...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Aquatic Biology >Tolerance and response of silver perch Bairdiella chrysoura to hypoxia.
【24h】

Tolerance and response of silver perch Bairdiella chrysoura to hypoxia.

机译：银鲈对低氧的耐受性和响应。

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

Silver perch Bairdiella chrysoura are an abundant and ecologically important species that are exposed to major hypoxic events throughout much of their range. Acute sensitivity tests (24 h) were conducted, and the lethal concentration of low dissolved oxygen (DO) determined for B. chrysoura (mean+or-SE) 32.5+or-4.0 mm standard length (SL) at 1.10 mg l-1 (95% CI, 0.43-1.52 mg l-1). The avoidance by B. chrysoura to low DO was tested based on size class (mm SL): <=25, between 26-50, 51-75, and >=76, with normal DO concentrations (control) throughout a partitioned aquarium, and later, with an oxygen gradient from low DO (<1 mg l-1) up to high DO (>5 mg l-1). There was a significant difference between the expected and observed distribution for the 3 smaller size classes towards higher DO levels, while the largest size class showed no significant difference in distribution and a G-test showed that oxygen choice levels were significantly different between size classes. The 3 largest size classes of B. chrysoura were tested in a swimming speed apparatus under 3 current speeds (0.17, 0.25, and 0.36 m s-1) with both high DO and low DO concentrations. A 3-way ANOVA showed that there was a significant increase in swimming capacity with increasing fish size, decreasing current speed, and increased DO, as well as a significant interaction between all 3 variables. This is one of the first studies to examine size-related responses to low DO in a sciaenid fish.
机译：银鲈 Bairdiella chrysoura 是一种丰富且具有生态学意义的物种，在其大部分范围内都暴露于主要的低氧事件。进行了急性敏感性测试（24小时），并确定了低溶解氧（DO）的致死浓度。 chrysoura （平均+或SE）在1.10 mg l -1 时为32.5+或-4.0 mm标准长度（SL）（95％CI，0.43-1.52 mg l - 1 ）。 B的回避。 chrysoura 根据大小等级（mm SL）：<= 25，在26-50、51-75和> = 76之间进行测试，整个分区鱼缸中的DO浓度正常（对照），并且之后，氧梯度从低溶解氧（<1 mg l -1 ）到高溶解氧（> 5 mg l -1 ）。对于较高的溶解氧水平，三个较小尺寸类别的预期和观察到的分布之间存在显着差异，而最大尺寸类别显示的分布没有显着差异，并且 G 检验表明氧选择水平尺寸等级之间存在显着差异。 B的3个最大尺寸类别。 chrysoura 在游泳速度仪中以3种当前速度（0.17、0.25和0.36 m s -1 ）在高DO和低DO浓度下进行了测试。三向方差分析表明，随着鱼的大小增加，水流速度的降低和溶解氧的增加，游泳能力显着增加，并且所有三个变量之间都存在显着的相互作用。这是最早研究在短骨鱼类中对低溶解氧的大小相关反应的研究之一。

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