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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Metabolic scope and hypoxia tolerance of Atlantic croaker (Micropogonias undulatus Linnaeus, 1766) and spot (Leiostomus xanthurus Lacepede, 1802), with insights into the effects of acute temperature change
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Metabolic scope and hypoxia tolerance of Atlantic croaker (Micropogonias undulatus Linnaeus, 1766) and spot (Leiostomus xanthurus Lacepede, 1802), with insights into the effects of acute temperature change

机译：大西洋克罗珀的代谢范围和缺氧容差（微ogogonias undulatus linnaeus，1766）和现场（Leiostomus xanthurus lacepede，1802），具有急性温度变化的影响

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摘要

Dynamic conditions in estuaries result in fish experiencing acute changes in temperature and oxygen levels, the magnitude of which are predicted to increase due to directional climate change. Acute changes in temperature impose physiological stress on individuals through alterations in metabolism (often quantified as aerobic metabolic scope) that affect growth, reproduction, movement, and hypoxia tolerance; and their magnitude can thus have population-level consequences. Furthermore, increases in the magnitude of acute changes in temperature and oxygen levels in estuaries may reduce the availability of suitable habitat. We used intermittent-flow respirometry to determine the effects of acute temperature changes on the metabolic scope and hypoxia tolerance of Atlantic croaker and spot; two economically and ecologically important species in Chesapeake Bay. For Atlantic croaker, metabolic scope increased from 15 to 25 degrees C but did not change from 25 to 30 degrees C, whereas metabolic scope increased from 15 to 30 degrees C for spot. The metabolic scope of Atlantic croaker and spot was comparable at all temperatures examined. Hypoxia tolerance, and the effects of temperature on hypoxia tolerances, did not differ by species. Our results indicate that Atlantic croaker and spot are well-adapted to the conditions they currently experience in Chesapeake Bay. Decreased availability of suitable habitat as environmental conditions continue to change will, however, result in increased competition for resources. Our results suggest that under these conditions, spot will have a competitive advantage over Atlantic croaker which may alter the dynamics of the Chesapeake Bay ecosystem.
机译：河口的动态条件导致鱼类温度和氧水平急性变化的鱼类，其幅度预计由于定向气候变化而增加。通过影响生长，繁殖，运动和缺氧耐受性的新陈代谢（通常量化为有氧代谢范围）的改变，温度变化对个体的生理压力施加了对个体的生理压力;因此，它们的幅度可以具有人口级别的后果。此外，河口中温度和氧水平的急性变化的大小增加可能降低合适的栖息地的可用性。我们使用间歇流呼吸测定法以确定急性温度变化对大西洋克罗克及斑点的代谢范围和缺氧耐受性的影响;切萨皮克湾的两种经济和生态重要的物种。对于大西洋克罗克，代谢范围从15到25摄氏度增加，但没有从25到30摄氏度变化，而代谢范围从15℃增加到点。大西洋克罗斯克和斑点的代谢范围在检查的所有温度下都是可比的。缺氧耐受性，以及温度对缺氧耐受性的影响，物种没有差异。我们的结果表明，大西洋克罗斯克和现场很好地适应了他们目前在切萨皮克湾经历的条件。然而，随着环境条件的不断变化，合适的栖息地的可用性降低将导致资源增加。我们的结果表明，在这些条件下，现货将在大西洋克罗斯克拥有竞争优势，这可能改变切萨皮克湾生态系统的动态。

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    Marcek Benjamin J.; Brill Richard W.; Fabrizio Mary C.;

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    William & Mary Dept Fisheries Sci Virginia Inst Marine Sci POB 1346 Gloucester Point VA 23062 USA|Ohio State Univ Dept Evolut Ecol & Organismal Biol Aquat Ecol Lab 1314 Kinnear Rd 230 Res Ctr Columbus OH 43212 USA;

    William & Mary Dept Fisheries Sci Virginia Inst Marine Sci POB 1346 Gloucester Point VA 23062 USA|Ohio State Univ Dept Evolut Ecol & Organismal Biol Aquat Ecol Lab 1314 Kinnear Rd 230 Res Ctr Columbus OH 43212 USA;

    William & Mary Dept Fisheries Sci Virginia Inst Marine Sci POB 1346 Gloucester Point VA 23062 USA|Ohio State Univ Dept Evolut Ecol & Organismal Biol Aquat Ecol Lab 1314 Kinnear Rd 230 Res Ctr Columbus OH 43212 USA;

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  • 正文语种 eng
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  • 关键词

    Intermittent-flow respirometry; Metabolic scope; Acute temperature change; Hypoxia tolerance;

    机译：间歇流动呼吸测定;代谢范围;急性温度变化;缺氧耐受性;

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