食品科学
食品科學
식품과학
FOOD SCIENCE
2009年
23期
397-400
,共4页
郭丰红%汪之和%陈必文%朱孔辉
郭豐紅%汪之和%陳必文%硃孔輝
곽봉홍%왕지화%진필문%주공휘
分子氨%亚硝态氮%鳜鱼成鱼%毒性%半致死浓度
分子氨%亞硝態氮%鱖魚成魚%毒性%半緻死濃度
분자안%아초태담%궐어성어%독성%반치사농도
molecular ammonia%nitrite%adult Siniperca chuatsi%toxicity%median lethal concentration
活体运输过程中,水体中往往积累了较高浓度的分了氨和业硝态氮.为了探讨分子氨和亚硝态氮在鳜鱼成鱼运输水体中的安全浓度,在水温为18～20℃,盐度为3‰～4‰,pH7.31～7.57,溶解氧(DO)8.2～8.5mg/L的条件下,采用常规的生物毒性试验方法,研究分子氨和亚硝态氮对鳜鱼成鱼(adult Siniperca chuaitsi)毒性的影响.结果表明,分子氨对鳜鱼成鱼24、48、96h的半数致死浓度(LC_(50))分别为0.389、0.295、0.193 mg/L和安全浓度为0.0193mg/L;亚硝态氮对鳜鱼成鱼24、48、96h的半数致死浓度分别为196.32、91.69、75.4 mg/L,安全浓度7.54mg/L.因此,水体中分子氨对鳜鱼成鱼的毒性作用非常明显,易造成鱼体的死亡,而鳜鱼成鱼对亚硝态氮的耐受性稍强.建议保活运输过程中要加强水体的监测,有效地控制水体中氨氮与亚硝态氮的浓度,以提高成活率.
活體運輸過程中,水體中往往積纍瞭較高濃度的分瞭氨和業硝態氮.為瞭探討分子氨和亞硝態氮在鱖魚成魚運輸水體中的安全濃度,在水溫為18～20℃,鹽度為3‰～4‰,pH7.31～7.57,溶解氧(DO)8.2～8.5mg/L的條件下,採用常規的生物毒性試驗方法,研究分子氨和亞硝態氮對鱖魚成魚(adult Siniperca chuaitsi)毒性的影響.結果錶明,分子氨對鱖魚成魚24、48、96h的半數緻死濃度(LC_(50))分彆為0.389、0.295、0.193 mg/L和安全濃度為0.0193mg/L;亞硝態氮對鱖魚成魚24、48、96h的半數緻死濃度分彆為196.32、91.69、75.4 mg/L,安全濃度7.54mg/L.因此,水體中分子氨對鱖魚成魚的毒性作用非常明顯,易造成魚體的死亡,而鱖魚成魚對亞硝態氮的耐受性稍彊.建議保活運輸過程中要加彊水體的鑑測,有效地控製水體中氨氮與亞硝態氮的濃度,以提高成活率.
활체운수과정중,수체중왕왕적루료교고농도적분료안화업초태담.위료탐토분자안화아초태담재궐어성어운수수체중적안전농도,재수온위18～20℃,염도위3‰～4‰,pH7.31～7.57,용해양(DO)8.2～8.5mg/L적조건하,채용상규적생물독성시험방법,연구분자안화아초태담대궐어성어(adult Siniperca chuaitsi)독성적영향.결과표명,분자안대궐어성어24、48、96h적반수치사농도(LC_(50))분별위0.389、0.295、0.193 mg/L화안전농도위0.0193mg/L;아초태담대궐어성어24、48、96h적반수치사농도분별위196.32、91.69、75.4 mg/L,안전농도7.54mg/L.인차,수체중분자안대궐어성어적독성작용비상명현,역조성어체적사망,이궐어성어대아초태담적내수성초강.건의보활운수과정중요가강수체적감측,유효지공제수체중안담여아초태담적농도,이제고성활솔.
During keep-alive transportation of aquatic products, higher-level molecular ammonia and nitrite were often accumulated in water. In order to explore the safe concentration of molecular ammonia and nitrite in water for adult Siniperca chuatsi,an acute toxicity test was conducted to examine the effect of molecular ammonia and nitrite on adult Siniperca chuatsi under the environment of 18-20 ℃ for water temperature, 3‰-4‰ of salinity, pH 7.31-7.57, and 8.2-8.5 mg/L of dissolved oxygen (DO). Results indicated that median lethal concentrations (LC_(50)) of molecular ammonia were 0.389,0.295 mg/L and 0.193 mg/L at the time point of 24, 48h and 96 h, respectively. Thus, the safe concentration of molecular ammonia in water for Siniperca chuatsi was 0.0193 mg/L. Similarly, median lethal concentration (LC_(50)) of nitrite were determined to be 196.32,91.69mg/L and 75.4 mg/L so that its safe concentration was 7.54 mg/L. Based on above investigations, molecular ammonia in water exhibited obvious toxicity to adult Siniperca chuatsi, and resulted in the death offish although adult Siniperca chuatsi revealed resistance to nitrite toxicity to some extent. Therefore, quality monitoring of water to control the contents of ammonia, nitrogen and nitrite during keep-alive transportation of aquatic products is an effective strategy to improve the survival rate of fish.
