Galway Bay fm newsroom - Inland Fisheries Ireland is to carry out a survey of the Owenriff river in Oughterard later this month.
Concerns have been raised that the introduction of pike in lakes upstream of Lough Corrib has posed a major threat to the pearl mussel in the Owenriff waterway.
Three lakes have already been scheduled for survey by Inland Fisheries Ireland.
This is to be followed by a survey of the Owenriff river in the middle of this month depending on weather and water conditions.
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This examination aims to provide a picture of the fish population structure within the waterways.