fishmethods (version 1.4-0)

baglimit: Bag Limit Analysis of Marine Recreational Fisheries Statistics Survey Data

Description

Analysis of Marine Recreational Fisheries Statistics data to determine the effect a simulated bag limit would have on the overall reduction in harvest.

Usage

baglimit(intdir = NULL, estdir = NULL, species = NULL, 
  state = NULL, mode = NULL, wave = NULL, styr = NULL, 
  endyr = NULL, bag = NULL)

Arguments

intdir

the path and main directory (in quotes) under which raw intercept sub-directories are stored.

estdir

the path and main directory (in quotes) under which catch/effort sub-directories are stored.

species

10-digit NODC species code. A complete list of species codes is provided at the MRFSS website

state

state(s) code of data to include. A complete list of state codes is provided at the MRFSS website. Atlantic and Gulf States: 23= ME, 33= NH, 25= MA, 44= RI, 9= CT, 36= NY, 34= NJ, 10= DE, 24= MD, 51= VA,37= NC, 45= SC, 13= GA, 12= FL (12

wave

bimothly wave(s) of data to include. Bimothly Waves: 1= Jan-Feb, 2= Mar-Apr, 3= May-Jun, 4= Jul-Aug, 5= Sept-Oct, and 6= Nov-Dec. Any combination of waves can be included in c().

mode

the fishing mode(s) of data to include. Valid codes will depend on year. Years 1982-2004: 3= Shore, 6= Party & Charter Boats, and 7= Private & Rental Boats. Years 2005-present: 3= Shore, 4= Party Boat, 5= Charter Boat, and 7= Private & Rental Boats.

styr

the starting year of data to include.

endyr

the ending year of data to include.

bag

the bag limit(s) to simulate. If multiple bag limits, separate values by commas in c().

Value

• No Bag Limit
  list element containing the table of catch, trip,intercept and harvest information with no bag limit.
• Bag Limit i
  list elements containing the table of catch, trip,intercept and harvest information with each bag limit applied. The number of elements will depend on number of bag limit simulations.
• Results
  the percent reduction in harvest associated with each bag limit.
• Details
  a list element summarizing the selected arguments.

Details

Raw intercept and catch & effort estimates must be extracted using function extractMRFSS before bag limit simulations can be done. Species-specific intercept data and associated effort estimates for each state, year, wave and mode are extracted. Harvest numbers with multiple contributors (CNTRBTRS) are split evenly among the number of contributors (fractional harvest frequencies may result). The analytical steps given in Chapter 7 of Recreational Fisheries Data Users Manual are followed. Estimated total harvest from the No Bag Limit table should be close to the MRFSS harvest estimate.

References

Marine Recreational Fisheries Statistics Survey - Recreational Fisheries Data User's Manual http://www.st.nmfs.noaa.gov/st1/recreational/SurveyMaterials.html

See Also

extractMRFSS

Examples

## Example of a typical specification. Example is for bluefish from New  
## York in 1990 (all waves and modes)- not a working example
baglimit(intdir="C:/Temp",estdir="C:/Temp",species=8835250101,
 state=c(36),mode=c(3,6,7),wave=c(1,2,3,4,5,6),bag=c(5,10,15),
 styr=1990,endyr=1990)