Por favor, use este identificador para citar o enlazar este ítem:
https://hdl.handle.net/20.500.12921/318
Título : | Age and growth of the amazonian migratory catfish Brachyplatystoma rousseauxii in the Madeira River basin before the construction of dams |
Autor : | Hauser, Marília Doria, Carolina R. C. Melo, Larissa R. C. Santos, Ariel R. Ayala, Daiana M. Nogueira, Lorena D. Amadio, Sidinéia Fabré, Nídia Torrente-Vilara, Gislene García Vásquez, Aurea Renno, Jean-François Carvajal Vallejos, Fernando Alonso, Juan C. Nuñez, Jésus Duponchelle, Fabrice |
Palabras clave : | Amazonas Anillos bianuales Bagre Goliat Ciclo vital Otolith |
Fecha de publicación : | 26 |
Editorial : | Instituto de Investigaciones de la Amazonía Peruana |
Resumen : | The goliath catfish Brachyplatystoma rousseauxii has crucial economical and ecological functions in the Amazon basin. Although its life history characteristics have been studied in the Amazon, there is little information in the Madeira River basin, which holds genetically distinct populations and where dams were recently built. Using fish collected in Bolivia, Brazil and Peru, this study provides a validation of growth rings deposition and details the growth patterns of B. rousseauxii in the Madeira before the dams’ construction. Age structure and growth parameters were determined from 497 otolith readings. The species exhibits two growth rings per year and sampled fish were between 0 and 16 years old. In the Brazilian portion of the basin, mainly young individuals below 5 years old were found, whereas older fish (> 5 years) were caught only in the Bolivian and Peruvian stretches, indicating that after migrating upstream to reproduce, adults remain in the headwaters of the Madeira River. Comparing with previous publications, B. rousseauxii had a slower growth and 20 cm lower maximum standard length in the Madeira River than in the Amazon River. This study provides a baseline for future evaluation of changes in population dynamics of the species following dams closure. © 2018 Sociedade Brasileira de Ictiologia. |
URI : | https://hdl.handle.net/20.500.12921/318 |
ISSN : | 16796225 |
Aparece en las colecciones: | Artículos en revistas indexadas |
Ficheros en este ítem:
No hay ficheros asociados a este ítem.
Compartir :
Este ítem está sujeto a una licencia Creative Commons Licencia Creative Commons