摘要
长毛对虾幼体从无节幼体至仔虾期对亚硝酸盐的忍耐性依次增强。在公度32、pH8．20和水温28±0．5℃的条件下，无节、状、糖虾、仔虾24h的LC50值分别为7．63、1509、2292和64．58mg／dm3NO-2－N；状、糠虾、仔虾48h的LC50值分别为11．19、11．41和37．34mg／dm3NO-2-N；仔虾72h和96h的LC50值分别为22.94和13．81mg／dm3NO-2-N。推算出长毛对虾幼体培育期的NO-2－N安全含量为1．38mg／dm3，更为稳妥的NO-2-N安全含量为0.16mg／dm3。
Larval prawn Penaeus penicillalus a progressive increase in nitrite tolerance as the larva metamorphose from nauplius to the postlarva stage. At a salinity of 32,a pH of 8. 20 and a water temperature of 28 ± 0. 5 ℃, the 24h LC50, values for nauplius (N3 ), zoea (Z1 ), mysis (M1 ) and postlarva (P5) are 7. 63, 15. 09,22. 92 and 64. 58 mg/dm3 NO-2-N,respectively. The 48h LC50; values for zoea,mysis and postlarva are 11. 19, 11. 41 and 37. 34 mg/dm3 NO-2-N. The 72h and 96h LC50 values for postlarva are 22. 94 and 13. 81mg/dm3 NO-2 -N,respectively.A 'safe level 'calculated for larval of farmed P. penicillatus is 1. 38 mg/dm3 NO-2 -N. A more conservative 'safe level,' is 0. 16 mg/dm3 NO-2 -N.
出处
《台湾海峡》
CAS
CSCD
1994年第3期236-239,共4页
Journal of Oceanography In Taiwan Strait
基金
福建省自然科学基金
关键词
长毛对虾
亚硝酸盐
毒性试验
LC50
Penaeus penicillatus, nitrite, toxic test, LC_(50), safe level
