento alimentar coordenado da popula??o de botos cinzas na Ba?a de Sepetiba durante 29 sa?das de barco, das quais 18 ocorreram na esta??o chuvosa (primavera e ver?o) e 11 na esta??o seca (outono e inverno) entre Setembro de 2000 e Agosto de 2001. No cap?tulo 2, foi feita uma compara??o entre os dados da popula??o da Baia de Sepetiba (Cap?tulo 1) e dados da Ba?a de Ilha Grande coletados durante o per?odo de maio de 2007 a mar?o de 2008. Foram observadas 370 t?ticas coordenadas principais na Baia de Sepetiba e 914 t?ticas coordenadas principais na Baia de Ilha Grande. Foram realizados 239 ?bouts? de alimenta??o com dura??o m?dia de 66,65s em Sepetiba e 399 ?bouts? em Ilha Grande com dura??o de 60 s ? 114 s. Foram encontradas diferen?as significativas dos bouts somente entre as esta??es secas das duas baias, com a Baia de Sepetiba apresentando bouts mais longos e maior frequencia de t?ticas na esta??o seca do que na chuvosa em Sepetiba e o oposto em Ilha Grande. Em ambas as ba?as, a ?Pesca Oposta? foi a t?tica coordenada mais realizada e com maior tamanho de grupo, sugerindo que esta t?tica apresenta um melhor custo benef?cio para os botos. Foi verificada presen?a de saltos, sendo mais freq?entes na Baia de Ilha Grande. Na Baia de Sepetiba, o tamanho de grupo foi significativamente diferente entre as t?ticas, por?m n?o diferiu estatisticamente dentro de cada t?tica entre as esta??es do ano. Entre as duas baias, o teste de Mediana de Mood mostrou diferen?a significativa no tamanho de grupo somente para as t?ticas coordenadas ?Pesca Oposta? e ?Chorus Line?. O teste Kruskal Wallis foi diferente significativamente para o tamanho de grupo de todas as t?ticas coordenadas nas esta??es do ano nas duas ?reas (p=0). Estas diferen?as no tamanho de grupo parecem estar relacionadas com o tipo de presa e o ganho energ?tico de cada t?tica para cada integrante do grupo. Indiv?duos imaturos (filhotes e juvenis) foram observados em 227 grupos (61,35%) na Baia de Sepetiba e em 905 t?ticas coordenadas (95%) na Baia de Ilha Grande, sendo significativamente diferente a freq??ncia de t?ticas com presen?a/aus?ncia destes animais entre as duas ba?as. Portanto, este complexo estuarino mostra-se adequado para a cria e aprendizado das diversas t?ticas de alimenta??o pelos filhotes. Esta regi?o pode ser considerada ent?o como um local importante para a conserva??o da esp?cie, necessitando de maior esfor?o de preserva??o e manejamento.Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2020-05-20T15:53:05Z No. of bitstreams: 1 2012 - Elaine Cardoso da Silva Oliveira.pdf: 1005627 bytes, checksum: a401fc6b54c4f33db7b8a5d0d223fd26 (MD5)Made available in DSpace on 2020-05-20T15:53:05Z (GMT). No. of bitstreams: 1 2012 - Elaine Cardoso da Silva Oliveira.pdf: 1005627 bytes, checksum: a401fc6b54c4f33db7b8a5d0d223fd26 (MD5) Previous issue date: 2012-02-16Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior, CAPES, Brasil.application/pdfhttps://tede.ufrrj.br/retrieve/59584/2012%20-%20Elaine%20Cardoso%20da%20Silva%20Oliveira.pdf.jpgporUniversidade Federal Rural do Rio de JaneiroPrograma de P?s-Gradua??o em Biologia AnimalUFRRJBrasilInstituto de Ci?ncias Biol?gicas e da Sa?deACEVEDO-GUTIERREZ, A. 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New Jersey: Prentice Hall, 1996. 662p.Sotalia guianensist?ticas coordenadascomportamento alimentarSotalia guianensiscoordinated tacticsfeeding behaviorZoologiaCaracter?sticas do comportamento alimentar coordenado do boto-cinza Sotalia guianensis (Van B?neden, 1864) (Cetacea: Delphinidae) nas Ba?a de Sepetiba e Ba?a de Ilha Grande - RJCoordinated feeding behavior of estuarine dolphin Sotalia guianensis (Van B?neden, 1864) (Cetacea: Delphinidae) in Sepetiba Bay and Ilha Grande Bay/RJinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da UFRRJinstname:Universidade Federal Rural do Rio de Janeiro (UFRRJ)instacron:UFRRJTHUMBNAIL2012 - Elaine Cardoso da Silva Oliveira.pdf.jpg2012 - Elaine Cardoso da Silva Oliveira.pdf.jpgimage/jpeg1943http://localhost:8080/tede/bitstream/jspui/3546/4/2012+-+Elaine+Cardoso+da+Silva+Oliveira.pdf.jpgcc73c4c239a4c332d642ba1e7c7a9fb2MD54TEXT2012 - Elaine Cardoso da