Lethal levels of low dissolved oxygen and effects of short-term oxygen stress on subsequent growth of juvenile Penaeus monodon

摘要: Abstract The lethal level (96 h LC50) of dissolved oxygen (DO) for juvenile Penaeus monodon was estimated to be 0.9 mg O2 l−1 (95% confidence limits: 0.8, 1.0 l−1). Other replicate groups P. were subjected short-term, severe DO stress and then grown under conditions approaching saturation. aim simulate the type event which can occur in ponds when emergency aeration successfully raises after an crisis. Neither duration (4, 8 or 12 h), nor (0.5-0.6 1.0–1.1 l−1) significantly (P>0.05) reduced subsequent growth food conversion efficiency at favourable levels over 21 days. Prawn pond managers should not need reduce feeding consider premature harvest a single, short-term crisis mass mortality is avoided. This provided that other water quality variables do reach critical during