21 results on '"Cetra M"'
Search Results
2. Highβ-diversity maintains regional diversity in Brazilian tropical coastal stream fish assemblages
- Author
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Teshima, F. A., primary, Mello, B. J. G., additional, Ferreira, F. C., additional, and Cetra, M., additional
- Published
- 2016
- Full Text
- View/download PDF
3. Fish-assemblage structure of the Corumbatai river basin, São Paulo State, Brazil: characterization and anthropogenic disturbances
- Author
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Cetra, M. and Petrete Jr., M.
- Subjects
Corumbataí river ,species diversity ,rio Corumbataí ,assembléia de peixes ,fragmentação de hábitats ,diversidade de espécies ,habitat fragmentation ,Paraná river basin ,fish assemblage ,bacia do rio Paraná - Abstract
The Corumbataí river is one of the main tributaries of the right margin of the Piracicaba river, itself a tributary of Tietê river. The Corumbataí is part of the Paraná river basin and is regionally important not only because of its good-quality water but also because the local landscape has unique features. This study aimed to characterize the fish assemblage of the Corumbataí in order to provide background data for evaluating its environmental status. For this purpose, within the Corumbatai river basin 4 of the main rivers were chosen, along which 3 sampling points each were established. Twenty-four samplings were carried out during March-July and September-December 2001. Diversity measures were used to evaluate biotic data. A linear ANCOVA model was used to test the hypothesis of a spatio-temporal variation in the fish assemblage, with species richness as the response variable, river order as the factor, and temperature and the natural logarithm of number of individuals as covariates. This analysis showed a spatio-temporal variation in agreement with various concepts, e.g., the specie-area relationship and the river continuum, which have been exhaustively discussed in the literature. When compared to those of the other rivers, data from the Ribeirão Claro river showed a different pattern, probably due to human interference, and exemplifying aquatic habitat fragmentation that might have led to isolation of local fish populations. O rio Corumbataí é um dos principais tributários da margem direita do rio Piracicaba que é um tributário do rio Tietê. O rio Corumbataí integra a bacia do rio Paraná e é regionalmente importante não só por possuir águas de boa qualidade, mas também por possuir elementos raros na paisagem local. Este estudo visou caracterizar as assembléias de peixes do rio Corumbataí e fornecer dados que contribuam para uma avaliação da sua qualidade ambiental. Na bacia do rio Corumbataí, foram amostrados 4 rios principais, cada um com 3 pontos de coleta. Vinte e quatro amostras foram coletadas durante os meses de março a julho e de setembro a dezembro de 2001. Dados bióticos foram avaliados por medidas de diversidade. Um modelo linear ANCOVA foi utilizado para testar a hipótese de variação espaço-temporal nas assembléias de peixes, com a riqueza de espécies como variável resposta, ordem do rio como fator e temperatura e logaritmo natural do número de indivíduos como covariáveis. Esta análise mostrou uma variação espaço-temporal que é corroborada por conceitos exaustivamente discutidos na literatura, tais como relação espécie-área e o conceito de rio contínuo. Dados provenientes do rio Ribeirão Claro mostraram um padrão diferente quando comparados com os outros rios. Esta diferença foi provavelmente devido à interferência humana e atesta o processo de fragmentação de hábitats aquáticos que podem ter levado a um isolamento das populações locais de peixes.
- Published
- 2006
4. High β-diversity maintains regional diversity in Brazilian tropical coastal stream fish assemblages.
- Author
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Teshima, F. A., Mello, B. J. G., Ferreira, F. C., and Cetra, M.
