Seasonal dynamics of Callibaetis willineri (Ephemeroptera, Baetidae) associated with Eichhornia azurea (Pontedericeae) in Guaraná Lake of the Upper Paraná River, Brazil

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• 作者：de Melo ; Sandra Maria ; Michiyo Takeda ; Alice ; Monkolski ; Alexandre
• 关键词：mayflies ; life cycle ; floodplain lake
• 刊名：Hydrobiologia
• 出版年：2002
• 出版时间：2002
• 年：2002
• 卷：470
• 期：1/3
• 页码：57-62
• 全文大小：300 KB
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Hydrobiology
  Ecology
  
• 出版者：Springer Netherlands
• ISSN：1573-5117

文摘

Nymphs of the Callibaetis willineri Navás, 1932 colonize Eichhornia azurea in Guaraná Lake, a várzea (floodplain) lake of the Upper Paraná River. The plants were sampled monthly from October 1997 to October 1998. Higher abundances of C. willineri coincided with months of higher dissolved oxygen concentrations in the water, suggesting that the nymphs were sensitive to variations in dissolved oxygen. The presence of different size classes and the predominance of small specimens suggest that this species has asynchronous development.