Publications des scientifiques de l'IRD

Duponchelle Fabrice, Arce A. R., Waty A., Garcia-Vasquez A., Renno Jean-François, Chu-Koo F., Garcia-Davila C., Vargas G., Tello S., Ortiz A., Pinedo R., Vasquez R. M., Nunez Rodriguez Jesus. (2015). Variations in reproductive strategy of the silver Arowana, Osteoglossum bicirrhosum Cuvier, 1829 from four sub-basins of the Peruvian Amazon. In : Darias Maria Jose (ed.), Amadio S. (ed.), Rosenthal H. (ed.). Proceedings of the 4th International Conference of the "Research Network on Amazonian Ichthyofauna" (RIIA). Journal of Applied Ichthyology, 31 (no spécial S4), p. 19-30. ISSN 0175-8659.

Titre du document
Variations in reproductive strategy of the silver Arowana, Osteoglossum bicirrhosum Cuvier, 1829 from four sub-basins of the Peruvian Amazon
Année de publication
2015
Type de document
Article référencé dans le Web of Science WOS:000370008700004
Auteurs
Duponchelle Fabrice, Arce A. R., Waty A., Garcia-Vasquez A., Renno Jean-François, Chu-Koo F., Garcia-Davila C., Vargas G., Tello S., Ortiz A., Pinedo R., Vasquez R. M., Nunez Rodriguez Jesus
In
Darias Maria Jose (ed.), Amadio S. (ed.), Rosenthal H. (ed.), Proceedings of the 4th International Conference of the "Research Network on Amazonian Ichthyofauna" (RIIA)
Source
Journal of Applied Ichthyology, 2015, 31 (no spécial S4), p. 19-30 ISSN 0175-8659
The aim of this study was to assess the variability of reproductive characteristics of the silver Arowana, Osteoglossum bicirrhosum, in four sub-basins of the Peruvian Amazon: the Amazonas, Ucayali, Napo and Putumayo rivers. An illustrated, detailed gonadal maturation scale is proposed for a clearer determination of the reproductive status of male and female Arowana. The breeding season occurred during the dry season and early rising waters in the Amazonas and Ucayali, whereas it was restricted to the dry season in the Napo and Putumayo. A same female can reproduce more than once during the breeding season. Age at maturity was reached during the second year, at sizes varying between 43-45cm for males and 46-50cm SL for females. Important variations in fecundity were observed between fish of the four sub-basins, whereas mean oocytes diameter and mass did not vary significantly, suggesting differences in reproductive investment. Together with previously reported variations of growth patterns in the same sub-basins, these results suggest the existence of distinct populations in the Peruvian Amazon, with important consequences for management and conservation, but also for future aquaculture development programs.
Plan de classement
Limnologie biologique / Océanographie biologique [034]
Description Géographique
PEROU ; AMAZONIE
Localisation
Fonds IRD [F B010066195]
Identifiant IRD
fdi:010066195
Contact