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Feeding habits of the franciscana dolphin (Pontoporia blainvillei) in south-eastern Brazil

Published online by Cambridge University Press:  27 February 2020

Laura Busin Campos Open the ORCID record for Laura Busin Campos [Opens in a new window] ,
Xênia Moreira Lopes ,
Ednilson da Silva  and
Marcos César de Oliveira Santos Open the ORCID record for Marcos César de Oliveira Santos [Opens in a new window]
Laura Busin Campos*
Affiliation:
Laboratório de Biologia da Conservação de Mamíferos Aquáticos, Departamento de Oceanografia biológica, Instituto Oceanográfico da Universidade de São Paulo (USP), Campus da Capital, Cidade Universitária, Butantã, São Paulo, SP, Brazil
Xênia Moreira Lopes
Affiliation:
Groningen Institute for Evolutionary Life Sciences, Faculty of Science and Engineering, University of Groningen, Nijenborgh 7, 9747 AG, Groningen, the Netherlands Laboratório de Biologia da Conservação de Cetáceos, Departamento de Zoologia, Instituto de Biociências da Universidade Estadual de São Paulo (UNESP), Campus de Rio Claro, SP, Brazil
Ednilson da Silva
Affiliation:
Laboratório de Biologia da Conservação de Mamíferos Aquáticos, Departamento de Oceanografia biológica, Instituto Oceanográfico da Universidade de São Paulo (USP), Campus da Capital, Cidade Universitária, Butantã, São Paulo, SP, Brazil
Marcos César de Oliveira Santos
Affiliation:
Laboratório de Biologia da Conservação de Mamíferos Aquáticos, Departamento de Oceanografia biológica, Instituto Oceanográfico da Universidade de São Paulo (USP), Campus da Capital, Cidade Universitária, Butantã, São Paulo, SP, Brazil
*
Author for correspondence: Laura Busin Campos, E-mail: laurabusincampos@gmail.com
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Abstract

This study evaluated the feeding habits of the franciscana dolphin (Pontoporia blainvillei) in south-eastern Brazil. Stomach contents were collected from a total of 145 dead specimens found incidentally caught by fishing vessels or stranded between 2005 and 2015. Fish otoliths, cephalopod beaks and whole non-digested prey were used for prey species identification. A total of 9337 prey items were identified, including 26 species of teleost fishes and three species of cephalopods. The most important prey families were Sciaenidae among fish and Loliginidae among cephalopods. Franciscana dolphins tended to feed on small fish (mean = 5.25 cm) and cephalopods (mean = 8.57 cm). The index of relative importance (IRI) showed that Pellona harroweri and Doryteuthis plei were the most important prey for both males and females. The PERMANOVA test confirmed that there is no significant difference between the feeding habits of different sexes, but detected a significant difference among seasons. Overall, our results show that franciscana dolphins are predominantly ichthyophagous and non-selective in relation to the type of prey, feeding on pelagic, demersal and pelagic-demersal prey.

Keywords

Feeding habitPontoporia blainvilleiSouth-western Atlanticstomach content analysis
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 100 , Issue 2 , March 2020 , pp. 301 - 313
Copyright
Copyright © Marine Biological Association of the United Kingdom 2020

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References

Almeida, LR and Branco, JO (2002) Aspectos biológicos de Stellifer stellifer (Bloch) na pesca artesanal do camarão sete-barbas, Armação do Itapocoroy, Penha, Santa Catarina, Brasil. Revista Brasileira de Zoologia 19, 601–610.CrossRefGoogle Scholar