- Subjects
FISH diversity ,FISH conservation ,ECOSYSTEM management ,FRESHWATER fishes ,RIPARIAN plants - Abstract
Understanding spatial patterns of species diversity and the variables that structure biological communities is critical to successful ecosystem management. Regional diversity ( γ) can be considered a combination of local diversity ( α) and among sites variation ( β). Using abundance data of fish species in 19 stream stretches, an analysis of diversity partitioning was used to determine the contribution of α- and β-diversity to γ-diversity. Redundancy analysis was applied to find the contribution of environmental variables and spatial configuration to species composition. Intersite variation contributed significantly to γ-diversity. Spatial configuration and instream heterogeneity (coarse substrate, channel width, water velocity and shading) and riparian vegetation were related to local fish abundances. Conservation actions should consider that all streams are important, and prioritisation of just a small number of the richest sites is not appropriate. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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5. Seasonal and annual cycles in marine small-scale fisheries (Ilhéus - Brazil)
- Author
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Cetra, M., primary and Petrere, M., additional
- Published
- 2014
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6. Population density, growth and reproduction of arapaima in an Amazonian river-floodplain
- Author
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Arantes, C. C., primary, Castello, L., additional, Stewart, D. J., additional, Cetra, M., additional, and Queiroz, H. L., additional
- Published
- 2010
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7. Social behaviour of collared peccaries (Pecari tajacu) under three space allowances
- Author
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da C Nogueira, SS, primary, Silva, MG, additional, dos S Dias, CT, additional, Pompéia, S, additional, Cetra, M, additional, and Nogueira-Filho, SLG, additional
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- 2010
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8. Associations between fish assemblage and riparian vegetation in the Corumbataí River Basin (SP)
- Author
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Cetra, M., primary and Petrere JR., M., additional
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- 2007
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9. Fish-assemblage structure of the Corumbatai river basin, São Paulo State, Brazil: characterization and anthropogenic disturbances
- Author
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Cetra, M., primary and Petrete Jr., M., additional
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- 2006
- Full Text
- View/download PDF
10. Small‐scale fisheries in the middle River Tocantins, Imperatriz (MA), Brazil
- Author
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Cetra, M., primary and Petrere Jr, M., additional
- Published
- 2001
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11. Social behaviour of collared peccaries (Pecari tajacu) under three space allowances.
- Author
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Nogueira, S. S. da C., Silva, M. G., Dias, C. T. dos S., Pompéia, S., Cetra, M., and Nogueira-Filho, S. L. G.
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ANIMAL social behavior ,PECCARIES ,AGONISTIC behavior in animals ,ANIMAL feeding ,ANIMAL welfare ,ANIMAL housing ,BEHAVIOR - Abstract
The article discusses a study which evaluated the effects of space allowance on the social behavior of farmed collared peccaries. A statistical model was developed to compare the agonistic behaviour of collared peccaries during pre-feeding and feeding periods. The study suggests that animal welfare can be improved by adopting at least a space allowance of 187.5 square meters per peccary. It also confirmed the importance of shelter areas in raising collared peccaries.
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- 2010
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12. Social behaviour of collared peccaries (Pecari tajacu) under three space allowances
- Author
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Nogueira, S. S. Da C., Silva, M. G., Dias, C. T. Dos S., Sabine Pompeia, Cetra, M., and Nogueira-Filho, S. L. G.
13. Commento all'art. 2415 c.c
- Author
