Evaluating morphometric variations in tocantins river fish: implications for conservation
Abstract
The aim of this study was to characterize the fish species Triportheus angulatus, Psectrogaster amazonica and Pellona castelnaeana from the middle Tocantins River. Samples were collected from stretches of the Tocantins River, such as Cacauzinho and Beira Rio. Statistical program was used to evaluate seven variables from the three species under study, which were then classified according to their degree of correlation. According to Pearson's correlation analysis, the variables were significantly associated with the characteristics of the three species examined. The averages of the variables studied were highest for Pellona castelnaeana, and lower for Psectrogaster amazonica and Triportheus angulatus. Morphometric comparisons between males and females revealed statistically significant differences (p < 0.05) in total length and body depth, indicating potential sexual dimorphism related to ecological or reproductive roles. The condition factor (K) ranged from 1.28 to 1.65, reflecting a generally good nutritional status among individuals. Future studies focusing on the sex and age of fish are necessary to analyze how regional anthropogenic problems have influenced the morphometric characteristics of these species and to identify the factors that contribute to the decline in fish quality. These results could support future local and regional conservation efforts, considering that fishing in the region is economically and culturally important.
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References
Agostinho, A. A., Pelicice, F. M., & Gomes, L. C. (2018). Biodiversidade na planície de inundação do alto rio Paraná. Eduem.
Agência Nacional de Águas. (2020). Região hidrográfica Tocantins-Araguaia. ANA. https://http://www.ana.gov.br/
Agência Nacional de Águas. (2024). Tocantins. https://www.ana.gov.br/sala-de-situacao/tocantins/saiba-mais-tocantins.
Araújo, A. S., Lima, L. T. B., Nascimento, W. S., Yamamoto, M. E., & Chellappa, S. (2012). Características morfométricas-merísticas e aspectos reprodutivos da sardinha de água doce, Triportheus angulatus (Osteichthyes: Characiformes) do rio Acauã do bioma Caatinga. Biota Amazônia, 2(1), 59-73.
Allan, J. D., Castillo, M. M., & Capps, K. A. (2021). Ecologia de riachos: estrutura e função das águas correntes (3a ed.). Springer Nature.
Barros, N. H. C., Lima, L. T. B., Araújo, A. S., Gurgel, L. L., Chellappa, N. T., & Chellappa, S. (2016). Estudos sobre as táticas e as estratégias reprodutivas de sete espécies de peixes de água doce do Rio Grande de Norte, Brasil. Holos, 3, 84-103.
Barros Pinheiro P., Mata‐Oliveira I., Gomes do Rêgo M., Mourato B., & Hissa, V. H. F. (2021). Reproductive biology of the white marlin (Kajikia albida) in the southwestern and equatorial Atlantic Ocean. Journal of Applied Ichthyology, 37(4), 523-533. https://doi.org/10.1111/jai.14216
Barai, A. A., Souza, A. F. L. D., Viana, A. P., & Inhamuns, A. J. (2021). Seasonal influence on centesimal composition and yield of Amazonian fish. Food Science and Technology, 42, 1-10. https://doi.org/10.1590/fst.55320
Campos, C. P., Catarino, M. F., & Freitas, C. E. C. (2019). Avaliação do estoque do tucunaré Cichla temensis (Humboldt, 1821), importante recurso pesqueiro do médio rio Negro, Amazonas, Brasil. Revista Brasileira de Biologia, 80(3) 506510. https://doi.org/10.1590/1519-6984.203124
Pereira, M. C., Souza, R. F. C., Barbosa, L. A., Viana, D. C., Cunha, D. B., & Queiroz, C. (2025). Ichthyofauna of the Middle Tocantins River, Imperatriz, Maranhão, Brazil. International Journal of Agriculture and Biology, 33, 1-6. https://doi.org/10.17957/IJAB/15.2272
Cazorla, A. L., Molina, J. M., & Ruarte, C. (2014). The artisanal fishery of Cynoscion guatucupa in Argentina: Exploring the possible causes of the collapse in Bahía Blanca estuary. Journal of Sea Research, 88, 29-35. https://doi.org/10.1016/j.seares.2013.12.016
Cavalcanti, M. J., & Lopes, P. R. D. (1990). Morfometria Comparada de Ctenosciaena gracilicirrhus, Baralonchurus brasiliensis e Micropogonias furnieri (Teleosteis: Sciaenidae) pela Análise Multivariada de Rede de Treliças. Revista Brasileira de Zoologia, 7(4), 62735. https://doi.org/10.1590/S0101-81751990000400016
Cavalcanti, M. J., & Lopes, P. R. D. (1993). Análise Morfométrica Multivariada de Cinco Espécies de Serranidae (Teleostei, Perciformes). Acta Biological Leopoldensia, 15, 53-64.