Amundsen, PA, Gabler, HM and Staldvik, FJ (1996) A new approach to graphical analysis of feeding strategy from stomach contents data-modification of the Costello (1990) method. Journal of Fish Biology 48, 607–614.Google Scholar
Andrade-Tubino, MF, Ribeiro, ALR and Vianna, M (2008) Organização espaço-temporal das ictiocenoses demersais nos ecossistemas estuarinos brasileiros: uma síntese. Oecologia Brasiliensis 12, 640–661.Google Scholar
Ávila-da-Silva, AO, Carneiro, MC, Mendonça, JT, Bastos, GCC, Miranda, LV, Ribeiro, WR and Santos, S (2019) Produção pesqueira marinha e estuarina do Estado de São Paulo dezembro 2018. Informe Pesqueiro de São Paulo 104, 1–4.Google Scholar
Barros, NB and Clarke, MR (2009) Diet. In Perrin, WF, Würsig, B and Thewissen, JGM (eds), Encyclopedia of Marine Mammals, 2nd Edn.Amsterdam: Academic Press, pp. 311–316.CrossRefGoogle Scholar
Bastos, GC (1990) Morfologia de otólitos de algumas species de Peciformes (Teleostei) da costa Sudeste-Sul do Brasil (Master's dissertation). Universidade de São Paulo, São Paulo, Brazil.Google Scholar
Bittar, VT and Di Beneditto, APM (2009) Diet and potential feeding overlap between Trichiurus lepturus (Osteichthyes: Perciformes) and Pontoporia blainvillei (Mammalia: Cetacea) in northern Rio de Janeiro, Brazil. Zoologia 26, 374–378.CrossRefGoogle Scholar
Bordino, P, Siciliano, S, Bastida, R and Cremer, M (2002) Report of the working group on distribution and behavior. Latin American Journal of Aquatic Mammals (Special Issue 1), 21–23.Google Scholar
Budge, SM, Springer, AM, Iverson, SJ, Sheffield, G and Rosa, C (2008) Blubber fatty acid composition of bowhead whales, Balaena mysticetus: implications for diet assessment and ecosystem monitoring. Journal of Experimental Marine Biology and Ecology 359, 40–46.CrossRefGoogle Scholar
Calambokidis, J, Schorr, GS, Steiger, GH, Francis, J, Bakhtiari, M, Marshall, G, Olsen, EM, Gendron, D and Robertson, K (2007) Insights into the underwater diving, feeding, and calling behavior of blue whales from a suction-cup-attached video-imaging tag (crittercam). Marine Technology Society Journal 41, 19–29.CrossRefGoogle Scholar
Chaves, PTC and Vendel, AL (1997) Reprodução de Stellifer rastrifer (Jordan) (Teleostei, Sciaenidae) na Baía de Guaratuba, Paraná, Brasil. Revista Brasileira de Zoologia 14, 81–89.CrossRefGoogle Scholar
Clarke, MR (1986) Cephalopods in the diet of odontocetes. In Bryden, MM and Harrison, R (eds), Research on Dolphins. Oxford: Clarendon Press, pp. 281–321.Google Scholar
Coelho, JAP, Puzzi, A, Graça-Lopes, R, Rodrigues, ES and Prieto, O (1986) Análise da rejeição de peixes na pesca artesanal dirigida ao camarão sete-barbas (Xiphopenaeus kroyeri) no litoral do estado de São Paulo. Boletim do Instituto de Pesca 13, 51–61.Google Scholar
Committee on Taxonomy (2018) List of marine mammal species and subspecies. Society for Marine Mammalogy. Available at http://www.marinemammalscience.org (Accessed 6 August 2019).Google Scholar
Corrêa, MFM and Vianna, MS (1992/93) Catálogo de otólitos de Sciaenidae (Osteichthyes-Perciformes) do litoral do Estado do Paraná, Brasil. Nerítica 7, 13–41.Google Scholar
Costello, MJ (1990) Predator feeding strategy and prey importance: a new graphical analysis. Journal of Fish Biology 36, 261–263.CrossRefGoogle Scholar
Cousseau, MB and Perrota, RG (2000) Peces marinos de Argentina: biología, distribución, pesca, 2nd Edn.Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero.Google Scholar
Cremer, MJ, Pinheiro, PC and Simões-Lopes, PC (2012) Prey consumed by Guiana dolphin Sotalia guianensis (Cetacea, Delphinidae) and franciscana dolphin Pontoporia blainvillei (Cetacea, Pontoporiidae) in an estuarine environment in southern Brazil. Iheringia, Série Zoologia 102, 131–137.CrossRefGoogle Scholar
