bbc.com 30 Apr, 2021 12:30 am

tracking the fish that leave the River Roe

tracking the fish that leave the River Roe
A new Loughs Agency project tracks fish as they make their way from Irish rivers out to the sea.

'The majority don't come back' - tracking the fish that leave the River Roe 'The majority don't come back' - tracking the fish that leave the River Roe Close For every hundred fish that leave the River Roe in County Londonderry, fewer than one in three will return to spawn in the years ahead.At the same time receivers have been placed at the mouth of the river and in Lough Foyle which the River Roe runs into.More than 100 receivers have been strung out every 400 metres to create a giant digital fence, which will register every time a tagged fish crosses over it.There are a lot of different reasons for that, but there is also a big gap in the science, and it is hoped that this project, will begin to plug that gap.

Juvenile salmon, known as smolts, have a tiny transmitter inserted.Published 51 minutes ago Section BBC News Subsection Northern Ireland

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