...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Fish Biology >Feeding guilds and food resource partitioning in a lake fish assemblage: an ontogenetic approach
【24h】

Feeding guilds and food resource partitioning in a lake fish assemblage: an ontogenetic approach

机译：湖泊鱼类群中的行会和食物资源分配：个体发育方法

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

Ontogenetic diet patterns and trophic guild structure of a 15 species temperate lake fish assemblage were analysed over wide size intervals (up to seven orders of magnitude in body mass), representing practically the whole life span in most species. A two-step objective clustering technique supplemented with other multivariate statistical tools proved that size-related diet changes clearly played an important role in structuring trophic organization of fishes inhabiting Lake Balaton. As many as 13 out of the 15 fish species showed marked size-related dietary changes with two to four ontogenetic feeding stages. At the assemblage level, 11 trophic guilds were separated. Guild membership was size-dependent in 11 fish species that participated in two to four trophic guilds during their life span. The most complex trophic ontogeny was observed in roach Rutilus rutilus and asp Aspius aspius with four guild memberships. This study showed that trophic status of fishes may be very size-sensitive and thus a universal classification of fish species to general trophic guilds, such as 'planktivore', 'benthivore', 'piscivore' or 'herbivore', should be applied very carefully even in environmental monitoring and fisheries management applications, unless it is supported by relevant results of life span diet analyses.
机译：分析了15种温带湖鱼组合的个体发育饮食模式和营养行会结构，分析范围很广（体重高达七个数量级），几乎代表了大多数物种的整个寿命。通过两步客观聚类技术以及其他多元统计工具，证明与大小有关的饮食变化显然在构造巴拉顿湖鱼类的营养组织中起了重要作用。在15种鱼类中，多达13种显示出明显的大小相关饮食变化，并有2至4个个体发育的喂养阶段。在组合级别，分离了11个营养协会。公会成员资格取决于11种鱼类的大小，这些鱼类在其一生中参与了2至4个营养协会。在具有四个公会成员的蟑螂Rutilus rut​​ilus和asp Aspius aspius中观察到最复杂的营养个体。这项研究表明，鱼类的营养状况可能对尺寸非常敏感，因此应非常谨慎地对鱼类进行通用的营养协会分类，例如“浮游生物”，“食肉动物”，“食肉动物”或“草食动物”。即使在环境监测和渔业管理应用中，除非有生命周期饮食分析的相关结果支持。

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