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Group structure of Sotalia guianensis in the bays on the coast of Paraná State, south of Brazil

Published online by Cambridge University Press:  05 June 2009

Gislaine de Fatima Filla*
Affiliation:
Instituto de Pesquisas Cananéia (IPeC), Cananéia SP, Brazil Pós-Gradução em Zoologia (UFPR), Curitiba, PR, Brazil
Emygdio Leite de Araujo Monteiro-Filho
Affiliation:
Instituto de Pesquisas Cananéia (IPeC), Cananéia SP, Brazil Departamento de Zoologia (UFPR), Curitiba, PR, Brazil
*
Correspondence should be addressed to: G. de Fatima Filla, Rua Martin Afonso, 699, CEP 80430-100—Curitiba, PR, Brazil email: gica_filla@yahoo.com.br

Abstract

To determine the group structure of Sotalia guianensis on the coast of Paraná State, two bays, Baía de Paranaguá and Baía de Guaratuba, were surveyed between March 1999 and February 2000 and between July 2002 and June 2003 respectively. The heterogeneity of the studied areas was considered a relevant factor, therefore these areas were sectored and each sector was investigated independently. The surveys were carried out through boat line transects and all the animals were registered, even those localized between two transects. The records were taken for the quantity of groups as well as for the amount of individuals in each group and, whenever possible, the individuals were classified as calves or adults. The data were treated both separately and comparatively between the two bays and amongst the sectors of each bay. In Baía de Paranaguá, 735 individuals were registered, divided into 253 groups which varied from 2 to 37 individuals for an average of 2.9 individuals per group. Most of the groups presented a family formation (59.29%) and were observed during the morning. The individuals that were clearly identified as calves represented 24% of the total (176 individuals), adults 55% (405 individuals) and 21% (154 individuals) were impossible to determine. In Baía de Guaratuba, only 32 S. guianensis individuals were observed and distributed into 14 groups for an average of 2.13 individuals per group. These groups varied from 2 to 6 individuals mostly in family formations (50%). The same quantity of individuals and groups was observed during different periods of the day. Of the 32 sampled individuals, 25 (78%) were adults, only one was a calf (3%) and 6 (19%) were undetermined.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 2009

