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Geographical variation in franciscana (Pontoporia blainvillei) external morphology

Published online by Cambridge University Press:  13 July 2011

Beatriz H.A. Barbato ,
Eduardo R. Secchi ,
Ana Paula M. Di Beneditto ,
Renata M.A. Ramos ,
Carolina Bertozzi ,
Juliana Marigo ,
Pablo Bordino  and
Paul G. Kinas
Beatriz H.A. Barbato*
Affiliation:
Programa de Pós-Graduação em Oceanografia Biológica, Universidade Federal do Rio Grande, PO Box 474, Rio Grande, Rio Grande do Sul, 96201-900, Brazil
Eduardo R. Secchi
Affiliation:
Laboratório de Tartarugas e Mamíferos Marinhos, Instituto de Oceanografia, Universidade Federal do Rio Grande, PO Box 474, Rio Grande, Rio Grande do Sul, 96201-900, Brazil
Ana Paula M. Di Beneditto
Affiliation:
Laboratório de Ciências Ambientais, Universidade Estadual do Norte Fluminense, Avenida Alberto Lamego, 2000, Campos dos Goyatacazes, Rio de Janeiro, 28013-602, Brazil
Renata M.A. Ramos
Affiliation:
Everest Tecnologia em Serviços Ltda, Avenida Nossa Senhora dos Navegantes, 675/1201, Vitória, Espírito Santo, 29056-900, Brazil
Carolina Bertozzi
Affiliation:
Projeto Biopesca, R Paraguai, 241, Praia Grande, 11702-070, São Paulo, Brazil
Juliana Marigo
Affiliation:
Projeto Biopesca, R Paraguai, 241, Praia Grande, 11702-070, São Paulo, Brazil
Pablo Bordino
Affiliation:
Fundación Aquamarina, CECIM, Del Sauce 748, Pinamar, Buenos Aires B7167BSN, Argentina
Paul G. Kinas
Affiliation:
Laboratório de Estatística Ambiental, Instituto de Matemática, Estatística e Física, Universidade Federal do Rio Grande, PO Box 474, Rio Grande, Rio Grande do Sul, 96201-900, Brazil
*
Correspondence should be addressed to: Beatriz H.A. Barbato, Programa de Pós-Graduação em Oceanografia Biológica, Universidade Federal do Rio Grande, PO Box 474, Rio Grande, Rio Grande do Sul, 96201-900, Brazil email: [email protected]
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Abstract

Four distinct Franciscana Management Areas (FMAs) have been proposed based on several lines of evidence including genotype, phenotype, population response and distribution. To determine if differences in external morphology fit this division, a canonical variate analysis was carried out for males and/or females from FMAs I to IV using up to 14 characters. A total of 78 adult specimens were analysed. More than 90% of the differences between groups were summarized by three canonical variates. Females were larger than males in all areas. Females from FMA IV were of intermediate length between those from FMA I and FMA III and individuals from FMA II were smaller than those from all other areas. Position of dorsal fin and morphology of the anterior body region, differentiate individuals from FMA I and FMA III. Morphological differences found in this study give additional support for the proposed FMAs. Since habitat characteristics and franciscana feeding ecology vary regionally, it is possible that observed morphological differences are due to ecological divergence for niche occupation. The indication of a discontinuous distribution, consistency between genetic and morphological evidence, and a short time genetic divergence, might indicate that franciscanas inhabiting FMA I represent a distinct subspecies.

Keywords

Pontoporia blainvilleistock identityexternal morphologymultiple-group principal component analysiscanonical variate analysissouth-western Atlantic
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 92 , Issue 8: Marine Mammals , December 2012 , pp. 1645 - 1656
Copyright
Copyright © Marine Biological Association of the United Kingdom 2011