Cella‐Ribeiro, A., Hauser, M., Nogueira, L. D., Doria, C. R. C., & Torrente‐Vilara, G. (2015). Length–weight relationships of fish from Madeira River, Brazilian Amazon, before the construction of hydropower plants. Journal of applied ichthyology, 31(5), 939-945. https://doi.org/10.1111/jai.12819
Cochran-Biederman, J. L., & Winemiller, K. O. (2010). Relationships among habitat, ecomorphology and diets of cichlids in the Bladen River, Belize. Environmental Biology of Fishes, 88(2), 143-152. https://doi.org/10.1007/s10641-010-9624-y
Dagosta, F. C. P., & Pinna, M. (2019). The fishes of the Amazon: distribution and Biogeographical Patterns, with a Comprehensive List of species. Bulletin of the American Museum of Natural History, 431, 1-163. https://doi.org/10.1206/0003- 0090.431.1.1
Duré, M. I. (1999). Interrelationships in the trophic niches of two syntopic species of the Family Hylidae (Anura) in a subtropical area of Argentina. Cuadernos de Herpetología, 13(1-2), 11-18.
Esteban, S. (2011). Buscando patrones ecomorfológicos comunes entre ungulados actuales y xenartros extintos. Ameghiniana, 48(2), 189-209, 2011. http://dx.doi.org/10.5710/AMGH.v48i2(313)
Oliveira, L. S., Cajado R. A., Santos, L. R. B., Lima Suzuki, M. A., & Zacard D. M. (2020) Bancos de macrófitas aquáticas como locais de desenvolvimento das fases iniciais de peixes em várzea do Baixo Amazonas. Oecologia Australis, 24(3), 644-660.
Fairbairn, D. J. (1997). Allometry for sexual size dimorphism: pattern and process in the coevolution of body size in males and females. Annual Review of Ecology and Systematics, 28, 659-687. https://doi.org/10.1146/annurev.ecolsys.28.1.659
Ferreira, K. A. L., Jacinto, J. J. S., Ferreira, V. R., & Viana, D. C. (2024). Innovation and management of fish farming enterprises in the western mesoregion of Maranhão, Brazil. Revista Sustinere, 12, 60-67. https://doi.org/10.12957/sustinere.2024.86085
Fink, W. L., & Weitzman, S. H. (1974). The So-called Cheirodontin Fishes of Central America with Descriptions of Two New Species (Pisces: Characidae). Smithsonian Contributions to Zoology, 172, 1-56. https://doi.org/10.5479/si.00810282.172
Fonteles-Filho, A. A. (1989). Recursos pesqueiros - Biologia e dinâmica populacional (p. 296). Imprensa Oficial do Ceará.
Freitas, C. E. C., Siqueira-Souza, F. K., Humston, R., & Hurd, L. E. (2013). An initial assessment of drought sensitivity in Amazonian fish communities. Hydrobiologia, 705, 159-171. https://doi.org/10.1007/s10750-012-1394-4
Ikeziri, A. A. S. L., Queiroz, L. J., Costa Doria, C. R., Fávaro, L. F., Araújo, T. R., & Torrente-Vilara, G. (2008). Estrutura populacional e abundância do apapá-amarelo, Pellona castelnaeana (Valenciennes, 1847) (Clupeiformes, Pristigasteridae), na Reserva Extrativista do rio Cautário, Rondônia. Revista Brasileira de Zoociências, 10(1), 41-50.
Gomes, L. N., Pinheiro Junior, J. R., & Piorski, N. (2003). Aspectos ecomorfológicos da comunidade de peixes do estuário do rio Anil, Ilha de São Luís, MA. Boletim do Laboratório Hidrobiologia, 16(1), 1-10.
Karr, J. R., & James F. C. (1975). Ecomorphological configurations and convergent evolution in species and communities. In M. L. Cody, J. M. Diamond (Eds.), Ecology and Evolution of Communities (p. 258-291). Belknap Press.
Lira, A. S., Lucena-Fredou, F., Menard, F., Fredou, T., Gonzalez, J. G., Ferreira, V., & Le Loc’h, F. (2021). Trophic structure of a nektobenthic community exploited by a multispecific bottom trawling fishery in Northeastern Brazil. Plos one, 16(2), 246-491. https://doi.org/10.1371/journal.pone.0246491
Malabarba, M. C. S. L. (2004). Revision of the Neotropical genus Triportheus Cope, 1872 (Characiformes: Characidae). Neotropical Ichthyology, 2(4), 167-204.
