01457naa a2200253 a 450000100080000000500110000800800410001910000190006024501180007926000090019730000150020652007250022165000090094665000310095565000150098665000150100165300220101665300180103865300160105665300140107265300130108670000210109977300830112010105182021-08-09       1993    bl uuuu     u00u1 u    #d1 aJONSSON, C. M.  aAcute toxicity of endosulfan to the fish Hyphessobrycon bifasciatus and Brachydanio rerio.h[electronic resource]  c1993  a151-155 p.  aAcute toxicity of endosulfan to zebra fish (Brachydanio rerio) and yellow tetra (Hyphessobrycon bifasciatus) was determined by semi-static bioassay. The 24-h LC50 values were 2.6 (2.3-2.9) and 1.6 (1.3-21) ug/L for Hyphessobrycon bifasciatus and Brachydanio rerio, respectively. Behavioral changes including hyperactivity, erratic swimming and convulsions were observed at the highest exposure levels. Histological studies showed predominant acute effects in the gills, with inflammatory infiltration necrosis and separation of respiratory gill epithelim. Degradation studies with endosulfan showed that both alfa- and beta/isomers were very unstable under the test conditions, presenting half-lives of aproximately 24h.  afish  aHyphessobrycon bifasciatus  atoxicology  aEndosulfan  aBrachydanio rerio  aContamination  aInsecticide  aPesticide  aResidues1 aTOLEDO, M. C. F.  tArchives of Environmental Contamination and Toxicologygv.24, p.151-155, 1993.