Analysis of Brazilian fishers' classifications of 24 marine (Atlantic coast) and 24 freshwater (Amazon) fish species reveals that fishers from the Atlantic coast identify fish mainly through generic names (primary lexemes), while riverine Amazonian fishers typically identify them through binomials. The similarity of Amazonian fish species seems to contribute to the detailed folk taxonomy used by riverine fishers. High-ranking groups called "relatives" or "cousins" are sorted by fishers in terms of similarities of habitat, diet, and morphology and, secondarily, behavior. The general correspondence between the folk and scientific taxonomies reinforces the reality of both the supracategories used by these fishers and the biological groups as discontinuities in nature. Given the urgency of biological inventories and the lack of knowledge of high-biodiversity environments such as the Atlantic Forest and the Amazon, these results suggest that fisher knowledge and experience could contribute to scientific research. © 2008 by The Wenner-Gren Foundation for Anthropological Research. All rights reserved.492291306Agosti, D., Biodiversity data are out of local taxonomists' reach (2006) Nature, 439, p. 392Atran, S., Itzaj Maya folkbiological taxonomy: Cognitive universals and cultural particulars (1999) Folkbiology, pp. 119-203. , ed. D. Medin and S. Atran, Cambridge: MIT PressBegossi, A. 1989. Food diversity and choice, and technology in a Brazilian fishing community (Búzios Island, São Paulo State). Ph.D. diss., University of California, DavisAtran, S., Fishing activities and strategies at Búzios Island (1996) Fisheries resource utilization and policy: Proceedings of the World Fisheries Congress 2, pp. 125-141. , ed. R. M. Meyer, C. Zhang, M. L. Windsor, B. McCay, L. J. Hushak, and R. M. Muth, New Delhi: Oxford and IBHAtran, S., Resilience and neo-traditional populations: The caiçaras (Atlantic Forest) and caboclos (Amazon, Brazil) (1998) Linking social and ecological systems: Management practices and social mechanisms for building resilience, pp. 129-157. , ed. C. Folke and F. Berkes, Cambridge: Cambridge University PressBegossi, A., Figueiredo, J.L., Ethnoicthyology of southern coastal fishermen: Cases from Búzios Island and Sepetiba Bay (Brazil) (1995) Bulletin of Marine Science, 56, pp. 682-689Begossi, A., Garavello, J.C., Notes on ethnoichthyology of fisherman from the Tocantins River (1990) Acta Amazônica, 20, pp. 341-352Begossi, A., Leme, A., Seixas, C.S., de Castro, F., Pezzuti, J., Hanazaki, N., Peroni, N., Silvano, R.A.M., (2004) Ecologia de pescadores da Mata Atlântica e da Amazônia, , São Paulo: HucitecBegossi, A., Richerson, P.J., Biodiversity, family income and ecological niche: A study on the consumption of food animals at Búzios Island (1993) Ecology of Food and Nutrition, 30, pp. 51-61Begossi, A., Silvano, R.A.M., Ramos, R.M., Foraging behavior among fishermen from the Negro and Piracicaba rivers, Brazil: Implications for management (2005) River basin management, pp. 503-513. , ed. C. A. Brebbia and J. A. Carmo, Southampton: WIT PressBerkes, F., Mahon, R., McConney, P., Pollnac, R., Pomeroy, R., (2000) Managing small-scale fisheries, , http://www.idrc.ca, Ottawa: International Development Research CentreBerlin, B., Folk systematics in relation to biological classification and nomenclature (1973) Annual Review of Ecology and Systematics, 4, pp. 259-271Berlin, B., (1992) Ethnobiological classification, , Princeton: Princeton University PressBernardes, R.A., Figueiredo, J.L., Rodrigues, A.R., Fischer, L.G., Vooren, C.M., Haimovici, M., Rossi-Wongtschowski, C.L.D.B., (2005) Peixes da zona econômica exclusiva da região sudeste-sul do Brasil: Levantamento com armadilhas, pargueiras e rede de arrasto de fundo, , São Paulo: Editora da Universidade de São PauloBock, W.J., Species: The concept, category and taxon (2004) Journal of Zoological Systematics and Evolutionary Research, 42, pp. 178-190Brown, C., (1984) Language and living things, , New Brunswick: Rutgers University PressCabalzar, A., Lima, F.T., Lopes, M.C., (2005) Peixe e gente no Alto Rio Tiquié: Conhecimentos Tukano e Tuyuka, ictiologia, etnologia, , São Paulo: Instituto SocioambientalCamargo, E., Begossi, A., (2006) Os diários de campo da Ilha dos Búzios, , São Paulo: HucitecClauzet, M., Ramires, M., Barrella, W., Pesca artesanal e conhecimento local de duas populações caiçaras no litoral de São Paulo, Brazil (2005) MultiCiência, p. 4. , http://www.multiciencia.unicamp.br/rede_1_4.htmCoyne, J.A., Orr, H.A., (2004) Speciation, , Sunderland, Mass, Sinauer AssociatesDarwin, C. 1859a [1982]. The origin of species. Abridged and introduced by R. E. Leakey. New York: McGraw-Hill_. 