Do eel grass beds and salt marsh borders act as preferential nurseries and spawning grounds for fish? An example of the Mira estuary in Portugal

摘要: Abstract The fish communities of the Mira estuary (Portugal) have been studied as a whole since 1986. It was possible to identify two different types habitat that act nursery areas and spawning grounds for large number species — eel grass beds salt-marsh-bordered zone. importance these habitats is due, not only present, but also their abundance. However, extend over small surface in estuary, salt marshes become vital marine fish, especially those with economical value. As several major modifications are planned estuarine bed valley near future, suggestions given order preserve ecosystem equilibrium.