斑节对虾白斑综合症暴发流行与水体理化因子的关系

用海水化学分析方法每天检测5口斑节对虾（Penaeus manodon）养成池两茬共90余天9项水质指标，结果表明它们的变化范围是：温度14．7－31．8℃、盐度13．6－30．6、溶解氧2．3－9．8水质指标，结果表明它们的变化范围是：温度14．7－31．8℃、盐度13．6－30．6、溶解氧2．3－9．8mg／L、pH7．3－9．5、硫化物（S^2-）0－0．13mg／L、磷酸盐（PO4^3-P）0－2．33mg/L、硝酸氮（NO3－N）0－1．33mg／L、亚硝酸氮（NO2^2-N)0．0．28mg／L、氨态氨（NH4^ -N NH3-N)0-0.66mg/L, 皆在斑节对虾该项指楠的耐受范围内，且无论这些因子含量如何变化，5口虾池两茬在虾养殖55d后皆因患WSS而死亡，表明在所检测的虾池这些水质因子并非WSSV感染暴发流行的指标因子。

Study on the Relations Between the Explosive Epidemics of Penaeus monodon White Spot Syndrome and the Seawater Physical and Chemical Factors

With seawater chemical analysis technique, the nine seawater physical and chemical factors from the five shrimp culture ponds of Penaeus monodon were examined each day for about 90 days in 1998. The ranges of the factors were as follows: seawater temperature 14.7～31.8 ℃, salinity 13.6～30.8, dissolved oxygen 2.3～9.8 mg/L, pH7.3～9.5, sulfide(S2-)0～0.13 mg/L, phosphate-P(PO43--P)0～2.33 mg/L, nitrate-N(NO3--N)0～1.3 mg/L, nitrite-N(NO2--N)0～0.28 mg/L, ammonia-N(NH4+-N+NH3-N)0～0.66 mg/L, which were all within the P. monodon tolerance ranges towards these factors. Although the nine water quality factors changed in some way, the shrimps in the five culture ponds all suffered from white spot syndrome after cultured for 55 days. This indicated that the seawater physical and chemical factors were not indicators of the WSS explosive epidemics in the detected ponds.