Compensation measures

Eradication of American Mink on the Tregor Islands - pink granite coast

Objectives and methodology

The operations are part of an overall project for the ecological restoration of the island to the profile of breeding seabird colonies. In fact, the invasive American Mink has spread on Tomé Island, predating the eggs of the nesting colonies and preventing any nesting. This is dramatic for the islet and could eventually threaten the colonies of the Seven Islands if this species gets there.

This compensation measure is part of the multi-partner programme, set up under the name "Trégor-Gestion-Vison", run by the Fédération départementale des chasseurs des Côtes d'Armor, the Conservatoire du Littoral, the LPO, the commune of Perros-Guirec, Lannion Trégor Communauté and Ailes Marines.

It has three main objectives:



The presence of the American Mink on Tome Island.



The absence of the American Mink on the Sept-Îles National Nature Reserve.


Several individuals on the coast between Perros-Guirec and Penvénan for genetic analysis.

Location of actions


The monitoring is carried out on the whole Tome Island, when tidal conditions allow it.

Planning and Status


Measure put in place

This compensatory measure has been in place since 2017, as follows:

  • Trapping - Eradication: Annual action for 5 years
  • Three-yearly monitoring after the eradication period and for the life of the project

All compensation measures

Follow-up actions

Reduction measures

Accompanying measures