Gonçalves, Bruno Bastos [UNESP]Tejerina-Garro, Francisco LeonardoNeto, Carlos De Melo E Silva2018-12-112018-12-112016-01-01Fronteiras, v. 5, n. 1, p. 226-234, 2016.2238-8869http://hdl.handle.net/11449/173146This study aims to assess the condition factor (K) of five fish species (Serrasalmus rhombeus, Psectrogaster amazonica, Loricaria cataphracta, Panaque nigrolineatus and Squaliforma emarginata). Samplings were conducted during the low-water period of 2007 and 2008 using gillnets and minnow traps. All equipments were placed along a stretch of 1000 m at 5 pm and retrieved at 7 am. Collected fish were taxonomically identified, weighed (g) and measured (standard length; mm). The fish fitness was assessed by the condition factor (K=W/L) and compared among groups of tributaries by a Kruskal-Wallis test. From the five species considered, two (S. emarginata and P. amazonica) displayed significant differences of the condition factor among the groups of tributaries. The highest values of K correspond to fish located in the headwaters, while lowest values are observed in tributaries located in the floodplain.226-234engFitnessPsectrogaster amazonicaSqualiforma emarginataArtigo10.21664/2238-8869.2016v5i1.p226-234Acesso restrito2-s2.0-84976506089