Portal de Periódicos da CAPES

Sensitivity to uranium of six species of tropical freshwater fishes and four species of cladocerans from Northern Australia

1991; Wiley; Volume: 10; Issue: 11 Linguagem: Inglês

10.1002/etc.5620101110

1552-8618

John F. Bywater, Robyn Banaczkowski, Megan Bailey,

Isotope Analysis in Ecology

Abstract The toxicity of uranium to the tropical freshwater fishes —black‐banded rainbowfish ( Melanotaenia nigrans ), chequered rainbowfish ( Melanotaenia splendida inornata ), Mariana's hardy‐head ( Craterocephalus marianae ), delicate blue‐eye ( Pseudomugil tenellus ), reticulated perchlet ( Ambassis macleayi ), and purple‐spotted gudgeon ( Mogurnda mogurnda ) — and the cladocerans — Diaphanosoma excisum, Latonopsis fasciculata, Dadaya macrops , and Moinodaphnia macleayi — was measured under standard conditions in natural creek water. The fishes' 96‐h LC50s for uranium were 1.7 and 1.9 mg/L for 7‐ and 90‐d‐old black‐banded rainbowfishes, 2.66 and 3.46 mg/L for 7‐ and 90‐d‐old chequered rainbowfishes, 1.22 mg/L for Mariana's hardyhead, 0.73 mg/L for delicate blue‐eyes, 0.8 mg/L for reticulated perchlet, and 1.11 and 1.46 mg/L for 7‐ and 90‐d‐old purple‐spotted gudgeon. The cladocerans' 24‐h LC50s for uranium were 1.0 mg/L for Diaphanosoma excisum , 0.41 mg/L for Latonopsis fasciculata , 1.10 mg/L for Dadaya macrops , and 1.29 mg/L for Moinodaphnia macleayi. Larval purple‐spotted gudgeon, reticulated perchlets, and Moinodaphnia macleayi were identified as the most suitable species for toxicity testing.