The Pearl Mussel Project has sent 365 contract offers to farmers in the eight project regions in Counties Cork, Donegal, Galway, Kerry, and Mayo.
This follows a review of 462 expression-of-interest forms.
Farmers have been urged to accept offers as soon as possible.
The offers include a farm plan which shows farm details and outlines potential payments.
But the actual payment to farmers will depend on the environmental quality of their farms, because the project is a results-based programme.
There will be further recruitment into the programme early next year, including any new expressions of interest received between now and then, and re-assessment of this year’s unsuccessful applicants.
The project aims to ensure long term co-existence of farming and freshwater pearl mussel in eight priority catchment areas in the West of Ireland.