Garcia-Vasquez A., Vargas G., Sanchez H., Tello S., Duponchelle Fabrice. (2015). Periodic life history strategy of Psectrogaster rutiloides, Kner 1858, in the Iquitos region, 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 (S4), p. 31-39. International Conference of the “Research Network on Amazonian Ichthyofauna” (RIIA), 4., Cochabamba (BOL), 2014/09/30-2014/10/02. ISSN 0175-8659.
Titre du document
Periodic life history strategy of Psectrogaster rutiloides, Kner 1858, in the Iquitos region, Peruvian Amazon
Année de publication
2015
Auteurs
Garcia-Vasquez A., Vargas G., Sanchez H., Tello S., Duponchelle Fabrice
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 (S4), p. 31-39 ISSN 0175-8659
Colloque
International Conference of the “Research Network on Amazonian Ichthyofauna” (RIIA), 4., Cochabamba (BOL), 2014/09/30-2014/10/02
The present study objective was to determine some of the main life history characteristics of the chiochio, Psectrogaster rutiloides, a heavily fished, yet poorly studied species of the Peruvian Amazon. Over an annual cycle between 2006 and 2007 a monthly sampling of P. rutiloides on the Iquitos market provided a total of 2973 individuals. The species reproduces during the rainy season, during the first part of the flooding period. First sexual maturity is reached at about 2years of age and 95mm standard length (SL) for both males and females. Batch fecundity was related to fish size and varied from 59800 to 149100 oocytes, with oocytes diameters of 1.34 +/- 0.11mm, valid for females of 141 and 152mm SL and of 102.9 and 149.6g body mass, respectively. Females grew faster than males in every age class, a difference gradually increasing from 7% at age one to 10% at age nine, which corresponded to the oldest individuals sampled. Estimated mortality parameters and exploitation rates suggested over-exploitation of the species in the Loreto region.
Plan de classement
Limnologie biologique / Océanographie biologique [034]
;
Ressources halieutiques [040]
Description Géographique
PEROU ; AMAZONIE ; IQUITOS
Localisation
Fonds IRD [F B010066196]
Identifiant IRD
fdi:010066196
