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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Age and growth of the Amazonian migratory catfish Brachyplatystoma rousseauxii in the Madeira River basin before the construction of dams

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Author(s):
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Marília Hauser ; Carolina R. C. Doria [2] ; Larissa R. C. Melo [2] ; Ariel R. Santos [2] ; Daiana M. Ayala [2] ; Lorena D. Nogueira [2] ; Sidinéia Amadio [7] ; Nídia Fabré [8] ; Gislene Torrente-Vilara [5, 6] ; Áurea García-Vásquez ; Jean-François Renno ; Fernando M. Carvajal-Vallejos [9, 10] ; Juan C. Alonso [11] ; Jésus Nuñez ; Fabrice Duponchelle [13, 14]
Total Authors: 15
Document type: Journal article
Source: Neotropical Ichthyology; v. 16, n. 1 2018-03-26.
Abstract

ABSTRACT 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. (AU)

FAPESP's process: 16/07910-0 - Javari River basin in the context of "Amazon fish and climate changes - AMAZONFISH"
Grantee:Gislene Torrente Vilara
Support Opportunities: Regular Research Grants