BIOMETRIC RELATIONSHIPS AND EXPLOITATION OF Mylossoma albiscopum ("PALOMETA") IN THE UCAYALI RIVER, PERU
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This study aimed to analyze the biometric relationships and exploitation of Mylossoma albiscopum (“palometa”) in the Ucayali River, Peru. Length-weight and age-length relationships were evaluated based on data collected between 2008 and 2019 by the Peruvian Marine Institute (IMARPE). The results showed positive allometric growth in both sexes (females: Pt = 0.024 Lt³·2⁴; males: Pt = 0.03 Lt³·1¹), with a significant difference (ANOVA, p < 0.0001). Growth was rapid, reaching 14.0 cm in the first year and an asymptotic length of 33.81 cm (K = 0.49 year⁻¹; t₀ = –0.29 years). Total mortality was Z = 2.96, with natural mortality M = 1.15 and fishing mortality F = 1.81, resulting in an exploitation rate E = 0.61, exceeding the sustainability limit (E < 0.5). These results demonstrate a state of overexploitation of the species in the Ucayali basin, jeopardizing population renewal and highlighting the need for sustainable fisheries management measures aimed at conserving this key resource for Amazonian food security.
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Barletta, M., Cussac, V., Agostinho, A., Baigún, C., Okada, E., Catella, A., Fontoura, N., Pompeu, P., Jiménez, L., Batista, V., Lasso, C., Taphorn, D., & Fabré, N. (2015). Fisheries ecology in South American river basins. In Freshwater Fisheries Ecology (pp. 311–348). Wiley Blackwell.
Bonilla, C., & Córdoba, E. (2025). Population Parameters and Stock Assessment of Mylossoma albiscopum (Characiformes: Serrasalmidae) in the Amazonian Plain of the Putumayo River, Colombia. Fisheries Management and Ecology, 32(5), 354–365. https://doi.org/https://doi.org/10.1111/fme.12808.
Cajado, R., Oliveira, L., Suzuki, M., & Zacardi, D. (2020). Spatial diversity of ichthyoplankton in the lower stretch of the Amazon River, Pará, Brazil. Acta Ichthyologica et Piscatoria, 50(2), 127–137. https://doi.org/10.3750/AIEP/02786.
Castello, L. (2021). Science for conserving Amazon freshwater ecosystems. Aquatic Conservation: Marine and Freshwater Ecosystems, 31(5), 999–1004. https://doi.org/10.1002/aqc.3615.
Cella, A., Hauser, M., Nogueira, L., Doria, C., & Torrente, 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.
Da Costa, M., Tubino, R., & Monteiro, C. (2018). Length-based estimates of growth parameters and mortality rates of fish populations from a coastal zone in the Southeastern Brazil. Zoologia, 35, 1–8. https://doi.org/10.3897/zoologia.35.e22235.
Doria, C., Lima, M., & Angelini, R. (2018). Ecosystem indicators of a small-scale fisheries with limited data in Madeira river (Brazil). Boletim do Instituto de Pesca, 44(3). https://doi.org/10.20950/1678-2305.2018.317.
Fitzgerald, C., Delanty, K., & Shephard, S. (2018). Inland fish stock assessment: Applying data-poor methods from marine systems. Fisheries Management and Ecology, 25(4), 240–252. https://doi.org/10.1111/fme.12284.
Froese, R. (2006). Cube law, condition factor and weight-length relationships: History, meta-analysis and recommendations. Journal of Applied Ichthyology, 22(4), 241–253. https://doi.org/10.1111/j.1439-0426.2006.00805.x.
García, A., Vargas, G., Tello, S., & Duponchelle, F. (2012). Desembarque de pescado fresco en la ciudad de Iquitos, región Loreto, Amazonía Peruana. Folia Amazónica, 21. https://doi.org/10.24841/fa.v21i1-2.31.
