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Previous issue date: 2012-03-22 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / The aerial activities, leaps and slaps with parts of the body in the surface of water, are part of the behavioral repertoire of several species of cetaceans. Among them, the spinner dolphin, Stenella longirostris, shows greater diversity in such behavior. For the spinner dolphins of Fernando de Noronha, the aerial activities are classified as vertical and horizontal, with eight patterns to be noted (tail slap, head slap, motor boating, partial leap, leap, spin, tail over head and tail over head with spin) discriminated between these categories. Such behaviors can be used as a parameter to identify behavioral changes, as well as patterns of daily and seasonal activity. In this manner, this study aimed to characterize the frequency in performance of such activity while the dolphins were within the Dolphin Bay of Fernando de Noronha, and verify possible daily and seasonal hourly fluctuations on such behaviors. The data analyzed in this study was acquired during the period of January 2006 through December 2010, totaling 1431 days of observation from land set point, with 113027 aerial activities registered, daily average of 72,27 (SD=96,10). During 5478h and 54 min of observation the horizontal aerial activity was the most observed and rotation was the most executed pattern. Greater frequency of execution of aerial activity was observed in adults, but for both adults and calves, was observed a predominance of horizontal activities, with spin being the pattern most executed. Positive correlation was observed between the amount of aerial activity performed and the number of animals inside the Bay. Hourly daily fluctuation was observed in the expression of aerial activities by spinner dolphins, and was observed a peak of activity between 8h and 8h59min for the overall frequency relative of aerial activities, as well as for the categories and patterns. Seasonal differences were observed between the rainy and dry season with the greater amount of activity being observed during the rainy season. Nevertheless, the same profile of frequency relative of aerial activity was observed in both seasons with the peak
amount being during the same period. When discriminated the aerial activities in categories and patterns, for both seasons, there was a similar pattern of hourly fluctuation; for most of parameters, higher frequency relative of execution of aerial activity remain between 8h and 8h59min / As atividades a?reas, saltos e batidas com partes do corpo na superf?cie da ?gua, comp?em parte do repert?rio comportamental de diversas esp?cies de cet?ceos. Dentre elas, acredita-se que o golfinho-rotador, Stenella longirostris, seja a esp?cie que apresenta maior agilidade em tais comportamentos. Para os golfinhos-rotadores de Fernando de Noronha, as atividades a?reas s?o categorizadas em atividades a?reas verticais e horizontais, sendo oito (batida de cauda, batida de cabe?a, motor de popa, ca?da, salto, rota??o, invers?o e pirueta) os padr?es discriminados entre essas classes. Tais comportamentos podem ser usados como par?metros para identificar altera??es comportamentais, bem como os padr?es de atividade di?ria e sazonais. Desta forma, o presente estudo teve por objetivo caracterizar a frequ?ncia de execu??o de atividades a?reas no decorrer do per?odo em que os golfinhos-rotadores permanecem dentro da Ba?a dos Golfinhos de Fernando de Noronha, bem como verificar a exist?ncia de poss?veis flutua??es hor?rias di?rias e sazonais na exibi??o de tais comportamentos. Para isso, foram analisados dados que compreendem o per?odo entre janeiro de 2006 a dezembro de 2010, totalizando 1.431 dias de observa??o em ponto fixo, sendo registradas 113.027 atividades a?reas, m?dia di?ria de 72,27 (DP=96,10). Nas 5.478 horas e 54 minutos de observa??o, as atividades a?reas horizontais foram observadas em maior frequ?ncia, sendo a rota??o o padr?o mais executado. Maior frequ?ncia de execu??o das atividades a?reas foi observada em indiv?duos adultos, mas tanto para adultos quanto para filhotes, observou-se predom?nio das atividades horizontais, com a rota??o sendo o padr?o mais executado. Correla??o positiva foi observada entre a quantidade de atividades a?reas executadas e o n?mero de animais dentro da Ba?a. Flutua??o hor?ria di?ria foi observada na express?o das atividades a?reas pelos golfinhos-rotadores, sendo observado maior pico de atividade no hor?rio entre 8h e 8h59min, tanto para a frequ?ncia relativa total de atividades a?reas, quanto para as classes e os padr?es. Diferen?as entre as esta??es clim?ticas seca e chuvosa foram observadas, com maior registro de atividade a?rea durante o per?odo de chuvas. Entretanto, o perfil de distribui??o da frequ?ncia relativa de atividades a?reas se assemelha para ambas as esta??es, mantendo o hor?rio de maior pico de atividade. Quando discriminadas as atividades a?reas nas classes e nos padr?es considerados, para ambas as esta??es observaram-se padr?o de flutua??o hor?ria semelhante; para a maioria dos par?metros analisados, maior frequ?ncia relativa de execu??o das atividades a?reas se mant?m entre 8h e 8h59min
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/17328 |
| Date | 22 March 2012 |
| Creators | Carli, Rita de C?ssia de |
| Contributors | CPF:48554867472, http://lattes.cnpq.br/1421802360229451, Nascimento, L?dio Fran?a do, CPF:79220118491, http://lattes.cnpq.br/4998738063796069, Silva J?nior, Jos? Martins da, CPF:38669536072, http://lattes.cnpq.br/1133638779776273, Silva, Fl?vio Jos? de Lima |
| 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/masterThesis |
| 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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