Garcia-Vasquez A. auteur aut IRD Vargas G. auteur aut IRD Sanchez H. auteur aut IRD Tello S. auteur aut IRD Duponchelle Fabrice auteur aut IRD text journalArticle eng text/pdf born digital access 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. specialized PEROU AMAZONIE 034 040 Darias Maria J. ed. edt IRD Amadio S. ed. edt IRD Rosenthal H. ed. edt IRD 31 S4 31-39 2015 0175-8659 International Conference of the ?Research Network on Amazonian Ichthyofauna? (RIIA), 4., Cochabamba (BOL), 2014/09/30-2014/10/02 https://www.documentation.ird.fr/hor/fdi:010066196 10.1111/jai.12974 0175-8659 [F B010066196] https://www.documentation.ird.fr/hor/fdi:010066196 https://www.documentation.ird.fr/intranet/publi/2016/03/010066196.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2016-04-01 2025-06-11 fdi:010066196 fre