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References

REFERENCES

Aliaga-Rossel, E. (2002) Distribution and abundance of the river dolphin (Inia geoffrensis) in the Tijamuchi River, Beni, Bolivia. Aquatic Mammals 28, 312323.Google Scholar
Barco, S.G., Swingle, W.M., Mclellan, W.A., Harris, R.N. and Pabst, D.A. (1999) Local abundance and distribution of bottlenose dolphin (Tursiops truncatus) in the nearshore waters of Virginia Beach, Virginia. Marine Mammal Science 15, 394408.CrossRefGoogle Scholar
Barham, E.G., Sweenecy, C.J., Leatherwood, S., Beegs, R.K. and Barham, C.L. (1980) Aerial census of the bottlenose dolphin, Tursiops truncatus, in a region of the Texas coast. Fishery Bulletin 77, 585595.Google Scholar
Bigarella, J.J. (1978) A Serra do Mar e a porção do Estado do Paraná um problema de segurança ambiental e nacional (contribuição à geografia, geologia e ecologia regional). Curitiba: Secretaria de Estado do Planejamento, Associação de Defesa e Educação Ambiental (ADEA).Google Scholar
Bodmer, R., Fang, T. and Puertas, P. (2007) Wildlife populations in the Pacaya-Samiria National Reserve, Peru. Report for BSES, 29 pp.Google Scholar
Bonin, C.A., Filla, G.F. and Monteiro-Filho, E.L.A. (2008) Densidade populacional: métodos e implicações. In Monteiro-Filho, E.L.A. and Monteiro, K.D.K.A. (eds) Biologia, ecologia e conservação do boto-cinza. São Paulo, SP, Brasil: Páginas & Letras Editora e Gráfica LTDA, pp. 177192.Google Scholar
Brandini, F.P., Thamm, C.A.C. and Ventura, I. (1988) Ecological studies in the Bay of Paranagua.III. Seasonal and spatial variations of nutrients and chlorophyll-a. Nerítica 3, 130.Google Scholar
Caballero, S., Trujillo, F., Vianna, J.A., Barrios-Garrido, H., Montiel, M.G., Beltrán-Pedreros, S., Marmontel, M., Santos, M.C., Rossi-Santos, M., Santos, F.R. and Baker, C.S. (2007) Taxonomic status of the genus Sotalia: species level ranking for ‘tucuxi’ (Sotalia fluviatilis) and ‘costero’ (Sotalia guianensis) dolphins. Marine Mammal Science 23, 358386.CrossRefGoogle Scholar
Carvalho, C.T. (1963) Sobre um boto comum no litoral do Brasil (Cetacea, Delphinidae). Revista Brasileira de Biologia 23, 263276.Google Scholar
Chaves, P.T.C. (1995) Atividade reprodutiva de Bairdiella ronchus (Cuvier) (Pisces, Sciaenidae) na Baía de Guaratuba, Paraná, Brasil. Revista Brasileira de Zoologia 12, 759766.CrossRefGoogle Scholar
Cunha, H.A., da Silva, V.M.F., Lailson-Brito Jr, J., Santos, M.C.O., Flores, P.A., Martin, A.R., Azevedo, A.F., Fragoso, A.B.L., Zanelatto, R.C. and Solé-Cava, A.M. (2005) Riverine and marine ecotypes of Sotalia dolphins are different species. Marine Biology 148, 449457.CrossRefGoogle Scholar
Daura-Jorge, F.G., Wedekin, L.L., Piacentini, V.Q. and Simões-Lopes, P.C. (2005) Seasonal and daily patterns of group size, cohesion and activity of the estuarine dolphin, Sotalia guianensis (P.J. van Bénéden) (Cetacea, Delphinidae), in southern Brazil. Revista Brasileira de Zoologia 22, 10141021.CrossRefGoogle Scholar
Edwards, H.H. and Schnell, G.D. (2001) Status and ecology of Sotalia fluviatilis in the Cayos Miskito Reserve, Nicaragua. Marine Mammal Science 17, 445472.CrossRefGoogle Scholar
Fernandes-Pinto, E. (1997) Composição, estrutura e distribuição espaço-temporal da ictiofauna na região da Enseada do Benito, Guaraqueçaba (PR, BR). Monografia de Bacharelado (Curso de Ciências Biológicas), Universidade Federal do Paraná, Curitiba, Brasil.Google Scholar
Flach, L., Flach, P.A. and Chiarello, A.G. (2008) Aspects of behavioural ecology of Sotalia guianensis in Sepetiba Bay, southeast Brazil. Marine Mammal Science 24, 503515.CrossRefGoogle Scholar
Gaskin, D.E. (1982) The ecology of whales and dolphins. 1st edition. London: Heinemann.Google Scholar
Geise, L. (1991) Sotalia guianensis (Cetácea, Delphinidae) population in the Guanabara Bay, Rio de Janeiro, Brazil. Mammalia 55, 371379.CrossRefGoogle Scholar
