Compensation measures

Eradication of American Mink on the Trégor Islands – Pink Granite Coast

Objectives and methodology

The operations are part of a global ecological restoration project for the island with the profile of nesting seabird colonies. Indeed, the American Mink, an invasive species, has spread to the Tomé islet, predating the eggs of the nesting colonies and preventing any nesting. This is dramatic for the islet and could ultimately threaten the colonies of the Seven Islands if this species reached that point.

This compensation measure is part of the multi-partnership program, set up under the name “Trégor-Gestion-Vison”, supported by the Departmental Federation of Côtes d’Armor Hunters, the Conservatoire du Littoral, the LPO, the commune of Perros-Guirec, Lannion Trégor Community and Ailes Marines .

It has three main objectives:



The presence of the American Mink on the island of Tomé.



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 analyses.

Location of actions


Monitoring is carried out across the entire Tomé Island, when tidal conditions permit.

Schedule and Status


Measure implemented

This compensatory measure has been in place since 2017, according to the following methods:

  • Trapping – Eradication: Annual action for 5 years
  • Three-year monitoring after the eradication period and for the lifespan of the project

All compensation measures

Follow-up measures

Reduction measures

Accompanying measures