The doncella Pseudoplatystoma punctifer is an economically and ecologically important catfish in the Amazon basin. However, little is known about its age, growth and population dynamics parameters. This study aims to validate the formation of growth marks in vertebrae of individuals collected from two rivers systems of the Peruvian Amazon (Amazon-Marañón-Ucayali and Putumayo) and compare growth parameters using the von Bertalanffy growth function between sexes and systems. A total of 372 individuals from the Amazon-Marañón-Ucayali (AMU) system and 93 from the Putumayo River were analyzed. The formation of one growth ring per year was validated and the individual ages ranged from zero to nine years old. Females grew significantly larger than males in both systems. Both females and males grew significantly better in the AMU system than in the Putumayo River. Maximum observed length and size at maturity in the AMU system were lower than those reported in previous studies in the area, and together with an important proportion of juveniles in the catches, suggest that the species is heavily exploited. Further studies on the reproductive biology and population dynamics of the doncella are needed in order to implement management measures more in line with the current situation.
|State||Published - 2022|
Bibliographical noteFunding Information:
This study was financed by the partnership between the Institut de Recherche pour le D?veloppment (IRD) from France and the Programa de Investigaci?n para el Uso y Conservaci?n del Agua y sus Recursos (AQUAREC) of the Instituto de Investigaciones de la Amazon?a Peruana (IIAP). In addition, this study was part of the M. Armas master thesis supported by the Amazonian Fishes and Climate Change Project (203?2015 FONDECYT?UNMSM). This study is dedicated to the memory of Aurea Garc?aVasquez, dearest colleague and friend who sucumbed to covid-19. We miss you. Collection authorization according to the Ministerial Resolution N? 1497-2018 PRODUCE/DGPCHDI (3/Oct/2018).
This study was financed by the partnership between the Institut de Recherche pour le Développment (IRD) from France and the Programa de Investigación para el Uso y Conservación del Agua y sus Recursos (AQUAREC) of the Instituto de Investigaciones de la Amazonía Peruana (IIAP). In addition, this study was part of the M. Armas master thesis supported by the Amazonian Fishes and Climate Change Project (203–2015 FONDECYT–UNMSM). †This study is dedicated to the memory of Aurea García-Vasquez, dearest colleague and friend who sucumbed to covid-19. We miss you.
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- Fisheries management