34
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      The behavior of Sotalia guianensis (Van Bénéden) in Pernambuco coastal waters, Brazil, and a further analysis of its reaction to boat traffic Translated title: O comportamento de Sotalia guianensis (Van Bénéden) em águas costeiras de Pernambuco, Brasil, e uma análise adicional de sua reação ao tráfego de embarcações

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          There is still little knowledge about the behavior of the estuarine dolphins and also the way they react to the presence of different types of vessels. The aim of the present study was twofold: to investigate the behavior of estuarine dolphins in four locations in Pernambuco, Brazil, and also their reaction to the presence of common types of nautical crafts. The data of this study resulted from 48 fieldtrips to each of the four localities studied (ports of Recife and Suape, and beaches of Bairro Novo and Piedade), thus totaling 192 days of observations, with approximately 380 hours of actual sampling. Ten types of behavioral activities were counted for Bairro Novo beach and the port areas, but only four for Piedade beach. The greatest flows of boats were recorded in the port of Recife. Fishing boats were the commonest type in the port area of Recife and Bairro Novo beach, while tourist vessels predominated in the port of Suape and Piedade beach. During the observations of encounters between these boats and the estuarine dolphins, neutral reactions predominated for all the vessel types studied. The same type of reaction predominated when the distances at which the interactions between the animals and vessels occurred were correlated.

          Translated abstract

          Ainda se sabe pouco sobre o comportamento do boto-cinza, assim como a forma pela qual ele reage a diferentes tipos de embarcações. O presente estudo teve dois objetivos: investigar o comportamento dos botos-cinzas em quatro localidades de Pernambuco, Brasil, assim como a reação destes para com as embarcações náuticas comuns. Os dados foram coletados no período de setembro de 2004 a agosto de 2006, no horário das 6 às 17 h. Os dados desta pesquisa resultaram de 48 saídas a campo para cada uma das quatro localidades estudadas (Portos do Recife e Suape, praia de Bairro Novo e Piedade), totalizando 192 dias de observações, sendo aproximadamente 380 horas de amostragens efetivas. Foram contados dez tipos de atividades comportamentais para a praia de Bairro Novo e as áreas portuárias; e apenas quatro para a praia de Piedade. Com relação às embarcações, o maior fluxo foi registrado para o porto do Recife. Os barcos de pesca foram os mais freqüentes nas áreas do porto do Recife e da praia de Bairro Novo, enquanto que no porto de Suape e na praia de Piedade predominaram as embarcações de turismo. Durante as observações dos encontros dos barcos com os botos-cinza, houve uma predominância nas reações neutras para todos os tipos de embarcações estudadas. O mesmo tipo de reação predominou quando relacionadas as distâncias em que ocorreram as interações entre os animais e as embarcações.

          Related collections

          Most cited references49

          • Record: found
          • Abstract: found
          • Article: not found

          Decline in relative abundance of bottlenose dolphins exposed to long-term disturbance.

          Studies evaluating effects of human activity on wildlife typically emphasize short-term behavioral responses from which it is difficult to infer biological significance or formulate plans to mitigate harmful impacts. Based on decades of detailed behavioral records, we evaluated long-term impacts of vessel activity on bottlenose dolphins (Tursiops sp.) in Shark Bay, Australia. We compared dolphin abundance within adjacent 36-km2 tourism and control sites, over three consecutive 4.5-year periods wherein research activity was relatively constant but tourism levels increased from zero, to one, to two dolphin-watching operators. A nonlinear logistic model demonstrated that there was no difference in dolphin abundance between periods with no tourism and periods in which one operator offered tours. As the number of tour operators increased to two, there was a significant average decline in dolphin abundance (14.9%; 95% CI=-20.8 to -8.23), approximating a decline of one per seven individuals. Concurrently, within the control site, the average increase in dolphin abundance was not significant (8.5%; 95% CI=-4.0 to +16.7). Given the substantially greater presence and proximity of tour vessels to dolphins relative to research vessels, tour-vessel activity contributed more to declining dolphin numbers within the tourism site than research vessels. Although this trend may not jeopardize the large, genetically diverse dolphin population of Shark Bay, the decline is unlikely to be sustainable for local dolphin tourism. A similar decline would be devastating for small, closed, resident, or endangered cetacean populations. The substantial effect of tour vessels on dolphin abundance in a region of low-level tourism calls into question the presumption that dolphin-watching tourism is benign.
            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            The Hidden Cost of Tourism: Detecting Long-term Effects of Tourism Using Behavioral Information

              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              DIURNAL BEHAVIOR OF FREE-RANGING BOTTLENOSE DOLPHINS IN THE KVARNERIĆ (NORTHERN ADRIATIC SEA)1

                Bookmark

                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rbzool
                Revista Brasileira de Zoologia
                Rev. Bras. Zool.
                Sociedade Brasileira de Zoologia (Curitiba )
                0101-8175
                March 2008
                : 25
                : 1
                : 1-9
                Affiliations
                [1 ] Universidade Federal de Pernambuco Brazil
                [2 ] Universidade Federal de Pernambuco Brazil
                [3 ] Universidade do Estado do Rio de Janeiro Brasil
                Article
                S0101-81752008000100001
                10.1590/S0101-81752008000100001
                fc1ebba9-f3c4-4855-9e0d-2d70bd827e87

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0101-8175&lng=en
                Categories
                ZOOLOGY

                Animal science & Zoology
                Behavioral repertoire,estuarine dolphins,vessels,Boto-cinza,embarcações,repertório comportamental

                Comments

                Comment on this article

                scite_

                Similar content453

                Cited by3

                Most referenced authors334