Crespo, EA (2009) Franciscana dolphin, Pontoporia blainvillei. In Perrin, WF, Würsig, B and Thewissen, JGM (eds), Encyclopedia of Marine Mammals, 2nd Edn.Amsterdam: Academic Press, pp. 466–469.CrossRefGoogle Scholar
Crespo, EA, Harris, G and González, R (1998) Group size and distributional range of the franciscana, Pontoporia blainvillei. Marine Mammal Science 14, 845–849.CrossRefGoogle Scholar
Danilewicz, D, Secchi, ER, Ott, PH, Moreno, IB, Bassoi, M and Borges-Martins, MB (2009) Habitat use patterns of franciscana dolphins (Pontoporia blainvillei) off southern Brazil in relation to water depth. Journal of the Marine Biological Association of the United Kingdom 89, 943–949.CrossRefGoogle Scholar
Denuncio, P, Paso-Viola, MN, Machovsky-Capsuka, GE, Raubenheimer, D, Blasina, G, Machado, R, Polizzi, P, Gerpe, M, Cappozzo, HL and Rodriguez, DH (2017) Population variance in prey, diets and their macronutrient composition in an endangered marine predator, the franciscana dolphin. Journal of Sea Research 129, 70–79.CrossRefGoogle Scholar
Di Beneditto, APM and Ramos, RMA (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.Google Scholar
Di Beneditto, APM, Rocha-Campos, CC, Danilewicz, D, Secchi, ER, Moreno, IB, Hassel, LB, Tavares, M, Ott, PH, Siciliano, S, Souza, SP and Alves, VC (2010) Plano de Ação Nacional para a Conservação do Pequeno Cetáceo Toninha: Pontoporia blainvillei. Brasília: Instituto Chico Mendes de Conservação da Biodiversidade, ICMBio. Série Espécies Ameaçadas. 76 pp.Google Scholar
Di Dario, F, Williams, JT, Nanola, C, Palla, H, Arceo, H, Acosta, AKM, Muallil, R, Aiken, KA, Grijalba Bendeck, L, Brown, J and Munroe, TA (2017) Pellona harroweri. In IUCN Red List of Threatened Species. Available at https://www.iucnredlist.org/species/16466332/86388759 (Accessed 11 August 2019).Google Scholar
Dunshea, G, Barros, NB, Berens McCabe, EJ, Gales, NJ, Hindell, MA, Jarman, SN and Wells, RS (2013) Stranded dolphin stomach contents represent the free-ranging population's diet. Biology Letters 9, 20121036.CrossRefGoogle ScholarPubMed
Fischer, LG, Pereira, LED and Vieira, JP (2011) Peixes estuarinos e costeiros, 2nd Edn.Rio Grande: Luciano Gomes Fischer.Google Scholar
Fitch, JE and Brownell, RL (1968) Fish otoliths in cetacean stomachs and their importance on interpreting feeding habits. Journal of the Fisheries Research Board of Canada 25, 1561–1574.CrossRefGoogle Scholar
Fitch, JE and Brownell, RL (1971) Food habits of the franciscana Pontoporia blainvillei (Cetacea: Platanistidae) from South America. Bulletin of Marine Science 21, 626–636.Google Scholar
Franco-Trecu, V, Drago, M, Costa, P, Dimitriadis, C and Passadore, C (2017) Trophic relationships in apex predators in an estuary system: a multiple-method approximation. Journal of Experimental Marine Biology and Ecology 486, 230–236.CrossRefGoogle Scholar
Gasalla, MA, Postuma, FA and Tomás, ARG (2005a) Captura de lulas (Mollusca: Cephalopoda) pela pesca industrial desembarcada em Santos: Comparação após 4 décadas. Brazilian Journal of Aquatic Science Technology 9, 5–8.CrossRefGoogle Scholar
Gasalla, MA, Perez, JAA, Marques, CA, Tomás, ARG, Aguiar, DC and Oliveira, UC (2005b) Loligo sanpaulensis. In Cergole, MC, Ávila-da-Silva, AO and Rossi-Wongtschowski, CLB (orgs), Análise das principais pescarias comerciais da região Sudeste-Sul do Brasil: dinâmica populacional das espécies em explotação. São Paulo: Instituto Oceanográfico-USP, Documents series REVIZEE: Score Sul, pp. 69–73.Google Scholar