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References

REFERENCES

Andrade, A.L.V., Pinedo, M.C. and Pereira, J. Jr (1997) The gastrointestinal helminths of franciscana, Pontoporia blainvillei, in Southern Brazil. Reports of the International Whaling Commission 47, 669–673.Google Scholar
Avise, J.C. (2000) Philogeography: the history and formation of species. London: Harvard University Press.CrossRefGoogle Scholar
Aznar, F.J., Raga, J.A., Corcuera, J. and Monzon, F. (1995) Helminths as biological tags for franciscanas Pontoporia blainvillei (Cetacea: Pontoporiidae) in Argentinian and Uruguayan waters. Mammalia 59, 427–435.CrossRefGoogle Scholar
Baker, A.L., Smith, A.N.H. and Pichler, F.B. (2002) Geographical variation in Hector's dolphin: recognition of new subspecies of Cephalorhynchus hectori. Journal of the Royal Society of New Zealand 32, 713–727.CrossRefGoogle Scholar
Barreto, A.S. and Rosas, F.C.W. (2006) Comparative growth analysis of two populations of Pontoporia blainvillei on the Brazilian coast. Marine Mammal Science 22, 644–653.CrossRefGoogle Scholar
Bassoi, M. (2005) Feeding ecology of franciscana dolphin, Pontoporia blainvillei (Cetacea: Pontoporiidae), and oceanographic processes on the Southern Brazilian coast. PhD thesis. University of Southampton, Southampton, UK.Google Scholar
Chatfield, C. and Collins, A.J. (1980) Introduction to multivariate analysis. London: Chapman & Hall.CrossRefGoogle Scholar
Chivers, S.J. (2009) Cetacean life history. In Perrin, W.F., Würsig, B. and Thewissen, J.G.M. (eds) Encyclopedia of marine mammals. San Diego, CA: Academic Press, pp. 215–220.CrossRefGoogle Scholar
Christensen, I., Haug, T. and Wiig, O. (1990) Morphometric comparison of minke whales Balaenoptera acutorostrata from different areas of the North Atlantic. Marine Mammal Science 6, 327–338.CrossRefGoogle Scholar
Costa, P., Lessa, E.P. and Secchi, E.R. (2008) Microestrutura poblacional del delfin franciscana, Pontoporia blainvillei. In XIII Reunión de Trabajo de Especialistas en Mamíferos Acuáticos de América del Sur, SOLAMAC, Montevideo, 13–17 Octubre, p. 126.Google Scholar
Dawson, S.M. (2002) Cephalorhynchus dolphins Cephalorhynchus heavisidii, C. eutropia, C. hectori and C. commersonii. In Perrin, W.F., Würsig, B. and Thewissen, J.G.M. (eds) Encyclopedia of marine mammals. San Diego, CA: Academic Press, pp. 200–203.Google Scholar
Di Beneditto, A.P.M. and Ramos, R.M.A. (2001) Biology and conservation of the franciscana (Pontoporia blainvillei) in the north of Rio de Janeiro State, Brazil. Journal of Cetacean Research and Management 3, 185–192.CrossRefGoogle Scholar
Dizon, A.E., Lockyer, C., Perrin, W.F., Demaster, D.P. and Seisson, J. (1992) Rethinking the stock concept: a phylogeographic approach. Conservation Biology 6, 24–36.CrossRefGoogle Scholar
Fitch, J.E. and Brownell, R.L Jr. (1971) Food habits of the franciscana Pontoporia blainvillei (Cetacea: Platanistidae) from South America. Bulletin of Marine Science 21, 626–636.Google Scholar
Ford, J.K.B., Ellis, G.M. and Balcomb, K.C. (2000) Killer whales: the natural history and genealogy of Orcinus orca in the waters of British Columbia and Washington. 2nd edition. Vancouver: UBC Press.Google Scholar
Gao, A., Zhou, K. and Wang, Y. (1995) Geographical variation in morphology of bottlenose dolphins (Tursiops sp.) in Chinese waters. Aquatic Mammals 21, 121–135.Google Scholar
Goodall, N.R.P. and Schiavini, A.C.M. (1995) On the biology of the spectacled porpoise, Australophocaena dioptrica. Reports of the International Whaling Commission Special Issue 16, 411–453.Google Scholar
Heyning, J.E. and Perrin, W.F. (1994) Evidence for two species of common dolphins (genus Delphinus) from the eastern North Pacific. Contributions in Science, Natural History Museum of Los Angeles County 442, 1–35.Google Scholar
Higa, A., Hingst-Zaher, E. and De Vivo, M. (2002) Size and shape variability in the skull of Pontoporia blainvillei (Cetacea: Pontoporiidae) from Brazillian Coast. Latin American Journal of Aquatic Mammals Special Issue 1, 145–152.Google Scholar
