首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   4篇
  完全免费   1篇
  水产渔业   5篇
  2014年   1篇
  2011年   1篇
  2010年   1篇
  2007年   1篇
  2005年   1篇
排序方式: 共有5条查询结果,搜索用时 22 毫秒
1
1.
为探讨MS222在罗非鱼麻醉运输中应用的可能性,在密封式塑料袋中进行了罗非鱼幼鱼的模拟运输。分别用0 mg/L、10 mg/L、20 mg/L和30 mg/L MS222对广特超品系尼罗罗非鱼(Oreochromis niloticus)幼鱼进行处理,在处理0 h、1 h、3 h和7 h后测定各袋水中溶氧量和氨含量,以计算各时段的耗氧率、排氨率及氧氮比。试验结果表明,在7 h的模拟运输过程中,10 mg/L、20 mg/L和30 mg/L MS222可以分别降低罗非鱼的平均耗氧量10.0%、31.4%和40.5%,降低排氮率12.4%、37.8%和42.8%。因此,30 mg/L的MS222更适宜于广特超品系罗非鱼幼鱼运输。  相似文献
2.
We used blood vessel myography and a perfused tail preparation from the Chinook salmon (Oncorhynchus tshawytscha) to investigate the effect of 2 commercially used fish anaesthetics, AQUI-STM and MS222, on vascular tone. Hepatic portal vein rings were exposed to 1 × 10−7 M adrenaline in the presence or absence of either AQUI-STM or MS222 and changes in vessel tension measured. Tail preparations were perfused with saline containing increasing concentrations of either anaesthetic. Exposure to either anaesthetic did not alter the response of vessel rings to adrenaline in vitro. However, both anaesthetics caused a significant (P ≤ 0.05) decrease in vessel tension when compared to controls. In tail preparations, perfusion with either anaesthetic caused a significant (P ≤ 0.05) yet reversible, dose dependent decrease in vascular resistance. Further to this, it was found that for both anaesthetics there was a significant effect of fish holding time on the response of preparations, with fish that were acclimated for less than 1 week exhibiting less vasodilation in response to anaesthetic exposure. We conclude that commonly used concentrations of AQUI-STM and MS222 can have a direct effect on vascular tone of salmon vessels, causing a significant but reversible vasodilation of vessels. This vasodilation may offset increases in haematocrit seen during anaesthesia in the whole animal, and in recovery prevent large rises in peripheral resistance associated with catecholamine release. A reduced vascular resistance may allow the heart to pump greater volumes of blood during recovery.  相似文献
3.
The genotoxicity of the anaesthetic MS222 (tricaine) was analysed in fish under both in vivo and in vitro conditions. Based on results of the single cell gel/Comet assay, MS222 had no direct genotoxic effect on the experimental fish, indicating that MS222 does not induce primary DNA damage. These results suggest that the use of this important anaesthetic in aquaculture can be considered to be safe in terms of genotoxicity. R. E. Barreto and A. M. M. C. Gontijo contributed equally to the study.  相似文献
4.
Responses to anaesthesia with essential oil (EO) of Aloysia triphylla (135 and 180 mg L?1) and tricaine methanesulfonate (MS222) (150 and 300 mg L?1) were assessed in silver catfish. Exposure to the anaesthetics elicited a stress response in the species. In the case of MS222, it was displayed as a release of cortisol into bloodstream, elevation in hematocrit and plasma ion loss. The EO presented cortisol‐blocking properties, but increased haematocrit and disturbances of hydromineral balance were observed. Liver antioxidant/oxidant status of EO and MS222‐anaesthetized silver catfish was also estimated. The synthetic anaesthetic induced lipoperoxidation, notwithstanding increased catalase contents, whereas the naturally occurring product was capable of preventing the formation of lipid peroxides, possibly due to combined actions of catalase and glutathione‐S‐transferase. Anaesthetic efficacy was also tested via induction and recovery times. Overall, the promising results obtained for the physiological parameters of the EO‐treated fish counterbalanced the slight prolonged induction time observed for 180 mg L?1. As for 135 mg L?1, both induction and recovery times were lengthy; despite that, the EO was able to promote oxidative protection and mitigate stress. None of the MS222 concentrations prompted such responses concomitantly.  相似文献
5.
MS-222的药液浸浴和药液鳃部喷洒可作为史氏鲟(Acipenser schrenckii)和中华鲟(Acipenser sinensis)的麻醉方式。在水温16~18℃的条件下,史氏鲟的浸浴有效浓度为90~110 mg/L,浸浴安全时间不超过30 min;中华鲟的浸浴有效浓度为80~100 mg/L,浸浴安全时间不超过15 min。史氏鲟药液鳃部喷洒有效浓度为1 500 mg/L,最低有效操作时间为30 s,持续操作时间不超过60 s;药液鳃部喷洒有效浓度为4 000 mg/L,有效操作时间不大于5 s。20~40 mg/L MS-222麻醉液浸浴方式可以作为史氏鲟4 h内的短途运输。史氏鲟在90~150 mg/L的MS-222的药液中超过240 min,试验鱼无法复苏,即生物学死亡。MS-222对中华鲟一般麻醉浓度为80~100 mg/L,其在80 mg/L的MS-222中连续浸浴15 min是安全的。  相似文献
1
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号