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PISANI, Luca, A. Abu Awwad, G. Acerbi, D. Arcidiacono, F. Barachini, E. Barcellona, A. Bartalena, M. Bazzani, P. Beltrami, P. Benazzo, M. Benedettelli, F. Bordiga, F. Briolini, G. M. Buta, L. Calvosa, M. Campobasso, P. Caputo, V. Cariello, C. Caruso, M. Centonze, F. Centonze, S. Cerrato, A. Cetra, M. Cian, P. Cuomo, F. D' Alessandro, A. Dacco', N. De Luca, V. De Stasio, A. Dell' Osso , I. Demuro, C. Desogus, M. C. Di Martino, A. Dolmetta, T. Epidendio, P. Fabbio, M. Ferrante, G. Ferri, C. Frigeni, M. Gargantini, A. Genovese, P. Ghionni Crivelli Visconti, G. Giannelli, E. Ginevra, P. Giudici, F. Guerrera, C. M. Ibba, G. Iermano, I. Kutufa', G. P. La Sala, M. Lamandini, D. Latella, R. Lener, P. Lucarelli, A. Luciano, E. Macri', M. Maltoni, F. Mancuso, V. Manes, P. Marano, M. Maugeri, V. Meli, U. Minneci, A. Mirone, P. F. Mondini, M. Mozzarelli, G. P. Mucciarelli, M. Notari, G. Nuzzo, G. Olivieri, G. Palmieri, S. Patriarca, C. Patriarca, R. Pennisi, M. Perrino, L. Picardi, V. Pinto, L. Pisani, P. Piscitello, M. B. Portale, G. Portale, C. Presciani, G. M. Giovanni Presti, L. Purpura, D. Regoli , M. Rescigno, G. A. Rescio, A. Romano, M. Rubino De Ritis, L. Salamone , P. Sanfilippo, R. Santagata De Castro G. Santoni, A. D. Scano, L. Schiuma A. Sciarrone Alibrandi, M. Sciuto, P. D. Sfameni, M. Speranzin, P. Spolaore, M. S. Spolidoro, L. Stanghellini, M. Stella Richter, G. Strampelli, P. Tarantino, C. Tedeschi, A. Tina, U. Tombari, A. Tucci, S. Turelli, A. Valzer, S. Vanoni, A. Vicari, R. Viggiani., P. Abbadessa, G.B. Portale, M. Campobasso, V. Cariello, U. Tombari, and Pisani, Luca
- Published
- 2016
14. La società in nome collettivo
- Author
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PISANI, Luca, Cetra, Cian, Daccò, De Acutis, Ginevra, Mirone, Pisani, Sanfilippo, Santagata, Sarti, Sciuto, CIAN MARCO, Pisani, Luca, A. Cetra, M. Cian, A. Daccò, M. De Acutis, E. Ginevra, A. Mirone, L. Pisani, P.M. Sanfilippo, R. Santagata, D. Sarti, A. Sciarrone Alibrandi, M. Sciuto, M. Cian, and Pisani, L.
- Subjects
società di persone ,società in nome collettivo - Abstract
Il capitolo tratta diffusamente della disciplina della società in nome collettivo
- Published
- 2014
15. La società in accomandita semplice. La società semplice
- Author
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l. pisani, Cetra, Cian, Daccò, De Acutis, Ginevra, Mirone, Pisani, Sanfilippo, Santagata, Sarti, Sciuto, CIAN MARCO, Pisani, Luca, A. Cetra, M. Cian, A. Daccò, M. De Acutis, E. Ginevra, A. Mirone, L. Pisani, P.M. Sanfilippo, R. Santagata, D. Sarti, A. Sciarrone Alibrandi, M. Sciuto, M. Cian, and Pisani, L.
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società di persone ,società in accomandita semplice ,società semplice - Abstract
Il capitolo tratta diffusamente della disciplina della società in accomandita semplice e della società semplice
- Published
- 2013
16. Freshwater fish scale database.
- Author
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Bánó B, Bolotovskiy A, Levin B, Mattox GMT, Cetra M, Czeglédi I, and Takács P
- Abstract
Scales of the ray finned fishes can be used for multiple purposes. Beside others by their specific structure and elemental composition they are usable for age determination and food-web researches. Additionally, just their presence, absence, shape, location, or numbers could provide a reliable taxonomic information. The fish scales show remarkable size variation also, which characteristics provide reliable information about the environmental needs of freshwater fish. But till now this information was not interpretable and comparable in the absence of a sufficiently large and detailed database. In this study we provide a database which can facilitate the further complex comparative studies. Our dataset consists of 2954 scale photos characterising 193 freshwater fish species. All photos have a uniquely identification code showing exactly which species the scale belongs to. In addition to the photos, our database includes a table showing the exact taxonomic classification of the studied species, the average body profile-index, and the relative scale size, as well as the ecological (flow and feeding habitat preferences) and life strategic characteristics (feeding and breeding guild memberships) of each species. The sampled species have diverse origin, covering five biogeographical regions. An average of five adults from each species were selected for sampling. Three-to-four scales were collected from the anterior part of the body between the dorsal fin and the lateral line. The removed scales were cleaned and prepared to microscope slides, and after this process they were photographed or scanned. Our database can be used for both research and educational purposes. A large number of scale photos assigned of species can be an opportunity to create an automatic species identification system. Moreover, the subjectivity in morphometric measurements can be eliminated by analysing the database with artificial intelligence., (© 2024 The Authors.)
- Published
- 2024
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17. Factors affecting the transferability of bioindicators based on stream fish assemblages.
