Work

Population parameters of the red-bellied piranha Pygocentrus nattereri (Kner, 1860) (Characiformes: Serrasalmidae) of the São Miguel River, Rondônia state, Brazil

Year: 2024

Type: article

Abstract: In this study, the structure and distribution of Pygocentrus nattereri populations in the São Miguel River basin, Rondônia state, Brazil, were evaluated. From August 2020 to July 2021, monthly fisheries were carried out, using gillnets with meshes ranging from 40 to 160 mm between opposite knots, which were in place for 48 hours and inspected at 6 am; 12 am; 6 pm and 12 pm. Growth parameters and mortality were estimated using length-frequency data. The population values found for P. nattereri were L∞ = 29 cm, k = 0.55 .year-1, with mortality values: M = 0.57, Z = 0.98 and F = 0.41. year-1. The relationship between weight and length was described by Wt = 0.0372.Lt2.983. The data obtained indicates that the P. nattereri stocks in the study region are not overfished; therefore, measures and actions for a fishing management plan for P. nattereri populations must be implemented for the studied river region in order to prevent the increase in these populations and preserve the other species of fish commercial interest.

Source: Boletim do Instituto de Pesca

DOI: 10.20950/1678-2305/bip.2024.50.e853

Authors: Jordy de Oliveira Dias, Igor Rechetnicow Alves Sant'Anna, Eloi Bispo Bezerra Neto, Raniere Garcez Costa Sousa, Jerônimo Vieira Dantas Filho

Institutions: Universidade Federal de Rondônia, Instituto Federal do Acre, Centro Universitário São Lucas

Language: English

Topic: Fish biology, ecology, and behavior

Subfield: Nature and Landscape Conservation

Field: Environmental Science

Domain: Physical Sciences

SDG: Life below water

Open Access status: gold

Estimated APC paid: $300