The use of nursery areas by juvenile fish in a temperate estuary, Portugal

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• 作者：Filipe Martinho ; R. Leit茫o ; J. M. Neto ; H. N. Cabral ; J. C. Marques and M. A. Pardal
• 关键词：Mondego river ; Estuarine fish ; Nursery areas ; Habitat use ; Eutrophication
• 刊名：Hydrobiologia
• 出版年：2007
• 出版时间：August, 2007
• 年：2007
• 卷：587
• 期：1
• 页码：281-290
• 全文大小：335.0 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

The nursery role of the Mondego estuary for marine fish species was studied between June 2003 and May 2004. The spatial and temporal distribution and abundance patterns of 0-group Dicentrarchus labrax (Linnaeus, 1758), Platichthys flesus (Linnaeus, 1758) and Solea solea (Linnaeus, 1758) were analyzed based on monthly sampling surveys in five stations along the estuarine gradient. Fishing took place during the night at low water of spring tides, using a 2 m beam trawl. The spatial patterns of estuarine colonization were different according to species. D. labrax showed a wider distribution, but the main nursery ground was the same as for S. solea. Highest densities of S. solea juveniles were found in oligohaline areas, with muddy bottoms and high benthic invertebrates availability, while P. flesus occurred mainly in the sandy uppermost areas. D. labrax was found in both these areas. Fish abundance in the estuary mainly reflected seasonal changes.