• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Biology of Fishes >Spatial and temporal patterns of diversity and distribution of the UpperJurua River fish community (Brazilian Amazon)
【24h】

Spatial and temporal patterns of diversity and distribution of the UpperJurua River fish community (Brazilian Amazon)

机译：上朱拉河鱼类群落（巴西亚马逊河）多样性和分布的时空格局

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

We studied spatial and temporal patterns in fish species composition and diversity at the upper Jurua River located in the west Brazilian Amazon. We collected with gillnet 822 fishes belonging to 90 species in the main Jurua River, its tributaries and the floodplain lakes during wet and dry seasons. Fish abundance and species richness were greater in the dry season. During that season, fishes may be concentrated due to the low water level, being caught more easily by gillnets. There has been a trend towards a greater fish biomass caught in lakes. This might be associated with a greater environmental stability as lakes may be less subject to large variations in water level. The fish communities differed between the two seasons and between lakes and the lotic environments (main river and tributaries). Fish species from the family Curimatidae were most abundant in the lakes, while Pimelodus spp. and Hypostomus spp. predominated in the main Jurua River. Seasonal variations in fish communities may be related to differences in the migratory behavior among fish species. Such spatial and temporal patterns influencing fish community structure at the Upper Jurua Extractive Reserve must be accounted for in management and conservation strategies.
机译：我们研究了巴西西部亚马逊河上游的汝拉河上游鱼类物种组成和多样性的时空格局。在雨季和旱季，我们在朱拉河主要河道，其支流和洪泛区湖中用刺网收集了822种鱼，它们属于90种。在干旱季节，鱼类的丰度和物种丰富度更高。在那个季节，由于水位低，鱼类可能会集中，容易被刺网捕获。越来越多的趋势是湖泊中捕获的鱼类生物量增加。这可能与更大的环境稳定性有关，因为湖泊可能较少受到水位变化的影响。在两个季节之间以及湖泊与水环境（主要河流和支流）之间，鱼类群落有所不同。在湖中，Curimatidae科的鱼类种类最多，而Pimelodus spp。和Hypostomus spp。主要在汝拉河上。鱼群的季节性变化可能与鱼种之间迁徙行为的差异有关。必须在管理和保护策略中考虑到影响上朱拉亚野生动物保护区鱼类群落结构的这种时空格局。

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