• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Conservation Biology >Effects of introduced salmonids on a montane population of Iberian frogs
【24h】

Effects of introduced salmonids on a montane population of Iberian frogs

机译：引进鲑鱼对伊比利亚青蛙山地种群的影响

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

Amphibians are declining worldwide because of multiple factors, including human-mediated introduction of fishes into naturally fishless areas. Although several studies have focused on the effect of exotic fishes on native amphibians breeding in ponds or lakes, little is known about their effects on stream-breeding species. We studied the effects of introductions of native brown trout (Salmo trutta) and exotic brook trout (Salvelinus fontinalis) on the stream-breeding, endemic Iberian frog (Rana iberica) in a protected area in central Spain. We assessed occurrence patterns of tadpoles and salmonids and compared habitat use of the three species. We also determined experimentally whether chemical cues from salmonids elicited antipredator behavior in tadpoles. Finally, we assessed the relative influence of tadpole habitat preferences, differences in salmonid species, and invasion geography on tadpole occurrence. Despite widely overlapping habitat preferences, tadpoles and trout did not coexist, with the former restricted to fishless habitats. Tadpoles detected chemical cues from both trout species and reacted by decreasing their activity, although the response toward the native brown trout was stronger. The residual distribution of Iberian frogs in Penalara is better explained by the geography of fish invasions than by the fish species involved. Measures such as fish extirpation from certain areas, aimed at recovering lost habitat and improving connectivity among remaining populations of Iberian frogs, seem critical for the species' long-term survival in central Spain.
机译：由于多种因素，两栖动物正在全球范围内减少，包括人为介导的将鱼类引入自然无鱼区。尽管有几项研究集中在外来鱼类对池塘或湖泊中本地两栖动物繁殖的影响上，但对它们对河流繁殖物种的影响知之甚少。我们在西班牙中部一个保护区研究了引进本地褐鳟（Salmo trutta）和异国溪鳟（Salvelinus fontinalis）对河流繁殖的特有伊比利亚青蛙（Rana iberica）的影响。我们评估了and和鲑鱼的发生模式，并比较了这三种物种的栖息地使用情况。我们还通过实验确定了鲑鱼的化学线索是否引起了t的反捕食行为。最后，我们评估了habitat栖息地偏好，鲑鱼种类的差异以及入侵地理环境对on发生的相对影响。尽管栖息地偏好广泛重叠，但and和鳟鱼并没有共存，前者仅限于无鱼栖息地。 detected检测到了两种鳟鱼的化学线索，并通过降低其活性进行了反应，尽管对天然褐鳟的反应更强。在Penalara，伊比利亚青蛙的残留分布可以通过鱼类入侵的地理来更好地解释，而不是通过所涉及的鱼类来解释。从某些地区进行鱼类灭绝等措施旨在恢复失去的栖息地并改善伊比利亚青蛙剩余种群之间的联系，这对于该物种在西班牙中部的长期生存至关重要。

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