Geise, L., Gomes, N. and Cerqueira, R. (1999) Behaviour, habitat use and population size of Sotalia fluviatilis (Gervais, 1853) (Cetacea, Delphinidae) in the Cananéia Estuary region, São Paulo, Brazil. Revista Brasileira de Biologia 59, 183194.CrossRefGoogle Scholar
Griffin, R.B. and Griffin, N.J. (2004) Temporal variation in Atlantic spotted dolphin (Stenella frontalis) and bottlenose dolphin (Tursiops truncatus) densities on the West Florida Continental Shelf. Aquatic Mammals 30, 380390.Google Scholar
IPARDES (1989) Fundação Edison Vieira. Zoneamento do Litoral Paranaense. Curitiba, PR. 175 pp.Google Scholar
Knoppers, B.A., Brandini, F.P. and Thamm, C.A. (1987) Ecological studies in the Bay of Paranaguá II. Some physical and chemical characteristics. Nerítica 2, 136.Google Scholar
Lana, P.C., Marone, E., Lopes, R.M. and Machado, E.C. (2000) The subtropical estuarine complex of Paranaguá Bay, Brazil. In Seeliger, U. and Kjerfve, B. (eds) Ecological studies of coastal ecosystems of Latin America. Berlin and Heidelberg: Springer Verlag, pp. 131145.Google Scholar
Leatherwood, S. (1979) Aerial census of bottlenose dolphin, Tursiops truncatus, and the West Indian manatee, Trichechus manatus, in the Indian and Banana Rivers, Florida. Fishery Bulletin 77, 4859.Google Scholar
Leatherwood, S., Reeves, R.R. and Show, I.T. (1982) Effects of varying altitude on aerial surveys of bottlenose dolphins. Report of the International Whaling Commission 32, 569575.Google Scholar
Lodi, L. (2003) Tamanho e composição de grupo dos botos-cinza, Sotalia guianensis (van Bénéden, 1864) (CETACEA, DELPHINIDAE), na Baía de Paraty, Rio de Janeiro, Brasil. Atlântica 25, 135146.Google Scholar
Lodi, L. and Hetzel, B. (1998) Grandes agregações do boto-cinza (Sotalia fluviatilis) na Baía da Ilha Grande, Rio de Janeiro. Revista Bioikos 12, 2630.Google Scholar
Magnusson, W.E., Best, R.C. and da Silva, V.M.F. (1980) Numbers and behaviour of Amazonian dolphins, Inia geoffrensis and Sotalia fluviatilis fluviatilis, in the Rio Solimões, Brazil. Aquatic Mammals 8, 2731.Google Scholar
Mann, J., Connor, R.C., Barre, L.M. and Heithaus, M.R. (2000) Female reproductive success in bottlenose dolphin (Tursiops sp.): life history, habitat, provisioning, and group-size effects. Behavioral Ecology 11, 210219.CrossRefGoogle Scholar
Margarido, T.C.C. and Braga, F.G. (2004) Mamíferos. In Mikich, S.B. and Bérnils, R.S. (eds) Livro Vermelho da Fauna Ameaçada no Estado do Paraná. Accessible at http://www.pr.gov.br/iap. Accessed 1 October 2007.Google Scholar
Matthews, L.H. (1988) Biologia de los cetáceos, 1st edition. New York: Columbia University Press, 86 pp.Google Scholar
Monteiro-Filho, E.L.A. (1992) Pesca associada entre golfinhos e aves marinhas. Revista Brasileira de Zoologia 9, 2937.CrossRefGoogle Scholar
Monteiro-Filho, E.L.A. (1995) Pesca interativa entre o golfinho Sotalia f. guianensis e a comunidade pesqueira de Cananéia. Boletim do Instituto de Pesca de São Paulo 22, 1523.Google Scholar
Monteiro-Filho, E.L.A. (2000) Group organization of the dolphin Sotalia fluviatilis guianensis in an estuary of southeastern Brazil. Ciência e Cultura Journal of the Brazilian Association for the Advancement of Science 52, 97101.Google Scholar
Monteiro-Filho, E.L.A., Bonin, C.A. and Rautenberg, M. (1999) Interações interespecíficas dos mamíferos marinhos da região de Guaratuba, litoral sul do Estado do Paraná. Biotemas 12, 119132.Google Scholar
Monteiro-Filho, E.L.A., Reis, S.F. and Monteiro, L. (2002) Skull shape and size divergence in dolphins of the genus Sotalia: a tridimensional morphometric analysis. Journal of Mammalogy 83, 125134.2.0.CO;2>CrossRefGoogle Scholar
Monteiro-Filho, E.L.A., Filla, G.F., Domit, C. and de Oliveira, L.V. (2006) Cetacea. In Reis, N.R., Peracchi, A.L., Pedro, W.A. and Lima, I.P. (eds) Mamíferos do Brasil. Londrina, PR, Brasil, pp. 305341.Google Scholar