Haimovici, M (1998) Present state and perspectives for the southern Brazil shelf demersal fisheries. Fisheries Management and Ecology 5, 277–289.CrossRefGoogle Scholar
Haimovici, M and Perez, JAA (1991) Coastal cephalopod fauna of southern Brazil. Bulletin of Marine Science 49, 221–230.Google Scholar
Henning, B, Carvalho, BS, Pires, MM, Bassoi, M, Marigo, J, Bertozzi, C and Araújo, MS (2018) Geographical and intrapopulation variation in the diet of a threatened marine predator, Pontoporia blainvillei (Cetacea). The Association for Tropical Biology and Conservation 50, 157–168.Google Scholar
Herman, DP, Burrows, DG, Wade, PR, Durban, JW, Matkin, CO, LeDuc, RG, Barrett-Lennard, LG and Krahn, MM (2005) Feeding ecology of eastern North Pacific killer whales Orcinus orca from fatty acid, stable isotope, and organochlorine analyses of blubber biopsies. Marine Ecology Progress Series 302, 275–291.CrossRefGoogle Scholar
Jereb, P and Roper, CFE (2010) Cephalopods of the world: An annotated and illustrated catalogue of cephalopod species known to date. Vol. 2. Myopsid and Oegopsid Squids. FAO Species Catalogue for Fishery Purposes. No. 4, Vol. 2.Google Scholar
Katona, S and Whitehead, H (1988) Are cetaceans ecologically important? Oceanography and Marine Biology, An Annual Review 26, 553–568.Google Scholar
Kimura, DK, Mandapat, RR and Oxford, SL (1979) Method, validity, and variability in the age determination of yellowtail rockfish (Sebastes flavidus), using otoliths. Journal of the Fisheries Research Board of Canada 36, 377–383.CrossRefGoogle Scholar
Lemos, PHB, Corrêa, MFM and Abilhôa, V (1992/93) Catálogo de otólitos de Gerreidae (Osteichthyes-Perciformes) do litoral do Estado do Paraná, Brasil. Nerítica 7, 109–117.Google Scholar
Lemos, PHB, Corrêa, MFM and Pinheiro, PC (1995a) Catálogo de otólitos de Engraulidae (Clupeiformes-Perciformes) do litoral do Estado do Paraná, Brasil. Brazilian Archives of Biology and Technology 38, 731–745.Google Scholar
Lemos, PHB, Corrêa, MFM and Pinheiro, PC (1995b) Catálogo de otólitos de Clupeidae (Clupeiformes-Perciformes) do litoral do Estado do Paraná, Brasil. Brazilian Archives of Biology and Technology 38, 747–759.Google Scholar
Magurran, AE (1988) Ecological Diversity and its Measurement. Princeton, NJ: Princeton University Press.CrossRefGoogle Scholar
Marçalo, A, Nicolau, L, Giménez, J, Ferreira, M, Santos, J, Araújo, H, Silva, A, Vingada, J and Pierce, GJ (2018) Feeding ecology of the common dolphin (Delphinus delphis) in Western Iberian waters: has the decline in sardine (Sardina pilchardus) affected dolphin diet? Marine Biology 165, 44.CrossRefGoogle Scholar
Marshall, HD, Hart, KA, Yaskowiak, ES, Stenson, GB, McKinnon, D and Perry, EA (2010) Molecular identification of prey in the stomach contents of harp seals (Pagophilus groenlandicus) using species-specific oligonucleotides. Molecular Ecology Resources 10, 181–189.CrossRefGoogle ScholarPubMed
Mendonça, JT (2015) Caracterização da pesca artesanal no litoral sul de São Paulo – Brasil. Boletim do Instituto de Pesca 41, 479–492.Google Scholar
Mendonça, JT and Miranda, LV (2008) Estatística pesqueira do litoral sul do estado de São Paulo: subsídios para gestão compartilhada. Pan-American Journal of Aquatic Sciences 3, 152–173.Google Scholar
Mendonça, JT, Pires, AD, Calasans, GC, Xavier, SC and Sena, RJ (2003) Produção pesqueira marinha do litoral sul do estado de São Paulo no período de 1967 a 1994. Série Relatórios Técnicos do Instituto de Pesca de São Paulo 13, 1–24.Google Scholar
Menezes, NA and Figueiredo, JL (1980) Manual de Peixes Marinhos Do Sudeste Do Brasil. IV: Teleostei (3). São Paulo: Museu de Zoologia.Google Scholar