- Author
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Sousa V, Dala-Corte RB, Benedito E, Brejão GL, Carvalho FR, Casatti L, Cetra M, Pompeu PS, Súarez YR, Tejerina-Garro FL, Borges PP, and Teresa FB
- Subjects
- Animals, Environmental Monitoring methods, Ecosystem, Fishes, Environmental Biomarkers, Rivers
- Abstract
The development of multimetric indices (MMIs) to measure the biotic condition of aquatic habitats is based on metrics derived from biological assemblages. Considering fish assemblages, the inconsistencies in metrics responses outside of the places where they were developed limit MMI transferability and applicability to other locations, requiring local calibration. The factors behind the low transferability of these MMIs are still poorly understood. We investigated how environmental dissimilarity and spatial distance influence the transferability of metrics generated from local stream fish assemblages to other regions. We also tested whether functional and taxonomic metrics respond differently to the spatial distance. We used data from 239 fish assemblages from streams distributed across a Brazilian, the upper Parana basin and characterized each site according to the level of anthropogenic disturbance at the landscape scale using an Anthropogenic Pressure Index (API). We divided the upper Parana basin into sub-basins and used two of them to create template response models of the metrics in relation to the API. We used these response models to predict the responses outside the template sub-basins. Our response variable representing a metric of transferability was the absolute difference between metric's predicted and observed value for each site (prediction error). We thus modeled the prediction error in relation to the predictor variables that were i) the environmental dissimilarity between each site with the average of the sites from template sub-basins (climatic, topographic and soil type variables) and ii) the spatial distance (overland and watercourse distance) between each site and the center of the template sub-basin. We found that errors in metric predictions were associated with both environmental dissimilarity and spatial distance. Furthermore, functional and taxonomic metrics responded equally to spatial distance. These results indicate the need for local calibration of metrics when developing MMIs, especially if the protocols already available come from distant and environmentally dissimilar places., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023. Published by Elsevier B.V.)
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- 2023
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18. NEOTROPICAL FRESHWATER FISHES: A dataset of occurrence and abundance of freshwater fishes in the Neotropics.
- Author
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Tonella LH, Ruaro R, Daga VS, Garcia DAZ, Vitorino OB Júnior, Lobato-de Magalhães T, Dos Reis RE, Di Dario F, Petry AC, Mincarone MM, de Assis Montag LF, Pompeu PS, Teixeira AAM, Carmassi AL, Sánchez AJ, Giraldo Pérez A, Bono A, Datovo A, Flecker AS, Sanches A, Godinho AL, Matthiensen A, Peressin A, Hilsdorf AWS, Barufatti A, Hirschmann A, Jung A, Cruz-Ramírez AK, Braga Silva A, Cunico AM, Saldanha Barbosa A, de Castro Barradas A, Rêgo ACL, Franco ACS, Costa APL, Vidotto-Magnoni AP, Ferreira A, Kassner Filho A, Nobile AB, Magalhães ALB, da Silva AT, Bialetzki A, Dos Santos Maroclo Gomes AC, Nobre AB, Casimiro ACR, Angulo Sibaja A, Dos Santos AAC, de Araújo ÁR, Frota A, Quirino BA, Ferreira BM, Albuquerque BW, Meneses BA, Oliveira BT, Torres Parahyba Campos BA, Gonçalves BB, Kubiak BB, da Silveira Prudente B, de Araujo Passos Pacheco BG, Nakagawa BK, do Nascimento BTM, Maia C, Cantagallo Devids C, Rezende CF, Muñoz-Mendoza C, Peres CA, de Sousa Rodrigues Filho CA, de Lucena CAS, Fernandes CA, Kasper CB, Donascimiento C, Emidio C Júnior, Carrillo-Moreno C, Machado C, Pera C, Hartmann C, Pringle CM, Leal CG, Jézéquel C, Harrod C, da Rosa CA, Quezada-Romegialli C, Pott