1859b. Origem das espécies. Transl. by Joaquim dá Mesquita Paúl. Oporto: Lello and IrmãoDiamond, J., Bishop, K.D., Ethno-ornithology of the Ketengban people, Indonesian New Guinea (1999) Folkbiology, pp. 18-25. , ed. D. Medin and S. Atran, Cambridge: MIT PressEreshefsky, M., (2001) The poverty of Linnaean hierarchy: A philosophical study of biological taxonomy, , Cambridge: Cambridge University PressFigueiredo, J.L., (1981) Estudo das distribuições endêmicas de peixes da Província Zoogeográfica Marinha Argentina, , Ph.D. thesis, Universidade de São PauloFigueiredo, J.L., Santos, A.P., Yamaguti, N., Bernardes, R.A., Rossi-Wongtschowski, C.L.D.B., (2002) Peixes da zona exclusiva da região sudeste-sul do Brasil: Levantamento com rede de meia água, , São Paulo: Editora da Universidade de São Paulo(2005), http://www.fishbase.org, Froese, R, and D. Pauly, edsGhiselin, M.T., Natural kinds and supraorganismal individuals (1999) Folkbiology, pp. 447-460. , ed. D. Medin and S. Atran, Cambridge: MIT PressGoren, M., Dor, M., (1994) An updated checklist of the fishes of the Red Sea (CLOFRES II), , Jerusalem: Israel Academy of Sciences and HumanitiesGoulding, M., Carvalho, M.L., Ferreira, E.G., (1988) Rio Negro, rich life in poor water, , The Hague: SPB AcademicHunn, E., The utilitarian factor in folk biological classification (1982) American Anthropologist, 84, pp. 830-847Hunn, E., Size as limiting the recognition of biodiversity in folkbiological classifications: One of four factors governing the cultural recognition of biological taxa (1999) Folkbiology, pp. 47-69. , ed. D. Medin and S. Atran, Cambridge: MIT PressMarques, J.G.W., (1991) Aspectos ecológicos na ecologia dos pescadores do complexo estuarino-lagunar de Mundaú-Manguaba, Alagoas, , Ph.D. thesis, Universidade Estadual de CampinasMayr, E., (1969) Principles of systematic zoology, , New York: McGraw-HillMayr, E., (2004) What makes biology unique, , Cambridge: Cambridge University Press(1999) Folkbiology, , Medin, D, and S. Atran, eds, Cambridge: MIT PressMenezes, N.A., Buckup, P.A., Figueiredo, J.L., Moura, R.L., (2003) Catálogo das espécies de peixes marinhos do Brasil, , São Paulo: Universidade de São PauloMorán, E.F., The adaptive system of the Amazonian caboclo (1974) Man in the Amazon, pp. 139-159. , ed. C. Wagley, Bloomington: Indiana University PressMourão, J.S., Nordi, N., Principais critérios utilizados por pescadores artesanais na taxonomia folk dos peixes do estuário do rio Mamanguape, Paraíba, Brazil (2002) Interciê ncia, 7, pp. 664-668Paz, V., Begossi, A., Ethnoicthyology of Gamboa fishermen (Sepetiba Bay, Rio de Janeiro state) (1996) Journal of Ethnobiology, 16, pp. 157-168Ramires de Souza, M., Barrella, W., Etnoictiologia dos pescadores artesanais da EE Juréia Itatins (São Paulo, Brazil) (2004) Enciclopédia caiçara, 1, pp. 117-161. , ed. A. C. Diegues, São Paulo: HucitecSáenz-Arroyo, A., Roberts, C.M., Torre, J., Cariño-Olvera, M., Using fishers' anecdotes, naturalists' observations and grey literature to reassess marine species risk: The case of the Gulf grouper and the Gulf of California, Mexico (2005) Fish and Fisheries, 6, pp. 121-133Seixas, C., Begossi, A., Ethnozoology of caiçaras from Aventureiro, Ilha Grande (2001) Journal of Ethnobiology, 21, pp. 107-135Silva, A.L., Begossi, A., Uso de recursos por ribeirinhos no médio Rio Negro (2004) Ecologia de pescadores, pp. 89-148. , ed. A. Begossi, São Paulo: HucitecSilvano, R. A. M. 2001. Etnoecologia e história natural de peixes no Atlântico (Ilha do Búzios, Brazil) e Pacífico (Moreton Bay, Austrália). Ph.D. thesis, Universidade Estadual de CampinasSilva, A.L., Begossi, A., Pesca artesanal e etnoiciologia (2004) Ecologia de pescadores, pp. 187-222. , ed. A. Begossi, São Paulo: HucitecSilvano, R.A.M., Begossi, A., Ethnoicthyology and fish conservation in the Piracicaba River, Brazil (2002) Journal of Ethnobiology, 22, pp. 285-306Silvano, R.A.M., Begossi, A., Local knowledge on a cosmopolitan fish: Ethnoecology of Pomatomus saltatrix (Pomatomidae) in Brazil and Australia (2005) Fisheries Research, 71, pp. 43-59Silvano, R.A.M., Oyakawa, O., Amaral, B., Begossi, A., (2001) Peixes do Alto Juruá, , São Paulo: Editora da Universidade de São PauloValbo-Jorgensen, J., Poulsen, A.F., Using local knowledge as a research tool in the study of river fish biology: Experiences from the Mekong (2000) Environment, Development and Sustainability, 2, pp. 253-276Wheeler, Q.D., Meier, R., (2000) Species concept and phylogenetic theory, , New York: Columbia University PressWheeler, Q.D., Raven, P.H., Wilson, E.O., Taxonomy: Impediment or expedient? (2004) Science, 303, p. 285Wilson, D.C., Nielsen, R., Degnbol, P., The fisheries co-management experience: Accomplishments, challenges, and prospects (2003) Fish and Fisheries Series, 26. , Dordrecht: Kluwer