The right to do something (in this case, to catch fish) is exclusive to the bolder(s) of the right; that is, the holders can exclude others without the right from catching fish in the fishery. That is, the owner of a piece of land has the exclusive right to farm the land and can exclude others from using the land without the owners permission. OECD (1996)
EXCLUSIVE RIGHTS
Meaning of EXCLUSIVE RIGHTS in English
Fishery English glossary. Английский глоссарий рыболовства . 2012