CM, Larentis C, Nascimento CAS, da Silva Gonçalves C, da Cunha CJ, Pisicchio CM, de Carvalho DC, Galiano D, Gomez-Uchida D, Santana DO, Salas Johnson D, Petsch DK, de Freitas DTH, Bailly D, Machado DF, de Carvalho DR, Topan DH, Cañas-Rojas D, da Silva D, Freitas-Souza D, Lima-Júnior DP, Piscor D, Moraes DP, Viana D, Caetano DLF, Gubiani ÉA, Okada EK, do Amaral EC, Brambilla EM, Cunha ER, Kashiwaqui EAL, Rocha EA, Barp EA, da Costa Fraga E, D'Bastiani E, Zandonà E, Dary EP, Benedito E, Barba-Macías E, Calvache Uvidia EV, Fonseca FL, Ferreira FS, Lima F, Maffei F, Porto-Foresti F, Teresa FB, de Andrade Frehse F, Oliveira FJM, da Silva FP, de Lima FP, do Prado FD, Jerep FC, Vieira FEG, Gertum Becker F, de Carvalho FR, Ubaid FK, Teixeira FK, Provenzano Rizzi F, Severo-Neto F, Villamarín F, de Mello FT, Keppeler FW, de Avila Batista G, de Menezes Yazbeck G, Tesitore G, Salvador GN, Soteroruda Brito GJ, Carmassi GR, Kurchevski G, Goyenola G, Pereira HR, Alvez HJFS, do Prado HA, Pinho HLL, Sousa HL, Bornatowski H, de Oliveira Barbosa H, Tobes I, de Paiva Affonso I, Queiroz IR, Vila I, Negrete IVJ, Prado IG, Vitule JRS, Figueiredo-Filho J, Gonzalez JA, de Faria Falcão JC, Teixeira JV, Pincheira-Ulbrich J, da Silva JC, de Araujo Filho JA, da Silva JFM, Genova JG, Giovanelli JGR, Andriola JVP, Alves J, Valdiviezo-Rivera J, Brito J, Botero JIS, Liotta J, Ramirez JL, Marinho JR, Birindelli JLO, Novaes JLC, Hawes JE, Ribolli J, Rivadeneira JF, Schmitter-Soto JJ, Assis JC, da Silva JP, Dos Santos JS, Wingert J, Wojciechowski J, Bogoni JA, Ferrer J, Solórzano JCJ, Sá-Oliveira JC, Vaini JO, Contreras Palma K, Orlandi Bonato K, de Lima Pereira KD, Dos Santos Sousa K, Borja-Acosta KG, Carneiro L, Faria L, de Oliveira LB, Resende LC, da Silva Ingenito LF, Oliveira Silva L, Rodrigues LN, Guarderas-Flores L, Martins L, Tonini L, Braga LTMD, Gomes LC, de Fries L, da Silva LG, Jarduli LR, Lima LB, Gomes Fischer L, Wolff LL, Dos Santos LN, Bezerra LAV, Sarmento Soares LM, Manna LR, Duboc LF, Dos Santos Ribas LG, Malabarba LR, Brito MFG, Braga MR, de Almeida MS, Sily MC, Barros MC, do Nascimento MHS, de Souza Delapieve ML, Piedade MTF, Tagliaferro M, de Pinna MCC, Yánez-Muñoz MH, Orsi ML, da Rosa MF, Bastiani M, Stefani MS, Buenaño-Carriel M, Moreno MEV, de Carvalho MM, Kütter MT, Freitas MO, Cañas-Merino M, Cetra M, Herrera-Madrid M, Petrucio MM, Galetti M, Salcedo MÁ, Pascual M, Ribeiro MC, Abelha MCF, da Silva MA, de Araujo MP, Dias MS, Guimaraes Sales N, Benone NL, Sartor N, Fontoura NF, de Souza Trigueiro NS, Álvarez-Pliego N, Shibatta OA, Tedesco PA, Lehmann Albornoz PC, Santos PHF, Freitas PV, Fagundes PC, de Freitas PD, Mena-Valenzuela P, Tufiño P, Catelani PA, Peixoto P, Ilha P, de Aquino PPU, Gerhard P, Carvalho PH, Jiménez-Prado P, Galetti PM Jr, Borges PP, Nitschke PP, Manoel PS, Bernardes Perônico P, Soares PT, Piana PA, de Oliveira Cunha P, Plesley P, de Souza RCR, Rosa RR, El-Sabaawi RW, Rodrigues RR, Covain R, Loures RC, Braga RR, Ré R, Bigorne R, Cassemiro Biagioni R, Silvano RAM, Dala-Corte RB, Martins RT, Rosa R, Sartorello R, de Almeida Nobre R, Bassar RD, Gurgel-Lourenço RC, Pinheiro RFM, Carneiro RL, Florido R, Mazzoni R, Silva-Santos R, de Paula Santos R, Delariva RL, Hartz SM, Brosse S, Althoff SL, Nóbrega Marinho Furtado S, Lima-Junior SE, Lustosa Costa SY, Arrolho S, Auer SK, Bellay S, de Fátima Ramos Guimarães T, Francisco TM, Mantovano T, Gomes T, Ramos TPA, de Assis Volpi T, Emiliano TM, Barbosa TAP, Balbi TJ, da Silva Campos TN, Silva TT, Occhi TVT, Garcia TO, da Silva Freitas TM, Begot TO, da Silveira TLR, Lopes U, Schulz UH, Fagundes V, da Silva VFB, Azevedo-Santos VM, Ribeiro V, Tibúrcio VG, de Almeida VLL, Isaac-Nahum VJ, Abilhoa V, Campos VF, Kütter VT, de Mello Cionek V, Prodocimo V, Vicentin W, Martins WP, de Moraes Pires WM, da Graça WJ, Smith WS, Dáttilo W, Aguirre Maldonado WE, de Carvalho Rocha YGP, Súarez YR, and de Lucena ZMS
- Subjects
- Animals, Ecosystem, Mexico, Caribbean Region, Biodiversity, Fishes, Fresh Water
- Abstract
