...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of Experimental Biology >Energy metabolism and metabolic depression during exercise in Callinectes sapidus, the Atlantic blue crab: effects of the bacterial pathogen Vibrio campbellii
【24h】

Energy metabolism and metabolic depression during exercise in Callinectes sapidus, the Atlantic blue crab: effects of the bacterial pathogen Vibrio campbellii

机译：大西洋蓝蟹Callinectes sapidus在运动过程中的能量代谢和代谢抑制：细菌病原体坎贝尔弧菌

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Callinectes sapidus (Rathbun), the Atlantic blue crab, commonly harbors low to moderate amounts of bacteria in hemolymph and other tissues. These bacteria are typically dominated by Vibrio spp., which are known to cause mortality in the blue crab. The dose-dependent lethality of an isolate of Vibrio campbellii was determined in crabs; the mean 48 h LD(50) (half-maximal lethal dose) was 6.2 x 10(5) colony forming units g(-1) crab. Injection of a sublethal dose of V. campbellii into the hemolymph of the crab resulted in a rapid and large depression (30-42%) of metabolic rate, which persisted for 24 h. Because gills are an organ of immune function as well as respiration, we were interested in how bacteria injected into the crab would affect the energetic costs associated with walking. Overall metabolism (aerobic and anaerobic) more than doubled in crabs walking for 30 min at 8 m min(-1). The metabolic depression resulting from bacterial injection persisted throughout the exercise period and patterns of phosphagen and adenylate consumption within walking leg muscle were not affected by treatment. The ability of crabs to supply required energy for walking is largely unaffected by exposure to Vibrio; however, Vibrio-injected crabs are less aerobic while doing so. This depressed metabolic condition in response to bacteria, present during moderate activity, could be a passive result of mounting an immune response or may indicate an actively regulated metabolic depression. A compromised metabolism can affect the performance of daily activities, such as feeding and predator avoidance or affect the ability to cope with environmental stressors, such as hypoxia.
机译：大西洋蓝蟹Callinectes sapidus（Rathbun）通常在血淋巴和其他组织中藏有中低含量的细菌。这些细菌通常以弧菌为主导，已知弧菌会导致蓝蟹死亡。在螃蟹中测定了坎贝氏弧菌分离株的剂量依赖性致死性。平均48小时LD（50）（半数最大致死剂量）为6.2 x 10（5）菌落形成单位g（-1）蟹。将亚致死剂量的坎贝尔弧菌注射到螃蟹的血淋巴中会导致代谢率快速而大幅度降低（30-42％），并持续24小时。由于g既是免疫功能，也是呼吸作用的器官，所以我们对注入螃蟹的细菌如何影响行走相关的能量消耗很感兴趣。在8 m min（-1）行走30分钟的螃蟹中，总代谢（有氧和无氧）增加了一倍以上。细菌注射引起的代谢抑制在整个运动过程中持续存在，步行腿部肌肉内的磷和腺苷酸消耗模式不受治疗影响。螃蟹为步行提供所需能量的能力在很大程度上不受暴露于弧菌的影响。但是，注射弧菌的螃蟹在这样做时的需氧量较低。在中等强度的活动过程中，这种对细菌的反应产生的抑郁状态可能是免疫应答被动产生的结果，或者可能是主动调节的代谢抑制状态。新陈代谢受损会影响日常活动的表现，例如进食和避免捕食，或影响应付环境压力（例如缺氧）的能力。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号