| 摘要: |
| 研究了臭氧处理后的海水对西施舌(Coelomactra antiquata)胚胎孵化率、幼虫摄食率、生长率和成活率的影响。结果表明,臭氧处理后的海水的化学耗氧量(COD)及NH4+-N的浓度明显下降。 西施舌胚胎在通入臭氧(4.17mg/L)10min的海水中,孵化率最高,为97%,在充入臭氧25min的海水中孵化率最低,为72.7%;西施舌幼 虫在充入臭氧10～15min的海水中和未经处理的海水中生长较快;幼虫在充入臭氧5min和10min的海水中成活率有所提高。将幼虫放在多次充入臭氧 的海水中培养,再放回未经臭氧处理的海水进行17h和30h恢复,30h后其死亡率达85%,而在充入臭氧时间短的的海水中死亡率较低,为33.3%,表 明西施舌幼虫的生理机能受到了臭氧的不可恢复破坏。 |
| 关键词: 臭氧 西施舌(Coelomactra antiquata) 孵化率 幼虫 生长 成活率 |
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| 基金项目:国家863计划资助项目(2004AA603140);福建省重大项目(2003N020);福建省重点项目(2006N0038) |
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| Effects of ozone treatment on embryo hatch rate,ingestion rate and growth and survival of Coelomactra antiquata larvae |
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| Abstract: |
| The effects of ozone treated seawater on the hatch rate of Coelomactra antiquata embryos, the ingestion rate and growth as well as survival of the larvae were studied. The results showed that contents of COD and NH4+-N in the experimental seawater after ozone treatment were significantly reduced. When embryos of the clam were treated by 4.17 mg/L ozone for 10 minutes, the hatch rate was up to 97 %, while for 25 minutes, the hatch rate was a minimum of 72.7 %. The larvae cultured respectively in seawater treated by 4.17 mg/L ozone from 10 minutes to 15 minutes and in untreated water grew faster. Survival of the larvae in the ozone treatments for 5 minutes and 10 minutes increased. When the larvae were cultured in high concentrations of ozone that was given several times to the seawater continuously and the larvae were placed back again in the seawater without ozone, and then reactivated for 17 hours and 30 hours,the result showed after 30 hours, the mortality of the larvae was 85 %, while exposuring to low concentrations of ozone, the mortality was a minimum of 33.3 %. The result revealed that the physiological function of the larvae was destroyed by ozone treatment at irreversible state. |
| Key words: ozone Coelomactra antiquata hatch rate larvae growth survival |