The Neotropical region hosts 4225 freshwater fish species, ranking first among the world's most diverse regions for freshwater fishes. Our NEOTROPICAL FRESHWATER FISHES data set is the first to produce a large-scale Neotropical freshwater fish inventory, covering the entire Neotropical region from Mexico and the Caribbean in the north to the southern limits in Argentina, Paraguay, Chile, and Uruguay. We compiled 185,787 distribution records, with unique georeferenced coordinates, for the 4225 species, represented by occurrence and abundance data. The number of species for the most numerous orders are as follows: Characiformes (1289), Siluriformes (1384), Cichliformes (354), Cyprinodontiformes (245), and Gymnotiformes (135). The most recorded species was the characid Astyanax fasciatus (4696 records). We registered 116,802 distribution records for native species, compared to 1802 distribution records for nonnative species. The main aim of the NEOTROPICAL FRESHWATER FISHES data set was to make these occurrence and abundance data accessible for international researchers to develop ecological and macroecological studies, from local to regional scales, with focal fish species, families, or orders. We anticipate that the NEOTROPICAL FRESHWATER FISHES data set will be valuable for studies on a wide range of ecological processes, such as trophic cascades, fishery pressure, the effects of habitat loss and fragmentation, and the impacts of species invasion and climate change. There are no copyright restrictions on the data, and please cite this data paper when using the data in publications., (© 2022 The Ecological Society of America.)
- Published
- 2023
- Full Text
- View/download PDF
19. Stream fish metacommunity organisation across a Neotropical ecoregion: The role of environment, anthropogenic impact and dispersal-based processes.
- Author
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Borges PP, Dias MS, Carvalho FR, Casatti L, Pompeu PS, Cetra M, Tejerina-Garro FL, Súarez YR, Nabout JC, and Teresa FB
- Subjects
- Animals, Brazil, Biodiversity, Fishes physiology, Models, Biological, Rivers
- Abstract
Understanding how assemblages are structured in space and the factors promoting their distributions is one of the main goals in Ecology, however, studies regarding the distribution of organisms at larger scales remain biased towards terrestrial groups. We attempt to understand if the structure of stream fish metacommunities across a Neotropical ecoregion (Upper Paraná-drainage area of 820,000 km2) are affected by environmental variables, describing natural environmental gradient, anthropogenic impacts and spatial predictors. For this, we obtained 586 sampling points of fish assemblages in the ecoregion and data on environmental and spatial predictors that potentially affect fish assemblages. We calculated the local beta diversity (Local Contribution to Beta Diversity, LCBD) and alpha diversity from the species list, to be used as response variables in the partial regression models, while the anthropogenic impacts, environmental gradient and spatial factors were used as predictors. We found a high total beta diversity for the ecoregion (0.41) where the greatest values for each site sampled were located at the edges of the ecoregion, while richer communities were found more centrally. All sets of predictors explained the LCBD and alpha diversity, but the most important was dispersal variables, followed by the natural environmental gradient and anthropogenic impact. However, we found an increase in the models' prediction power through the shared effect. Results suggest that environmental filters (i.e. environmental variables such as climate, hydrology and anthropogenic impact) and dispersal limitation together shape fish assemblages of the Upper Paraná ecoregion, showing the importance of using multiple sets of predictors to understand the processes structuring biodiversity distribution., Competing Interests: The authors have declared that no competing interests exist.