Hohn, A.A., Read, R.J., Fernandez, S., Vidal, O. and Findley, L.T. (1996) Life history of the vaquita, Phocoena sinus (Phocoenidae, Cetacea). Journal of Zoology 239, 235–251.CrossRefGoogle Scholar
Jefferson, T.A. and Van Waerebeek, K. (2004) Geographic variation in skull morphology of humpback dolphins (Sousa spp.). Aquatic Mammals 30, 3–17.CrossRefGoogle Scholar
Kasuya, T. and Brownell, R.L. (1979) Age determination, reproduction and growth of the franciscana dolphin, Pontoporia blainvillei. Scientific Reports of the Whales Research Institute 31, 45–67.Google Scholar
Kasuya, T., Miyashita, T. and Kasamatsu, F. (1988) Segregation of two forms of short-finned pilot whales off the Pacific coast of Japan. Scientific Reports of the Whales Research Institute 39, 77–90.Google Scholar
Lázaro, M., Lessa, E.P. and Hamilton, H. (2004) Geographic genetic structure in the franciscana dolphin (Pontoporia blainvillei). Marine Mammal Science 20, 201–214.CrossRefGoogle Scholar
Malhotra, A. and Thorpe, R.S. (1997) Size and shape variation in a Lesser Antillean anole, Anolis oculatus (Sauria: Iguanidae) in relation to habitat. Biological Journal of the Linnean Society 60, 53–72.Google Scholar
Manly, B.F.J. (1994) Multivariate statistical methods: a primer. 3rd edition. London: Chapman & Hall.Google Scholar
Mendez, M., Rosembaum, H.C. and Bordino, P. (2007) Conservation genetics of the franciscana dolphin in Northern Argentina: population structure, by-catch impacts and management implications. Conservation Genetics 9, 419–435.CrossRefGoogle Scholar
Moritz, C. (1994) Defining evolutionarily ‘significant units’ for conservation. Trends in Evolutionary Ecology 9, 373–375.CrossRefGoogle ScholarPubMed
Norris, K.S. (1961) Standardized methods for measuring and recording data on the smaller cetaceans. Journal of Mammalogy 42, 471–476.CrossRefGoogle Scholar
Ott, P.H. (2002) Diversidade genética e estrutura populacional de duas espécies de cetáceos do Atlântico Sul Ocidental: Pontoporia blainvillei e Eubalaena australis. PhD thesis. Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.Google Scholar
Perrin, W.F. (1975) Variation and taxonomy of spotted and spinner porpoise (genus Stenella) in the eastern tropical Pacific and Hawaii. Bulletin of the Scripps Institution of Oceanography 21, 1–206.Google Scholar
Perrin, W.F., Akin, P.A. and Kashiwada, J.V. (1991) Geographic variation in external morphology of the spinner dolphin Stenella longirostris in the Eastern Pacific and implications for conservation. Fishery Bulletin 89, 411–428.Google Scholar
Perrin, W.F., Dolar, M.L.L. and Amano, M. (2003) Cranial sexual dimorphism and geographic variation in Fraser's dolphin, Lagenodelphis hosei. Marine Mammal Science 19, 484–501.CrossRefGoogle Scholar
Pinedo, M.C. (1991) Development and variation of the franciscana, Pontoporia blainvillei. PhD thesis. University of California, Santa Cruz, USA.Google Scholar
Pinedo, M.C. (1995) Development and variation in external morphology of the franciscana, Pontoporia blainvillei. Revista Brasileira de Biologia 55, 85–96.Google Scholar
Pough, F.H., Janis, C.M. and Heiser, J.B. (2005) Vertebrate life. 7th edition. New York: Prentice-Hall.Google Scholar
Ramos, R.M.A., Di Beneditto, A.P.M. and Lima, N.R.W. (2000) Growth parameters of Pontoporia blainvillei and Sotalia fluviatilis (Cetacea) in northern Rio de Janeiro, Brazil. Aquatic Mammals 26, 65–75.Google Scholar
Ramos, R.M.A., Di Beneditto, A.P.M., Siciliano, S., Santos, M.C.O., Zerbini, A.N., Bertozzi, C., Vicente, A.F.C., Zampirolli, E., Alvarenga, F.S. and Lima, N.R.W. (2002) Morphology of the franciscana (Pontoporia blainvillei) off Southeastern Brazil: sexual dimorphism, growth and geographic variation. Latin American Journal of Aquatic Mammals 1, 129–144.CrossRefGoogle Scholar
Read, A.J. and Tolley, K.A. (1997) Postnatal growth and allometry of harbour porpoises from the Bay of Fundy. Canadian Journal of Zoology 75, 122–130.CrossRefGoogle Scholar
R Development Core Team (2005) R: a language and environment for statistical computing. Vienna: R Foundation for Statistical Computing. ISBN 3-900051-07-0, URL: http://www.R-project.orgGoogle Scholar
