This shiny application was developed to make the Recreation Demand Model (RDM) for Summer Flounder, Black Sea Bass, and Scup directly accessible to Fisheries Managers. If you have questions, please reach out to Kimberly Bastille (kimberly.bastille@noaa.gov) - app developer and Andrew (Lou) Carr-Harris (andrew.carr-harris@noaa.gov) - modeller.
Details and meeting notes from the Recreational Demand Model Decision Support Tool Working Group can be found at NOAA Fisheries.
A full descirption of the model is available - link to lou’s tech memo
Glossary of terms used in the Recreational Fisheries Decision Support Tool.
BagLimit - Possession Limit - The number of possible kept fish.
Season - 2024 date range indicating open fishing seasons.
Length - Minimum length of possible kept fish in inches.
For Hire - Fishing that occurs on party (headboats) or charter vessels.
Private - Fishing that occurs on privately-owned or rented vessels.
Shore - Fishing that occurs from shore.
Change in angler satisfaction ($) -
Angler satisfaction in dollars is computed as the compensating variation
(CV) generated from a change in fishing trip outcomes. CV is a standard
welfare calculation and represents the amount of money an individual
would need to equate their satisfaction in an altered scenario to that
of the original scenario. In other words, it is the compensatory amount
of money needed to hold an angler’s satisfaction constant in the face of
changing trip outcomes. The RDM tool displays the difference between two
separate calculations of CV. The first is the total CV associated with
changes in trip outcomes between fishing conditions in 2022, the
baseline year, and fishing conditions in 2024 under status-quo
regulations (CVSQ_2024). The second is the total CV associated with
changes in trip outcomes between fishing conditions in 2022 and fishing
conditions in 2024 under alternative, user-selected regulations
(CValt_2024). The values of changes in satisfaction ($) displayed in the
RDM tool are (CVSQ_2024 - CValt_2024). Thus, a positive value indicates
that CV under user-selected regulations is higher than CV under
status-quo regulations, while a negative value indicates that CV under
user-selected regulations is lower than CV under status-quo
regulations.
Harvest numbers - Estimated number of fish harvested by anglers.
Harvest pounds - Estimated pounds of fish harvested by anglers.
Release numbers - Estimated number of fish released by anglers.
Release pounds - Estimated pounds of fish released by anglers.
Dead release numbers - Estimated number of dead discarded fish. Calculated as the product of total release numbers and the stock assessment-based discard mortality rate (10% for summer flounder, 15% for black Sea Bass, 15% for scup).
Dead release pounds - Estimated pounds of dead discarded fish. Calculated as the product of total release pounds and the stock assessment-based discard mortality rate (10% for summer flounder, 15% for black Sea Bass, 15% for scup).
Total estimate trips - Estimated number of trips taken by recreational anglers under 2024 user-selected regulations.
Status-quo value (median) - The value of the statistic under status-quo 2024 regulations, computed as the median of the distribution of 100 simulated values.
Alternative option value - The value of the statistic under user-selected alternative 2024 regulations. Computed by multiplying the values in the “Status-quo value (median)” and “% difference from status-quo outcome (median)” columns.
% difference from status-quo outcome (median) - The percent difference in the statistic’s value under status-quo 2024 regulations and user-selected alternative 2024 regulations, ((Xalt_2024 - XSQ_2024)/XSQ_2024)*100), computed as the median of the distribution of 100 simulated percent differences.
% under harvest target (out of 100 simulations) - The number of simulations in which harvest pounds are equal to or less than the harvest target. Harvest targets apply to summer flounder and scup only.