Mariac, C., Renno, J. F., Vigouroux, Y., Mejia, E., Angulo, C., Castro Ruiz, D., & Duponchelle, F. (2022). Species-level ichthyoplankton dynamics for 97 fish in two large Amazonian watersheds using quantitative metabarcoding. Ecologia Molecular, 31(6), 1627-1648. https://doi.org/10.1111/mec.15944
Motta, F. S., Caltabellotta, F. P., Namora, R. C., & Gadig, O. B F. (2013). Technical contribution Length-weight relationships of sharks caught by artisanal fisheries from southeastern Brazil. Journal of Applied Ichthyology, 1, 1-2. https://doi.org/10.1111/jai.12234
Moraes, D. D. A. (2003). Morfometria geométrica e a “Revolução na Morfometria” localizando e visualizando mudanças na forma dos organismos. Bioletim, 3, 1-5.
Morrone, J. J., & Escalante T. (2012). Diccionario de Biogeografía. Talleres grupo San Jorge.
Mourão, J., & Nordi, N. (2003), Etnoictiologia de pescadores artesanais do estuário do rio Mamanguape, Paraíba, Brasil. Boletim do Instituto de Pesca, 29, 9-17.
Nascimento, W. S., Araújo, A. S., Barros, N. H. C., Gurgel, L. L., Costa, E. F. S., & Chellappa S. (2012). Length-Weight relationship for seven freshwater fish species from Brazil. Journal of Applied Ichthyology, 28(2), 272-274. https://doi.org/10.1111/j.1439-0426.2011.01906.x
Nagelkerke, L. A. J., Van Onselen, E., Van Kessel, N., & Leuven, R. S. E. W. (2018). Functional feeding traits as predictors of invasive success of alien freshwater fish species using a food- fish model. PLoS one, 13(6), e0197636. https://doi.org/10.1371/journal.pone.0197636
Prestes L., Soares M. G. M., Silva F. R., & Bittencourt, M. M. (2010). Dinâmica populacional de Triportheus albus, T. angulatus e T. auritus (Characiformes: Characidae) em lagos da Amazônia Central. Biota Neotropica, 10(3), 177-181. https://doi.org/10.1590/S1676-06032010000300020
Reis, R. E., Kullander, S. O., & Ferraris Junior, C. J. (2020). Check list of the Freshwater Fishes of South and Central America. Edipucrs. Porto Alegre. Brazil. https://www.nrm.se/download/18.bb3f71108335b4bcd80003241/
Taylor, B. M., Trip, E. D., & Choat, J. H. (2018). Dynamic demography: Investigations of life-history variation in the parrotfishes. In Biology of parrotfishes (p. 69-98).
R Core Team. (2022). R: A language and environment for statistical computing. Version 4.2.2. Vienna: R Foundation for Statistical Computing. https://www.r-project.org
Santana, H. S., Dei Tos, C., & Minte-Vera, C. V. A. (2020). review on the age and growth studies of freshwater fish in South America. Fisheries Research, 222, 1-12. https://doi.org/10.1016/j.fishres.2019.105410
Santos, G. M. D., Jegu, M., & Merona, B. D. E. (1984). Catálogo de peixes comerciais do baixo rio Tocantins, projeto Tucuruí. Eletronorte/CNPq INPA.
Silva, V. E. L., Silva-Firmiano L. P. S., Teresa F. B., Batista V. S., Ladle R., & Fabré, N. N. (2019). Functional Traits of Fish Species: Adjusting Resolution to Accurately Express Resource Partitioning. Frontiers in Marine Science, 6, 303. https://doi.org/10.3389/fmars.2019.00303
SAS Institute Inc. (2021). SAS Studio (Version 3.81) [Computer software]. https://www.sas.com
Strauss R. E. (1985). allometry and variation in body the south American catfish genus Corydoras (Callichthyidae). Systematic Zoology, 34(4), 381-396. https://doi.org/10.2307/2413203
Zar, J. H. (1999). Biostatistical Analysis (4th). Prentice-Hall Inc.
Vari, R. (1991). Systematics of the neotropical characiform genus Psectrogaster (Pisces: Characiformes). Smithsonian Contributions to Zoology. http://dx.doi.org/10.5479/si.00810282.481
Watson, D. J., & Balon, E. K. (1984). Ecomorphological analysis of fish taxocenes in rainforest streams of northern Borneo. Journal of Fish Biology, 25(3), 371-384. https://doi.org/10.1111/j.1095-8649.1984.tb04885.x
Werdelin, L., & Wesley-Hunt, G. D. (2014). Carnivoran ecomorphology: patterns below the family level. Annales Zoologici Fennici, 51(1-2), 259-268. https://doi.org/10.5735/086.051.0224
Copyright (c) 2025 Leticia Almeida Barbosa, Marilene dos Santos Maciel, Fabrício Reis Gomes, Laith Jawad, Cleonilde Queiroz, Diego Carvalho Viana
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