Michener, RH and Kaufman, L (2007) Stable isotope ratios as tracers in marine food webs: an update. In Michener, RH and Lajtha, K (eds), Stable Isotopes in Ecology and Environmental Science, 2nd Edn.Malden, MA: Blackwell Publishing, pp. 283–282.CrossRefGoogle Scholar
Netto, FR and Di Beneditto, APM (2008) Interactions between fisheries and cetaceans in Espírito Santo State coast, southeastern Brazil. Revista Brasileria de Zoociências 10, 55–63.Google Scholar
Newsome, SD, Clementz, MT and Koch, PL (2010) Using stable isotope biogeochemistry to study marine mammal ecology. Marine Mammal Science 26, 509–572.Google Scholar
Ott, PH, Secchi, ER, Moreno, IB, Danilewicz, D, Crespo, EA, Bordino, P, Ramos, R, Di Beneditto, AP, Bertozzi, C, Bastida, R, Zanelatto, R, Perez, J and Kinas, PG (2002) Report of the working group on fishery interactions. Latin American Journal of Aquatic Mammals (Special Issue 1), 55–64.Google Scholar
Parks, SE, Cusano, DA, Stimpert, AK, Weinrich, MT, Friedlaender, AS and Wiley, DN (2014) Evidence for acoustic communication among bottom foraging humpback whales. Scientific Reports 4, 7508.CrossRefGoogle ScholarPubMed
Paso-Viola, MN, Denuncio, P, Negri, MF, Rodríguez, D, Batista, R and Cappozzo, HL (2014) Diet composition of franciscana dolphin Pontoporia blainvillei from southern Buenos Aires, Argentina and its interaction with fisheries. Revista de Biología Marina y Oceanografía 49, 393–400.CrossRefGoogle Scholar
Pinedo, MC, Praderi, R and Brownell, RL (1989) Review of the biology and status of the franciscana Pontoporia blainvillei. In Perrin, WF, Brownell, RL, Kaiya, Z and Jiankang, L (eds), Biology and Conservation of the River Dolphins. Occasional Papers of the IUCN, Species Survival Commission 3. Gland: IUCN, pp. 46–51.Google Scholar
Pinkas, L, Oliphant, MS and Iverson, ILK (1971) Food habits of albacore, bluefin tuna and bonito in California waters. Fishery Bulletin 152, 1–105.Google Scholar
R Core Team (2018) R: A Language and Environment for Statistical Computing. Vienna: R Foundation for Statistical Computing.Google Scholar
Rodrigues, AR and Gasalla, MA (2008) Spatial and temporal patterns in size and maturation of Loligo plei and Loligo sanpaulensis (Cephalopoda: Loliginidae) in southeastern Brazilian waters, between 23°S and 27°S. Scientia Marina 72, 631–643.CrossRefGoogle 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
Roman, J, Estes, JA, Morissette, L, Smith, C, Costa, D, McCarthy, J, Nation, JB, Nicol, S, Pershing, A and Smetacek, V (2014) Whales as marine ecosystem engineers. Frontiers in Ecology and the Environment 12, 377–385.CrossRefGoogle Scholar
Roper, CFE, Sweeny, MJ and Nauen, CE (1984) FAO Species catalogue. Cephalopods of the world: an annotated and illustrated catalogue of species of interest to fisheries. FAO Fisheries Synopsis. No. 125, Vol. 3.Google Scholar
Rosas, FCW, Monteiro Filho, ELA and Oliveira, MR (2002) Incidental catches of franciscana (Pontoporia blainvillei) on the Southern coast of São Paulo State and coast of Paraná State, Brazil. Latin American Journal of Aquatic Mammals (Special Issue 1), 161–168.Google Scholar
Rossi-Wongtschowski, CLDB, Siliprandi, CC, Brenha, MR, Gonsales, SA, Santificetur, C and Vaz-dos-Santos, AM (2014) Atlas of marine bony fish otoliths (Sagittae) of southeastern-southern Brazil. Part I: Gadiformes (Macrouridae, Moridae, Bregmacerotidae, Phycidae and Merlucciidae); Part II: Perciformes (Carangidae, Sciaenidae, Scombridae and Serranidae). Brazilian Journal of Oceanography (Special Issue 62), 1–103.CrossRefGoogle Scholar