Gayanilo, F., Sparre, P., & Pauly, D. (1996). FAO-ICLARM stock assessment tools (FISAT) user’s manual. FAO Computerized Information Series (Fisheries). https://www.researchgate.net/publication/216900170_FAO-.ICLARM_stock_assessment_tools_FISAT_user's_manual.
Gayanilo, F., Sparre, P., & Pauly, D. (2005). FAO-ICLARM Stock Assessment Tools II (FiSAT II). FAO Computerized Information Series (Fisheries). https://openknowledge.fao.org/handle/20.500.14283/y5997e
Pauly, D. (1979). Theory and management of tropical multispecies stocks: a review, with emphasis on the Southeast Asian demersal fisheries. ICLARM. https://s3-us-west-2.amazonaws.com/legacy.seaaroundus/doc/Researcher+Publications/dpauly/PDF/1979/Books+and+Chapters/TheoryManagementOfTropicalMultispeciesStocks.pdf
Pauly, D. (1980). On the interrelationships between natural mortality, growth parameters, and mean environmental temperature in 175 fish stocks. ICES Journal of Marine Science, 39(2), 175–192. https://doi.org/10.1093/icesjms/39.2.175
Pauly, D. (2005). Length-converted catch curves: A powerful tool for fisheries research in the tropics (Part I). In Fishbyte. (Vol.1 pp. 9-13). ICLARM.
Pereira, D., Arantes, C., Sousa, K., & Freitas, C. (2023). Relationships between fishery catch rates and land cover along a longitudinal gradient in floodplains of the Amazon River. Fisheries Research, 258, 106521. https://doi.org/https://doi.org/10.1016/j.fishres.2022.106521.
Pérez, A., & Aniello, B. (2013). Parámetros poblacionales de los principales recursos pesqueros de la cuenca del río Apure, Venezuela (2000-2003). Latin American Journal of Aquatic Research, 41, 447–458. http://dx.doi.org/103856/vol41-issue3-fulltext-8.
Quinn, T., & Deriso, R. (1999). Quantitative Fish Dynamics (Biological). Press, Oxford University.
Rodríguez, C., Castro, J., Domínguez, Á., García, A., & Cabrera, R. (2023). Every Fish Counts: Challenging Length–Weight Relationship Bias in Discards. Fishes, 8 (5), 222. https://doi.org/10.3390/fishes8050222.
Salazar, L., Riofrío, J., Zavaleta, J., & Rubio, J. (2021). Análisis de los desembarques de la pesca comercial en Yarinacocha (Ucayali, Perú) entre 2015–2019. Revista de Investigaciones Veterinarias del Perú, 32 (4), e20931. https://doi.org/10.15381/rivep.v32i4.20931.
Zacardi, D., Santos, J., de Oliveira, L., Cajado, R., & Pompeu, P. (2020). Ichthyoplankton studies as referential for the management and monitoring of fishery resources in the Brazilian Amazon basin. Acta Limnologica Brasiliensia, 32, 1–9. https://doi.org/10.1590/s2179-975x6619.
Zaldívar, E, & Riofrío, Q. (2016). Fecundidad de Mylossoma duriventre ("palometa") en Ucayali durante el Ciclo Reproductivo 2011-2012 . Revista de Investigaciones Veterinarias del Perú, 27 (1), 183–187. http://dx.doi.org/10.15381/rivep.v27i1.11451.
Zavaleta, J., Salazar, L., & Riofrío, J. (2021). Population dynamics of Mylossoma albiscopum (Characiformes: Serrasalmidae) in the Ucayali River. Journal of Applied Ichthyology, 38, 17-27. https://doi.org/https://doi.org/10.1111/jai.14279.
Zorrilla, E., Vela, A., Muro, P., & Dañino, A. (2017). Características de la pesquería comercial en la cuenca del río Ucayali. Folia Amazónica, 25(2), 159. https://doi.org/10.24841/fa.v25i2.400.