Survival, Acid—Base Balance, and Gaping Responses of the Asian Oyster Crassostrea ariakensis and the Eastern Oyster Crassostrea virginica During Clamped Emersion and Hypoxic Immersion
Survival, Acid—Base Balance, and Gaping Responses of the Asian Oyster Crassostrea ariakensis and the Eastern Oyster Crassostrea virginica During Clamped Emersion and Hypoxic Immersion
复制标题
亚洲牡蛎和东部牡蛎在夹紧浮出和缺氧浸泡过程中的生存、酸碱平衡和张开反应
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
K. Paynter
中科院分区：
文献类型：
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作者：
Sara A. Lombardi;N. Harlan;K. Paynter
摘要
东方牡蛎Crassostrea virginica具有显著的耐低氧能力;然而，许多实现这种耐受性的生化机制仍然知之甚少。此外，很少有人知道亚洲牡蛎的耐缺氧和适应。通过比较这些近缘种，我们可以了解更多的生理机制负责缺氧耐受性。弗吉尼亚州。我们评估的时间死亡率和张口反应，在这两个物种在缺氧。成人C ariakensis比C. virginica比C.弗吉尼亚州。任何一个物种的张口都与周围海水的酸化有关。比较了C. virginica和C. ariakensis之间的0 h和24 h。在这两个物种中，血淋巴pH值随着时间的推移而下降，C。在整个研究期间，ariakensis血淋巴的酸性显著高于C.弗吉尼亚州。在我们的样品中观察到的帕金苏斯海洋的感染水平与血淋巴pH值的变化，在任何一个物种。我们的研究结果证明了生存的根本差异，并表明这些物种之间存在重要的生理差异。
ABSTRACT
The eastern oyster Crassostrea virginica has a remarkable ability to withstand low oxygen conditions; however, many of the biochemical mechanisms by which that tolerance is accomplished remain poorly understood. In addition, little is known about hypoxia tolerances and adaptations of the Asian oyster Crassostrea ariakensis. By comparing these closely related species, we may learn more about the physiological mechanisms responsible for the hypoxia tolerance of C. virginica. We assessed the time to mortality and gaping responses in both species during hypoxia. Adult C. ariakensis died earlier than C. virginica and gaped more often and wider than C. virginica. Gaping by either species was associated with acidification of the ambient seawater. We also compared the hemolymph pH of emersed and clamped C. virginica and C. ariakensis between 0 h and 24 h. In both species, hemolymph pH declined over time, and C. ariakensis hemolymph became significantly more acidic throughout the study period than that of C. virginica. The infection levels of Perkinsus marinus observed in our samples were not correlated with hemolymph pH changes in either species. Our findings demonstrate fundamental differences in survival and suggest important physiological differences exist between these species.