Reyment, R.A., Blackith, R.E. and Campbell, N.A. (1984) Multivariate morphometrics. 2nd edition. London: Academic Press.Google Scholar
Rodriguez, D., Rivero, L. and Bastida, R. (2002) Feeding ecology of the franciscana (Pontoporia blainvillei) in marine and estuarine waters of Argentina. Latin American Journal of Aquatic Mammals Special Issue 1, 77–94.Google Scholar
Rosas, F.C.W. and Monteiro-Filho, E.L.A. (2002) Reproductive parameters of Pontoporia blainvillei (Cetacea, Pontoporiidae) on the coast of São Paulo and Paraná States, Brazil. Mammalia 66, 231–245.CrossRefGoogle Scholar
Ryder, O. A. (1986) Species conservation and systematics: the dilemma of subspecies. Trends in Ecology and Evolution 1, 9–10.CrossRefGoogle Scholar
Secchi, E.R., Danilewicz, D. and Ott, P.H. (2003) Applying the phylogeographic concept to identify franciscana dolphin stocks: implications to meet management objectives. Journal of Cetacean Research and Management 5, 61–68.CrossRefGoogle Scholar
Secchi, E.R., Wang, J.Y., Murray, B.W., Rocha-Campos, C.C. and White, B.N. (1998) Population differentiation in the franciscana (Pontoporia blainvillei) from two geographic locations in Brazil as determined from mitochondrial DNA control region sequences. Canadian Journal of Zoology 76, 622–627.CrossRefGoogle Scholar
Sergeant, D.E. (1962) On the external characters of the blackfish or pilot whales (genus Globicephala). Journal of Mammalogy 32, 395–413.CrossRefGoogle Scholar
Siciliano, S., Di Beneditto, A.P.M. and Ramos, R.M.A. (2002) A toninha, Pontoporia blainvillei (Mammalia, Cetacea, Pontoporiidae), nos estados do Rio de Janeiro e do Espírito Santo, costa sudeste do Brasil: caracterizações dos habitats e fatores de isolamento das populações. Boletim do Museu Nacional, Zoologia 47, 1–15.Google Scholar
Slooten, E. (1991) Age, growth, and reproduction in Hector's dolphins. Canadian Journal of Zoology 69, 1689–1700.CrossRefGoogle Scholar
Thorpe, R.S. (1983a) A review of the numerical methods for recognizing and analyzing racial differentiation. In Felsenstein, J. (ed.) Numerical taxonomy: Proceedings of a NATO Advanced Studies Institute. NATO ASI Series, pp. 404–423.CrossRefGoogle Scholar
Thorpe, R.S. (1983b) A biometric study on the effects of growth on the analyis of geographic variation: tooth number in green geckos (Reptilia: Phelsuma). Journal of Zoology 201, 13–26.CrossRefGoogle Scholar
Thorpe, R.S. (1988) Multiple group principal component analysis and population differentiation. Journal of Zoology 216, 37–40.CrossRefGoogle Scholar
Thorpe, R.S. and Leany, L. (1983) Morphometric studies in inbred and hybrid house mice (Mus sp): multivariate analysis of size and shape. Journal of Zoology 199, 421–432.CrossRefGoogle Scholar
Thorpe, R.S., Corti, M. and Capanna, E. (1982) Morphometric divergence of Robertsonian population/species of Mus: a multivariate analysis of size and shape. Experientia 38, 920–923.CrossRefGoogle Scholar
Wang, J.Y. (2002) Stock identity. In Perrin, W.F., Würsig, B. and Thewissem, J.G.M. (eds) Encyclopedia of marine mammals. San Diego, CA: Academic Press, pp. 1189–1192.Google Scholar
Wang, J.Y., Chou, L.S. and White, B.N. (1999) Mitochondrial DNA analysis of sympatric morphotypes of bottlenose dolphins (genus Tursiops) in Chinese waters. Molecular Ecology 8, 1603–1612.CrossRefGoogle ScholarPubMed
Wang, J.Y., Chou, L.S. and White, B.N. (2000a) Osteological differences between two sympatric forms of bottlenose dolphins (genus Tursiops) in Chinese waters. Journal of Zoology 252, 147–162.CrossRefGoogle Scholar
Wang, J.Y., Chou, L.S. and White, B.N. (2000b) Differences in the external morphology of two sympatric species of bottlenose dolphins (genus Tursiops) in the Waters of China. Journal of Mammalogy 81, 1157–1165.2.0.CO;2>CrossRefGoogle Scholar
Yonekura, M., Matsui, S. and Kasuya, T. (1980) On the external characters of Globicephala macrorhynchus off Taiji, Pacific coast of Japan. Scientific Reports of the Whales Research Institute 32, 67–95.Google Scholar