01675naa a2200301 a 450000100080000000500110000800800410001902200140006002400540007410000160012824500870014426000090023152008580024065000190109865000210111765000170113865000220115565000210117765000100119865000100120865000130121865000170123165300130124870000230126170000140128470000240129877300510132221492432022-12-06       2022    bl uuuu     u00u1 u    #d  a0044-59677 ahttp://dx.doi.org/10.1590/1809-43922022014302DOI1 aLIMA, A. F.  aPredation on pirarucu larvae by opportunistic fish species.h[electronic resource]  c2022  aOne of the constraints in pirarucu, Arapaima gigas farming is the reproduction in captivity, due to inconsistent number of spawning events per reproductive cycle, thus, unreliable availability of juvenile fish. This is a first-hand report on predation of pirarucu larvae by opportunistic fish species in a breeding pond. Fish samples were collected for stomach content analysis from a pirarucu-breeding pond with reported predation on the larvae. We obtained 61 fish of different species (Tetragonopterus sp., Astyanax bimaculatus, Moenkhausia intermedia, Hoplias malabaricus, and Apistogramma sp.). Tetragonopterus sp. stomachs had the highest frequency of occurrence of pirarucu larvae (83.3%), followed by A. bimaculatus (7.4%). The relationship between the feeding behaviour of these species and their predation upon pirarucu offspring is discussed.  aArapaima gigas  aFeeding behavior  aReproduction  aStress management  aHabito Alimentar  aLarva  aPeixe  aPirarucu  aReprodução  aEstresse1 aREIS, A. G. P. dos1 aAKAMA, A.1 aMACIEL-HONDA, P. O.  tActa Amazonicagv. 52, n. 4, p. 299-302, 2022.