• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Southeastern naturalist >Identifying Life-History Traits that Promote Occurrence for Four Minnow (Leuciscidae) Species in Intermittent Gulf Coastal Plain Streams
【24h】

Identifying Life-History Traits that Promote Occurrence for Four Minnow (Leuciscidae) Species in Intermittent Gulf Coastal Plain Streams

机译：识别在间歇性海湾沿海普通溪流中促进促进四种minnow（leuciscidae）种类的生命历史特征

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Life-history traits of stream fishes partly reflect adaptations to disturbance regimes, which in turn shape assemblage composition via environmental filters. In this study, we focused on life-history traits of 4 morphologically similar leuciscid species in coastal plain streams of southwestern GA that are shifting from historically perennial to intermittent flow. We evaluated the following traits hypothesized to influence species persistence in intermittent streams: differences in reproductive timing, sex ratio, body size at maturity, reproductive investment, and diet. First, we ordinated published species occurrence data for samples of fish communities in perennial and intermittent streams in the study region, and identified 4 focal taxa as differing in their associations with intermittency. We then periodically sampled individuals of the focal taxa in 14 streams over a year (May 2016-April 2017). We found that for Pteronotropis harperi (Redeye Chub), a species strongly associated with intermittent streams, reproductive timing did not overlap with typical seasonal stream drying. Redeye Chub also had the significantly smallest minimum length at maturation and the greatest reproductive investment. Fishes associated with perennial streams (Pteronotropis grandipinnis [Apalachee Shiner] and Notropis texanus [Weed Shiner] ), or not associated with either stream type (Notropis petersoni [Coastal Shiner]), had at least a portion of their reproductive timing overlapping with times when streams were likely to dry, and had similar and significantly lower reproductive investment than Redeye Chub. Redeye Chub displayed no shift in diet when streams ceased flowing, while Apalachee Shiner showed decreases in terrestrial prey. Our results suggest that size at maturity, reproductive timing, and reproductive investment may promote persistence by the Redeye Chub given projections of more frequent and intense periods of stream intermittency.
机译：流鱼类的寿命历史特征部分反映了对扰动制度的适应，这通过环境过滤器转动形状组合组合物。在这项研究中，我们专注于4个形态学上类似的睫毛物种的沿海平原群体的生命历史特征，这些物种在历史上常年转移到间歇性流动。我们评估了以下特征假设，以影响间歇流中的物种持久性：生殖时间，性别比，成熟度，生殖投资和饮食中的生殖比，体型的差异。首先，我们在研究区域中的多年生和间歇性流中的鱼群中的鱼群样本进行了公布的物种发生数据，并确定了4个焦点分类群，与间歇性有关。然后，我们在一年内定期在14个溪流中进行了焦点分类群的个人（2016年5月至2017年4月）。我们发现，对于Pteronotropis Harperi（Redeye Chub），一种与间歇流相关的物种，生殖器时序与典型的季节流干燥没有重叠。 Redeye Chub在成熟和最大的生殖投资中也具有明显的最小长度。与多年生溪流相关的鱼（Pteronotropis grandipinnis [Apalachee闪手]和Notropis Texanus [杂草闪闪发光]），或者与任何流型相关（Notropis petersoni [沿海闪电]），至少有一部分他们的生殖时间与时代重叠溪流可能会干燥，并且具有比Redeye Chub更相似和显着降低的生殖投资。当溪流停止流动时，Redeye Chub没有饮食换档，而Apalachee闪电率在陆地猎物中表现出降低。我们的结果表明，在成熟度，生殖时间和生殖投资方面的规模可能会促进更频繁和强烈的流间歇性时期的预测的持久性。

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