Silva Oliveira.pdf.txt2012 - Elaine Cardoso da Silva Oliveira.pdf.txttext/plain127256http://localhost:8080/tede/bitstream/jspui/3546/3/2012+-+Elaine+Cardoso+da+Silva+Oliveira.pdf.txt0c8d2492e79174fe0c0649b6015ad4eeMD53ORIGINAL2012 - Elaine Cardoso da Silva Oliveira.pdf2012 - Elaine Cardoso da Silva Oliveira.pdfapplication/pdf1005627http://localhost:8080/tede/bitstream/jspui/3546/2/2012+-+Elaine+Cardoso+da+Silva+Oliveira.pdfa401fc6b54c4f33db7b8a5d0d223fd26MD52LICENSElicense.txtlicense.txttext/plain; charset=utf-82089http://localhost:8080/tede/bitstream/jspui/3546/1/license.txt7b5ba3d2445355f386edab96125d42b7MD51jspui/35462022-07-21 13:52:17.244oai:localhost: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Biblioteca Digital de Teses e Dissertaçõeshttps://tede.ufrrj.br/PUBhttps://tede.ufrrj.br/oai/requestbibliot@ufrrj.br||bibliot@ufrrj.bropendoar:2022-07-21T16:52:17Biblioteca Digital de Teses e Dissertações da UFRRJ - Universidade Federal Rural do Rio de Janeiro (UFRRJ)false
dc.title.por.fl_str_mv Caracter?sticas do comportamento alimentar coordenado do boto-cinza Sotalia guianensis (Van B?neden, 1864) (Cetacea: Delphinidae) nas Ba?a de Sepetiba e Ba?a de Ilha Grande - RJ
dc.title.alternative.eng.fl_str_mv Coordinated feeding behavior of estuarine dolphin Sotalia guianensis (Van B?neden, 1864) (Cetacea: Delphinidae) in Sepetiba Bay and Ilha Grande Bay/RJ
title Caracter?sticas do comportamento alimentar coordenado do boto-cinza Sotalia guianensis (Van B?neden, 1864) (Cetacea: Delphinidae) nas Ba?a de Sepetiba e Ba?a de Ilha Grande - RJ
spellingShingle Caracter?sticas do comportamento alimentar coordenado do boto-cinza Sotalia guianensis (Van B?neden, 1864) (Cetacea: Delphinidae) nas Ba?a de Sepetiba e Ba?a de Ilha Grande - RJ
Oliveira, Elaine Cardoso da Silva
Sotalia guianensis
t?ticas coordenadas
comportamento alimentar
Sotalia guianensis
coordinated tactics
feeding behavior
Zoologia
title_short Caracter?sticas do comportamento alimentar coordenado do boto-cinza Sotalia guianensis (Van B?neden, 1864) (Cetacea: Delphinidae) nas Ba?a de Sepetiba e Ba?a de Ilha Grande - RJ
title_full Caracter?sticas do comportamento alimentar coordenado do boto-cinza Sotalia guianensis (Van B?neden, 1864) (Cetacea: Delphinidae) nas Ba?a de Sepetiba e Ba?a de Ilha Grande - RJ
title_fullStr Caracter?sticas do comportamento alimentar coordenado do boto-cinza Sotalia guianensis (Van B?neden, 1864) (Cetacea: Delphinidae) nas Ba?a de Sepetiba e Ba?a de Ilha Grande - RJ
title_full_unstemmed Caracter?sticas do comportamento alimentar coordenado do boto-cinza Sotalia guianensis (Van B?neden, 1864) (Cetacea: Delphinidae) nas Ba?a de Sepetiba e Ba?a de Ilha Grande - RJ
title_sort Caracter?sticas do comportamento alimentar coordenado do boto-cinza Sotalia guianensis (Van B?neden, 1864) (Cetacea: Delphinidae) nas Ba?a de Sepetiba e Ba?a de Ilha Grande - RJ
author Oliveira, Elaine Cardoso da Silva
author_facet Oliveira, Elaine Cardoso da Silva
author_role author
dc.contributor.advisor1.fl_str_mv Sim?o, Sheila Marino
dc.contributor.advisor1ID.fl_str_mv 695.108.147-68
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/1704946542749907
dc.contributor.referee1.fl_str_mv Lodi, Liliane Ferreira
dc.contributor.referee2.fl_str_mv Ferreira, Ildemar
dc.contributor.authorID.fl_str_mv 116.221.227-63
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/8338137670918246
dc.contributor.author.fl_str_mv Oliveira, Elaine Cardoso da Silva
contributor_str_mv Sim?o, Sheila Marino
Lodi, Liliane Ferreira
Ferreira, Ildemar
dc.subject.por.fl_str_mv Sotalia guianensis
t?ticas coordenadas
comportamento alimentar
topic Sotalia guianensis
t?ticas coordenadas
comportamento alimentar
Sotalia guianensis
coordinated tactics
feeding behavior
Zoologia
dc.subject.eng.fl_str_mv Sotalia guianensis
coordinated tactics
feeding behavior
dc.subject.cnpq.fl_str_mv Zoologia
