02161naa a2200265 a 450000100080000000500110000800800410001902400440006010000260010424501200013026000090025052013340025965000190159365000160161265000150162865000240164365000170166765000230168465000240170765300130173165300160174465300200176070000210178077300940180120494492017-03-13       2016    bl uuuu     u00u1 u    #d7 a10.4025/actascibiolsci.v38i1.296012DOI1 aVASCONCELOS, H. C. G.  aHost-parasite interaction between crustaceans of six fish species from the Brazilian Amazon.h[electronic resource]  c2016  aHost-parasite interactions between crustaceans and six fish species (Psectrogaster falcata, Ageneiosus ucayalensis, Acestrorhynchus falcirostris, Hemiodus unimaculatus, Serrasalmus gibbus and Geophagus proximus) from a reservoir in eastern Amazon, northern Brazil, were investigated. Eight hundred and seventy-eight parasites belonging to three crustacean species, Excorallana berbicensis, Argulus chicomendesi and Ergasilus turucuyus, which parasitized the hosts? mouth, gills and tegument, were collected from 295 fish and examined. High infestation levels were caused by E. berbicensis on the body surface of the hosts. Excorallana berbicensis showed aggregate dispersion, except in S. gibbus, while E. turucuyus showed random dispersion in A. falcirostris. The host?s sex did not influence infestation by E. berbicensis, and high parasitism failed to affect the body conditions of the fish. In the case of some hosts, rainfall rates, temperature, dissolved oxygen levels and water pH affected the prevalence and abundance of E. berbicensis, the dominant parasite species. Results revealed that the environment and life-style of the hosts were determining factors in infestations by parasites. Current assay is the first report on E. berbicensis for the six hosts, as well as on A. chicomendesi for G. proximus and P. falcata.  aBody condition  aEnvironment  aFreshwater  aCondição corporal  aInfestação  aParasito de animal  aPeixe de água doce  aAmbiente  aInfestation  aParasite animal1 aTAVARES-DIAS, M.  tActa Scientiarum. Biological Sciences, Maringágv. 38, n. 1, p. 113-123, jan./mar. 2016.