Tab. 1. Dietary compositions (IAi%) and trophic categories (TC) of th especies in the mid-course of the Teles Pires River. Trophic categories are presented in abbreviation: Carnivores (Carn.), Detritivores (Det.), Herbivores (Herb.), Insectivores (Inset.), Invertivores (Invert.), Omnivores (Omniv.) and Piscivores (Pisc.). Asterisks indicate that the trophic group was inferred based on published information and a black dots indicates that the item had IAi%<0.01. N= number of stomachs containing food resources; “Terrestrial invertebrates”: Araneae and Scolopendromorpha; “Aquatic invertebrates”: Cladocera, Conchostraca, Copepoda, Hydracarina, Ostracoda, Molusca, Palaemonidae shrimp (Decapoda), unidentified invertebrate eggs, Porifera (spicules) and Tecameba; “Others”: Amphibia, feathers, Nematoda, Fungi and unidentified materials.SpeciesCTNAllochthonousAutochthonousUndetermined originTerrestrial insectsTerrestrial invertebratesVascular PlantsAlgaeAquatic insectsAquatic invertebratesFishDetritusUnidentified insectsOthersOther plantsAcestrocephalus sardinaPisc.*8100Acestrorhynchus cf. grandoculisPisc.*15.0095.00Acestrorhynchus microlepisPisc.140.010.740.2698.960.04Acestrorhynchus sp.Pisc.*1Ageneiosus apiakaInsect.1080.82•0.01•62.530.0136.570.04•0.01•Ageneiosus inermisCarn.*1100Ageneiosus sp.Insect.617.6755.4126.890.03Agoniates halecinusPisc.3013.213.6183.18Aphanotorulus emarginatusDet.*30.4544.382.6930.9820.430.180.90Argonectes longicepsOmniv.*1Auchenipterichthys longimanusOmniv.*1Auchenipterus nuchalisInsect.1017.2381.780.660.140.19Bivibranchia notataInvert.*15.0010.1020.0022.0042.400.50Boulengerella cuvieriPisc.22••99.99Brycon aff. pesuInsect.1666.760.135.858.73•13.121.330.333.74Brycon falcatusHerb.494.200.385.42Brycon pesuInsect.2447.850.0437.34•5.501.130.50•7.64Bryconexodon trombetasiPisc.*1Bryconops alburnoidesInsect.11738.830.030.6360.130.010.070.120.020.16Bryconops colletteiCarn.*195.005.00Caenotropus labyrinthicusInvert.70.160.133.9232.6159.550.323.31Chalceus epakrosHerb.651.575.653.505.9433.34Cichla pinimaPisc.*1100Crenicichla aff. lugubrisCarn.*1100Crenicichla lugubrisCarn.*1100Curimata acutirostrisDet.*1Curimata inornataDet.*3Curimata kneriiDet.*1Curimatella dorsalisDet.*1Cynodon septenariusPisc.*1100Cyphocharax aff. stilbolepisDet.65.880.8341.355.2146.610.060.06Cyphocharax sp.Det.*2Electrophorus electricusPisc.*1100Geophagus aff. altifronsInvert.130.790.100.2534.6638.083.619.930.011.0711.51Geophagus sp.Invert.*1Hemiodus aff. semitaeniatusOmniv.*311.209.062.6415.240.0861.78Hemiodus argenteusInvert.520.1419.3912.1226.777.4714.12Hemiodus cf. gracilisOmniv.*180.0010.0010.00Hemiodus immaculatusOmniv.*2Hemiodus quadrimaculatusOmniv.*1Hemiodus semitaeniatusHerb.70.0366.140.115.090.0610.080.860.0617.58Hemiodus unimaculatusHerb.150.180.4521.097.231.9532.044.7032.35Hemisorubim platyrhynchosPisc.*4Hydrolycus armatusPisc.110.0199.970.03Hydrolycus tatauaiaPisc.160.020.010.6699.32Hypoptopoma cf. gulareDet.*167.0033.00Hypostomus aff. pyrineusiDet.*111.0040.0049.00Jupiaba polylepisInsect.495.031.663.31Jupiaba sp.Insect.*140.0060.00Laemolyta proximaHerb.*130.0070.00Leporinus affinisOmniv.*2Leporinus brunneusOmniv.*2Leporinus cylindriformisOmniv.*1Leporinus fridericiOmniv.*32.825.634.2387.32Leporinus maculatusOmniv.*2Leporinus sp.Omniv.*127.0010.006.0052.005.00Moenkhausia aff. oligolepisCarn.*1100Moenkhausia cf. lepiduraCarn.*245.8654.14Moenkhausia cotinhoCarn.*6Moenkhausia grandisquamisInsect.236.190.1074.602.580.020.0616.45Moenkhausia megalopsOmniv.*31.885.0121.2871.050.650.13Moenkhausia sp. "pedunculo curto"Carn.*270.5929.41Moenkhausia sp. "pedunculo longo"Carn.*11.0084.0015.00Mylesinus cf. paucisquamatusHerb.44.531.702.4591.32Myleus setigerHerb.201.510.0472.541.2811.330.130.140.3012.74Myloplus asteriasHerb.*298.921.08Myloplus rubripinnisHerb.190.5795.380.26•0.033.75Myloplus schomburgkiHerb.642.730.2412.910.051.932.410.1639.56Myloplus torquatusHerb.1010.8488.580.120.510.020.430.02•0.019.47Peckoltia cf. cavaticaDet.*1Pimelodus cf. blochiiCarn.*8Pimelodus ornatusInvert.*3Plagioscions quamosissimusPisc.999.980.02Prochilodus nigricansDet.*224.9817.4120.101.9935.52Psectrogaster essequibensisDet.*22.972.1691.892.97Pseudoplatystoma punctiferPisc.*3Pterodoras granulosusOmniv.*180.0020.00Roeboides aff. descalvadensisPisc.798.1791.790.010.03Sartor cf. tucuruienseOmniv.*2Scobinancistrus cf. pariolisposInvert.*1Serrasalmus aff. serrulatusPisc.*398.901.10Serrasalmus eigenmanniPisc.*290.919.09Serrasalmus manueliPisc.*30.552.823.020.1187.890.585.04Serrasalmus rhombeusPisc.280.040.570.1699.050.18Tetragonopterus chalceusInsect.171.140.29•89.241.044.691.731.88Tetragonopterus aff. georgiaeCarn.*245.2954.71Tocantinsia piresiHerb.192.6481.530.840.017.50•7.48Tometes sp.Herb.*15.344.021.921.3987.32Triportheus albusInsect.2536.480.0217.6842.111.33•0.012.37Utiaritichthys sp.Herb.101.5015.573.441.530.060.4977.40