description The present study characterized the coordinated feeding behavior of two populations of estuarine dolphin Sotalia guianensis in southeastern of Brazil. In both bays were investigated coordinated feeding bouts, frequency of mean coordinated feeding tactics (Wall formation, Line Abreast, ?Kettle? and Perpendicular feeding), presence of jumps, group size engaged in each tactic, seasonality and presence of calves and juveniles during the coordinated feeding behavior. In Chapter 1 the coordinated feeding behavior of the Sepetiba Bay population was analyzed based on 29 boat trips of which 18 occurred in spring-summer period and 11 occurred in autumn-winter period from September 2000 to August 2001. In Chapter 2 a data comparison between Sepetiba Bay (Chapter 1) and Ilha Grande Bay populations (collected from May 2007 to March 2008) was made. Were observed 370 mean feeding tactics in Sepetiba Bay and 914 in Ilha Grande Bay. In a total, were quantified 239 feeding bouts with mean duration of 66,65s in Sepetiba Bay and 399 ?bouts? in Ilha Grande Bay with duration of 60 s ? 114 s. Statisticals differences of feeding bouts were encountered between the autumns-winter periods for the two bays with Sepetiba Bay presenting longer feeding bouts and higher frequency of tactics in the autumn-winter period than spring-summer period, and the opposite result for Ilha Grande Bay. In both bays, Wall formation was the feeding tactic more used by dolphins and with bigger group size, suggesting that this tactic has a better cost benefit relation for these two populations. The presence of jumps was observed, being more frequently seen in Ilha Grande Bay. In Sepetiba Bay, group size was significantly different between all feeding tactics, but showed no statistically difference for each tactic separately along the seasons. Among the two bays Mood?s Median test only showed significant difference in group size for the feeding tactics Wall formation and Line Abreast. Kruskal Wallis test was significantly different in group size for all feeding tactics along the seasons in the two bays. These differences in group size seems to be related with the chosen prey and the energy intakes of each tactic for each participant of the group. In Sepetiba Bay, calves and juveniles were observed in 227 groups (61.35%) whereas in llha Grande Bay these animals were present in 905 feeding tactics, being the frequency of feeding tactics with presence/ausence of these animals between the two bays statistically different. So, this estuarine complex is an ideal region for breeding and social learning of the several feeding tactics by the calves and juveniles. These regions can be considerate as important areas for this species conservation, requiring more management and preservation efforts.
publishDate 2012
dc.date.issued.fl_str_mv 2012-02-16
dc.date.accessioned.fl_str_mv 2020-05-20T15:53:05Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.citation.fl_str_mv OLIVEIRA, Elaine Cardoso da Silva. Caracter?sticas do comportamento alimentar coordenado do boto-cinza Sotalia guianensis (Van B?neden, 1864) (Cetacea: Delphinidae) nas Ba?a de Sepetiba e Ba?a de Ilha Grande - RJ. 2012. 46 f. Disserta??o (Mestrado em Biologia Animal) - Instituto de Ci?ncias Biol?gicas e da Sa?de, Universidade Federal Rural do Rio de Janeiro, Serop?dica, 2012.
dc.identifier.uri.fl_str_mv https://tede.ufrrj.br/jspui/handle/jspui/3546
identifier_str_mv OLIVEIRA, Elaine Cardoso da Silva. Caracter?sticas do comportamento alimentar coordenado do boto-cinza Sotalia guianensis (Van B?neden, 1864) (Cetacea: Delphinidae) nas Ba?a de Sepetiba e Ba?a de Ilha Grande - RJ. 2012. 46 f. Disserta??o (Mestrado em Biologia Animal) - Instituto de Ci?ncias Biol?gicas e da Sa?de, Universidade Federal Rural do Rio de Janeiro, Serop?dica, 2012.
url https://tede.ufrrj.br/jspui/handle/jspui/3546
dc.language.iso.fl_str_mv por
language por
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dc.publisher.none.fl_str_mv Universidade Federal Rural do Rio de Janeiro
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dc.publisher.department.fl_str_mv Instituto de Ci?ncias Biol?gicas e da Sa?de
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http://localhost:8080/tede/bitstream/jspui/3546/3/2012+-+Elaine+Cardoso+da+Silva+Oliveira.pdf.txt
http://localhost:8080/tede/bitstream/jspui/3546/2/2012+-+Elaine+Cardoso+da+Silva+Oliveira.pdf
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