Santificetur, C, Conversani, VRM, Brenha-Nunes, MR, Giaretta, MB, Siliprandi, CC and Rossi-Wongtschowski, CLDB (2017) Atlas of marine bony fish otoliths (sagittae) of Southeastern-Southern Brazil. Part V: Perciformes (Sparidae, Sciaenidae, Polynemidae, Mullidae, Kyphosidae, Chaetodontidae, Mugilidae, Scaridae, Percophidae, Pinguipedidae, Blenniidae, Gobiidae, Ephippidae, Sphyraenidae, Gempylidae, Trichiuridae, Scombridae, Ariommatidae, Stromateidae and Caproidae). Brazilian Journal of Oceanography 65, 201–257.CrossRefGoogle Scholar
Santos, RA and Haimovici, M (2001) Cephalopods in the diet of marine mammals stranded or incidentally caught along southeastern and southern Brazil. Fisheries Research 52, 99–112.CrossRefGoogle Scholar
Santos, MCO, Oshima, JEF and Silva, E (2009) Sightings of franciscana dolphins (Pontoporia blainvillei): the discovery of a population in the Paranaguá Estuarine Complex. Brazilian Journal of Oceanography 57, 57–63.CrossRefGoogle Scholar
Santos, LO, Cattani, AP and Spach, HL (2016) Ictiofauna acompanhante da pesca de arrasto para embarcações acima de 45 HP no litoral do Paraná, Brasil. Boletim Instituto de Pesca 42, 816–830.CrossRefGoogle Scholar
São Paulo (State) Decree N. 53.526 (2008) Cria a Área de Proteção Ambiental Marinha do Litoral Sul e a Área de Relevante Interesse Ecológico do Guará, e dá providências correlatas. Casa Civil.Google Scholar
Secchi, ER, Ott, PH and Danilewicz, D (2003) Effects of fishing by-catch and the conservation status of the franciscana dolphin, Pontoporia blainvillei. In Gales, N, Hindell, M and Kirkwood, R (eds), Marine Mammals: Fisheries, Tourism and Management Issues. Collingwood: CSIRO Publishing, pp. 174–191.Google Scholar
Siciliano, S (1994) Review of small cetaceans and fishery interactions in coastal waters of Brazil. Report International Whaling Commission 15, 241–250.Google Scholar
Siciliano, S, Di Beneditto, APM and Ramos, RMA (2002) A toninha, Pontoporia blainvillei (Gervais & d´Orbigny, 1844) (Mammalia, Cetacea. Pontoporiidae), nos estados do Rio de Janeiro e Espírito Santo, costa sudeste do Brasil: caracterização dos hábitats e fatores de isolamento das populações. Boletim do Museu Nacional – Zoologia 476, 1–15.Google Scholar
Siliprandi, CC, Brenha-Nunes, MR, Rossi-Wongtschowski, CLDB, Santificetur, C and Conversani, VRM (2016) Atlas of marine bony fish otoliths (sagittae) of Southeastern-Southern Brazil. Part III: Clupeiformes (Clupeidae, Engraulidae, Pristigasteridae). Brazilian Journal of Oceanography (Special Issue 62), 1–22.CrossRefGoogle Scholar
Souza, LM and Chaves, PT (2007) Atividade reprodutiva de peixes (Teleostei) e o defeso da pesca de arrasto no litoral norte de Santa Catarina, Brasil. Revista Brasileira de Zoologia 24, 1113–1121.CrossRefGoogle Scholar
Tellechea, JS, Perez, W, Olsson, D, Lima, M and Norbis, W (2017) Feeding habits of franciscana dolphins (Pontoporia blainvillei): echolocation or passive listening? Aquatic Mammals 43, 440–448.CrossRefGoogle Scholar
Vaske-Júnior, T (2006) Guia de identificação de cefalópodes costeiros e oceânicos do Atlântico sudoeste equatorial através das mandíbulas (bicos). Olinda: Livro rápido.Google Scholar
Wells, RS, Bordino, P and Douglas, DC (2013) Patterns of social association in the franciscana, Pontoporia blainvillei. Marine Mammal Science 29, 520–528.Google Scholar
Zerbini, AN, Secchi, ER, Crespo, EA, Danilewicz, D and Reeves, RR (2017) Pontoporia blainvillei. In IUCN Red List of Threatened Species. Version 2017.3. Available at https://www.iucnredlist.org/species/17978/123792204 (Accessed 22 January 2019).Google Scholar
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