based on analyses of data from the database the board of incopesca costa ricas national fisheries authority recognized the need to permanently remove shrimp boats from the coastal zone as requested by fishers the negotiations leading up to this action took several years but in incopesca temporarily banned shrimp boats from the tarcoles marf with only hookandline fishing being allowed the study of the effects of the ban showed recovery in the two most exploited species snapper and shrimp