 It cited increases in abundance and biomass of barndoor skate observed during surveys since 1993, which had become quite rapid by that time.In 1994, the World Conservation Union had listed the barndoor skate as "vulnerable" under the 1994 Categories and Criteria, but in 2003, it reassessed the species as "endangered" on the IUCN Red List.Each year, the National Oceanic and Atmospheric Administration (NOAA) estimates current population levels for a variety of aquatic species of special interest, and releases an annual report showing the progress being made to reduce harvesting of overfished species.