- Published
- 2020
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20. Taxonomic and non-taxonomic responses of benthic macroinvertebrates to metal toxicity in tropical reservoirs. The case of Cantareira Complex, São Paulo, Brazil.
- Author
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Beghelli FGS, Cetra M, Marchese M, López-Dovál JC, Rosa AH, Pompêo MLM, and Moschini-Carlos V
- Subjects
- Animals, Brazil, Chlorophyll A analysis, Ecosystem, Environmental Monitoring methods, Geologic Sediments analysis, Invertebrates classification, Linear Models, Phosphorus analysis, Principal Component Analysis, Rivers chemistry, Invertebrates chemistry, Metals toxicity, Water Pollutants, Chemical analysis
- Abstract
Benthic macroinvertebrates are organisms that are recognized as water quality bio-indicators. A wide variety of indices and metrics have been shown to respond to a variety of anthropogenic impacts, usually under a general condition of environmental impairment. The absence of a clear distinction in the relations between specific pollutants and biotic variables is very common and can lead to biased interpretation of biomonitoring. The aims of this research were to test taxonomic and non-taxonomic responses to specific environmental conditions instead to general conditions. For this purpose, we estimated the theoretical toxicity by comparing toxicity values published by EPA with metal concentrations in water and sediments. Then we tested the responses of biological variables to toxicity and other environmental conditions using the linear mixed effects models approach. We generated 32 models considering 24 different biological metrics and indices that were grouped in five levels. Taxonomic and abundance metrics were best predictor than functional or tolerance-based indexes. The strongest model was that which considered subfamily taxonomic resolution responding to Al_w and Cr_s.
- Published
- 2020
- Full Text
- View/download PDF
21. A multiple hypothesis approach to explain species richness patterns in neotropical stream-dweller fish communities.
- Author
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Vieira TB, Pavanelli CS, Casatti L, Smith WS, Benedito E, Mazzoni R, Sánchez-Botero JI, Garcez DS, Lima SMQ, Pompeu PS, Agostinho CS, Montag LFA, Zuanon J, Aquino PPU, Cetra M, Tejerina-Garro FL, Duboc LF, Corrêa RC, Pérez-Mayorga MA, Brejão GL, Mateussi NTB, Castro MA, Leitão RP, Mendonça FP, Silva LRPD, Frederico R, and De Marco P
- Subjects
- Animals, Brazil, Geography, Regression Analysis, Species Specificity, Statistics as Topic, Biodiversity, Fishes physiology, Models, Theoretical, Rivers, Tropical Climate
- Abstract
Several hypotheses are used to explain species richness patterns. Some of them (e.g. species-area, species-energy, environment-energy, water-energy, terrestrial primary productivity, environmental spatial heterogeneity, and climatic heterogeneity) are known to explain species richness patterns of terrestrial organisms, especially when they are combined. For aquatic organisms, however, it is unclear if these hypotheses can be useful to explain for these purposes. Therefore, we used a selection model approach to assess the predictive capacity of such hypotheses, and to determine which of them (combined or not) would be the most appropriate to explain the fish species distribution in small Brazilian streams. We perform the Akaike's information criteria for models selections and the eigenvector analysis to control the special autocorrelation. The spatial structure was equal to 0.453, Moran's I, and require 11 spatial filters. All models were significant and had adjustments ranging from 0.370 to 0.416 with strong spatial component (ranging from 0.226 to 0.369) and low adjustments for environmental data (ranging from 0.001 to 0.119) We obtained two groups of hypothesis are able to explain the richness pattern (1) water-energy, temporal productivity-heterogeneity (AIC = 4498.800) and (2) water-energy, temporal productivity-heterogeneity and area (AIC = 4500.400). We conclude that the fish richness patterns in small Brazilian streams are better explained by a combination of Water-Energy + Productivity + Temporal Heterogeneity hypotheses and not by just one., Competing Interests: The authors have declared that no competing interests exist.
- Published
- 2018
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