Monteiro-Filho, E.L.A., Neto, M.M.S. and Domit, C. (2008) Comportamento de filhotes. In Monteiro-Filho, E.L.A. and Monteiro, K.D.K.A. (eds) Biologia, ecologia e conservação do boto-cinza. São Paulo, SP, Brasil: Páginas & Letras Editora e Gráfica LTDA, pp. 127137.Google Scholar
Netto, S.A. (1993) Composição, distribuição e variabilidade sazonal da macrofauna bêntica de marismas e bancos não-vegetados da Baía de Paranaguá (Paraná, Braisl). Masters thesis. Universidade Federal do Paraná, Curitiba, Brasil.Google Scholar
Oliveira, J.A., Ávila, F.J.C., Alves Júnior, T.T., Furtado-Neto, M.A.A. and Monteiro-Neto, C. (1995) Monitoramento do Boto cinza, Sotalia fluviatilis (CETACEA: DELPHINIDAE) em Fortaleza, Estado do Ceará, Brasil. Arquivo de Ciência do Mar 29, 2835.Google Scholar
Oliveira, M.R., Rosas, F.C.W., Pinheiro, P.C. and Santos, R.A. (2008) Alimentação. In Monteiro-Filho, E.L.A. and Monteiro, K.D.K.A. (eds) Biologia, ecologia e conservação do boto-cinza. São Paulo, SP, Brasil: Páginas & Letras Editora e Gráfica LTDA, pp. 91101.Google Scholar
Randi, M.M.A.F., Rassolin, P., Monteiro-Filho, E.L.A. and Rosas, F.C.W. (2008) Variação do padrão de coloração. In Monteiro-Filho, E.L.A. and Monteiro, K.D.K.A. (eds) Biologia, ecologia e conservação do boto-cinza. São Paulo, SP, Brasil: Páginas & Letras Editora e Gráfica LTDA, pp. 1116 .Google Scholar
Rautenberg, M. and Monteiro-Filho, E.L.A. (2008) Cuidado Parental. In Monteiro-Filho, E.L.A. and Monteiro, K.D.K.A. (eds) Biologia, ecologia e conservação do boto-cinza. São Paulo, SP, Brasil: Páginas & Letras Editora e Gráfica LTDA, pp. 139155 .Google Scholar
Rosas, F.C.W. and Monteiro-Filho, E.L.A. (2002) Reproduction of the estuarine dolphin (Sotalia guianensis) on the coast of Paraná, southern Brazil. Journal of Mammalogy 83, 507515.2.0.CO;2>CrossRefGoogle Scholar
Rose, B. and Payne, A.I.L. (1991) Occurrence and behaviour of the southern right whale dolphin Lissodelphis peronii off Namibia. Marine Mammal Science 7, 2534.CrossRefGoogle Scholar
Santos, M.C.O. and Rosso, S. (2008) Social organization of marine tucuxi dolphins, Sotalia guianensis, in the Cananéia Estuary of southeastern Brazil. Journal of Mammalogy 89, 347355.CrossRefGoogle Scholar
da Silva, V.M.F. and Best, R.C. (1996) Sotalia fluviatilis. Mammalian Species 527, 17.Google Scholar
SIMEPAR (2007) Tecnologia e informações ambientais. Accessible at http://www.simepar.br. Accessed 1 May 2007.Google Scholar
Simões-Lopes, P.C. (1988) Sobre a ampliação da distribuição do gênero Sotalia Gray, 1866 (Cetacea, Delphinidae), para as águas do Estado de Santa Catarina, Brasil. Biotemas 1, 5862.Google Scholar
Thompson, P.M., Lusseau, D., Corkrey, R. and Hammond, P.S. (2004) Moray Firth bottlenose dolphin monitoring strategy options. Scottish Natural Heritage Commissioned Report No. 079 (ROAME No. F02AA409), 52 pp.Google Scholar
Veloso, H.P., Rangel Filho, A.L.R. and Lima, J.C.A. (1991) Classificação da vegetação brasileira adaptada a um sistema universal. Rio de Janeiro: Fundação Instituto Brasileiro de Geografia e Estatística, 123 pp.Google Scholar
Vendel, A.L. and Chaves, P.T.C. (1998) Alimentação de Bardiella ronchus (Cuvier) (Perciformes, Sciaenidae) na Baía de Guaratuba, Paraná, Brasil. Revista Brasileira de Zoologia 15, 297306.CrossRefGoogle Scholar
Vidal, O., Barlow, J., Hurtago, L.A., Torre, J., Cedón, P. and Ojeda, Z. (1997) Distribution and abundance of the Amazon River dolphin (Inia geoffrensis) and tucuxi (Sotalia fluviatilis) in the upper Amazon River. Marine Mammal Science 13, 427445.CrossRefGoogle Scholar
Vonhof, M.J., Whitehead, H. and Fenton, M.B. (2004) Analysis of Spix's disc-winged bat association patterns and roosting home ranges reveal a novel social structure among bats. Animal Behaviour 68, 507521.CrossRefGoogle Scholar