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首页> 外文期刊>Aquatic Sciences >Complex size-dependent habitat associations in potamodromous fish species
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Complex size-dependent habitat associations in potamodromous fish species

机译：淡水鱼类物种中依赖于大小的复杂栖息地关联

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摘要

Knowledge of the distribution of species life stages at multiple spatial scales is fundamental to both a proper assessment of species management and conservation programmes and the ability to predict the consequences of human disturbances for river systems. The habitat requirements of three native cyprinid species—the Iberian barbel Barbus bocagei Steindachner, the Iberian straight-mouth nase Pseudochondrostoma polylepis (Steindachner), and the Northern straight-mouth nase Pseudochondrostoma duriense (Coelho)—were examined at 174 undisturbed or minimally disturbed sites in 8 river catchments across western Iberia, by modelling occurrence and counts of species life stages at two spatial scales— large (regional) and instream (local)—using hurdle models. All the life stages of the barbel showed a negative association with upstream high-gradient river reaches, whereas juvenile P. duriense favoured such areas. Stream width and openness were negatively related with the occurrence of juvenile and small adult barbel, but not with large adults. Juvenile nase, on the other hand, were found to be mainly confined to fast-flowing habitats with high instream cover and coarser substrata. Advanced life stages of the barbel were mainly associated with the "pure" regional and shared components, whereas the purely local attributes accounted for much of the model variation among nases, in particular juveniles, and juvenile barbel. The results of this study are useful for setting or refining management goals, and highlight the need to separately consider life stages when performing conservation-related studies of species distribution.
机译：了解物种在不同空间尺度上的生命阶段分布，对于正确评估物种管理和保护计划以及预测人为干扰对河流系统的后果的能力都是至关重要的。在174个不受干扰的地点进行了最小程度的考察，对三种本地鲤科鱼类的栖息地需求进行了最小的扰动评估，这些物种分别是伊比利亚易口的Barbus Barbus bocagei Steindachner，伊比利亚直口纳氏菌Pseudochondrostoma polylepis（Steindachner）和北部直口纳氏菌Pseudochondrostoma duriense（Coelho）。在伊比利亚西部的8个河流流域中，通过使用障碍模型对两个空间尺度（大型（区域）和下游（本地））物种生命阶段的发生和计数进行建模。触须的所有生命阶段都与上游高梯度河段呈负相关，而少年杜鹃则偏爱此类地区。溪流的宽度和开放度与幼年和成年小口须的发生呈负相关，而与大成年则不相关。另一方面，发现幼鱼主要被限制在快速流动的生境中，这些生境具有较高的河床覆盖率和较粗糙的地层。触须的晚期生活阶段主要与“纯粹的”区域和共享成分有关，而纯局部属性则占了鼻孔，尤其是少年和少年触须之间模型变化的大部分。这项研究的结果对于设定或完善管理目标很有用，并强调在进行与物种保护有关的研究时，需要分别考虑生命阶段。

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  • 来源
    《Aquatic Sciences》 |2011年第2期|p.233-245|共13页
  • 作者

    José Maria Santos; Luís Reino; Miguel Porto; João Oliveira; Paulo Pinheiro; Pedro Raposo Almeida; Rui Cortes; Maria Teresa Ferreira;

  • 作者单位

    CEF, Centra de Estudos Florestais, Instituto Superior de Agronomia, Universidade Tecnica de Lisboa,1349-017 Lisbon, Portugal;

    CEF, Centra de Estudos Florestais, Instituto Superior de Agronomia, Universidade Tecnica de Lisboa,1349-017 Lisbon, Portugal,CIBIO, Centra de Investigagão em Biodiversidade e Recursos Genéticos, Universidade do Porto, Campus Agrário de Vairão,4485-661 Vairāo, Portugal,ERENA-Ordenamento e Gestāo de Recursos Naturais,Rua Robalo Gouveia 1-1 A, 1900-392 Lisbon, Portugal,Cátedra "Rui Nabeiro"-Biodiversidade, CIBIO,Universidade de Évora, 7004-516 Évora, Portugal;

    Departamento de Biologia Vegetal, CBA,Centra de Biologia Ambiental, Faculdade de Ciencias de Lisboa,Universidade de Lisboa, C2 Campo Grande,1749-016 Lisbon, Portugal;

    CITAB, Centra de Investigãc,ao e de Tecnologias Agro-Ambientais e Biológicas, Universidade de Trás-os-Montes e Alto Douro, Quinta de Prados, 5001-801 Vila Real, Portugal;

    AQUALOGUS-Engenharia e Ambiente,Rua da Tobis Portuguesa, n.° 8-Escritório 3,1750-292 Lisbon, Portugal;

    Departamento de Biologia, Universidade de Évora,7002-554 Évora, Portugal,Instituto de Oceanografia, Faculdade de Ciencias de Lisboa,Universidade de Lisboa, Campo Grande,1749-016 Lisbon, Portugal;

    CITAB, Centra de Investigãc,ao e de Tecnologias Agro-Ambientais e Biológicas, Universidade de Trás-os-Montes e Alto Douro, Quinta de Prados, 5001-801 Vila Real, Portugal;

    CEF, Centra de Estudos Florestais, Instituto Superior de Agronomia, Universidade Tecnica de Lisboa,1349-017 Lisbon, Portugal;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    life stage; regional/local environment; pca; hurdle models; variation partitioning; cyprinids;

    机译：生命阶段;区域/局部环境;pca;障碍模型;变异划分;塞浦路斯;

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