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Previous issue date: 2009-02-13 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / This study investigated factors that influence the group size during the behavior foraging of estuarine dolphin Sotalia guianensis in the coast south of the state Rio Grande do Norte (RN), it also characterized the diet of estuarine dolphins and elaborated an otoliths catalog for aid in the identification of the preys found in the stomach contents. In relation to the group size during behaviour foraging, inside of the Curral Bay, larger frequency of solitary hunt was observed. Factors as tide variation, group composition and seasons didn't present correlation with the number of animals observed during a feeding episode. Capture success for participant was shown significantly larger when the animals hunted alone, what possibly explains the largest frequency of solitary hunt inside of the Curral Bay. About diet, were identified 18 bone fishes species, with predominance of species the families Haemulidae and Sciaenidae and five cephalopods species, including two new species in the diet of Sotalia guianensis in Brazil. Our results indicated that estuarine dolphin in the coast oriental from Rio Grande do Norte (RN) feeds predominantly of fish that form shoal, of habitat estuarino and producing of sounds. The analysis of the images, otoliths of 43 species of coastal fish of the coast of the state of Rio Grande do Norte (RN), aided by the offered descriptions, demonstrated to be an effective methodology for the knowledge of those structures, as well as it represented a form of reducing the subjectivity in the identification of the bone fishes found in stomach content / Esse trabalho investigou os fatores que influenciam o tamanho de grupo durante o comportamento alimentar do boto cinza Sotalia guianensis no litoral sul do estado do Rio Grande do Norte (RN), tamb?m caracterizou a dieta dessa esp?cie na regi?o e elaborou um cat?logo de ot?litos para auxiliar ? identifica??o das presas encontradas nos conte?dos estomacais dos animais analisados. Em rela??o ao tamanho de grupo durante o forrageio, dentro da enseada do curral, foi observado maior freq??ncia de ca?a solit?ria. Fatores como varia??o de mar?, composi??o de grupo e esta??es do ano n?o apresentaram correla??o com o n?mero de animais observados durante um epis?dio de alimenta??o. Contudo, o sucesso de captura por participante mostrou-se significativamente maior quando os animais ca?avam sozinhos, o que possivelmente explica a maior freq??ncia de ca?a solit?ria dentro dessa enseada. Sobre a caracteriza??o da dieta, foram identificadas 18 esp?cies de tele?steos, com predomin?ncia de esp?cies pertencentes ?s fam?lias Haemulidae e Sciaenidae e cinco esp?cies de cefal?podes, incluindo duas esp?cies ainda n?o registradas na dieta de Sotalia guianensis no Brasil. De acordo com as informa??es sobre a dieta, o boto cinza no litoral oriental do Rio Grande do Norte (RN) alimenta-se predominantemente de peixes que formam cardume, de habitat estuarino e produtores de sons. A an?lise das imagens dos ot?litos de 43 esp?cies de peixes costeiros do litoral do estado do Rio Grande do Norte (RN) demonstrou ser uma metodologia eficaz, bem como representou uma forma de diminuir a subjetividade na identifica??o dos tele?steos encontrado em conte?do estomacal
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/17206 |
| Date | 13 February 2009 |
| Creators | Pansard, Kelly Cristina Ara?jo |
| Contributors | CPF:99079682853, http://lattes.cnpq.br/1410667846560350, Souza, Arrilton Ara?jo de, CPF:31568769415, http://lattes.cnpq.br/8822052460371633, Silva, Fl?vio Jos? de Lima, CPF:48554867472, http://lattes.cnpq.br/1421802360229451, Lopes, Paulo C?sar de Azevedo Sim?es, CPF:50028162072, http://lattes.cnpq.br/5403765777051256, Nogueira, Selene Siqueira da Cunha, CPF:10076684822, http://lattes.cnpq.br/7824824785994078, Yamamoto, Maria Em?lia |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Psicobiologia, UFRN, BR, Estudos de Comportamento; Psicologia Fisiol?gica |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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