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进行了不同 pH(7、7.5、8和8.5)的氨的致死毒性试验及其对斑节对虾(Penaeus monodon Fabricius)早期幼体存活和生长的影响的研究,在96h 毒性试验中显示出,当水 pH 升高时氨毒性增加。对前期溞状幼体在8×10~(-6)氨中估算的 LT_(50)从101.09h 减少到25.16h,对糠虾期幼体在24×10~(-6)氨中,LT_(50)从115.79h减少到11.26h。对后期幼体(PL)在52×10~(-6)氨中并伴之 pH 增加时,LT_(50)就从51.41h 减少到22.58h。在16d 非致死的毒性试验中也研究了 pH 为7.0、7.5、8.0和8.5时3×10~(-6)和6×10~(-6)的氨对斑节对虾幼体和后期幼体存活和生长的影响。结果表明:3×10~(-6)和6×10~(-6)的氨对于对虾的存活和生长都有影响。在3×10~(-6)氨中存活减少27%,在6×10~(-6)氨中存活减少48%,而在3×10~(-6)氨中生长减少4.4%,在6×10~(-6)氨中生长减少6.5%。饲养水的 pH 增加导致前期溞状幼体、糠虾期幼体和后期幼体的存活率明显降低。未观察到 pH 和氨有相互的影响。
The lethal toxicity test of ammonia at different pHs (7, 7.5, 8 and 8.5) and its effect on the survival and growth of early stage larvae of Penaeus monodon Fabricius were studied in a 96 h toxicity test showing that when water Ammonia toxicity increases with increasing pH. The estimated LT 50 of 8 × 10 -6 ammonia in the early stage decreased from 101.09 h to 25.16 h and the value of LT 50 in 24 × 10 -6 ammonia, ) From 115.79 hours to 11.26 hours. The LT50 decreased from 51.41h to 22.58h in 52 × 10 -6 ammonia with PL. In the 16d non-lethal toxicity test, the effects of 3 × 10 -6 (-6) and 6 × 10 -6 ammonia at pH 7.0, 7.5, 8.0 and 8.5 on the survival of larval and late larvae of Penaeus monodon The impact of growth. The results showed that 3 × 10 -6 and 6 × 10 -6 ammonia affected the survival and growth of shrimp. The survival decreased by 27% in 3 × 10 -6 ammonia, 48% decreased in 6 × 10 -6 ammonia, and decreased 4.4% in 3 × 10 -6 ammonia, The growth of 6 × 10 -6 ammonia decreased by 6.5%. Increased pH of the rearing water resulted in significantly lower survival rates of preemina femoris, postnatal larvae and later larvae. No mutual effects of pH and ammonia were observed.