In Franvgls/NeAtlIBTS: R Library for the Northeastern Atlantic & NS IBTS Surveys

library(NeAtlIBTS)

Map of stations in a given survey, year and quarter

• Maps available from the NeAtlIBTS package
• This package produces maps from the HH (& HL) data in DATRAS
• Data can be downloaded directly from DATRAS making use of the icesDATRAS library,
• Or taken from the working directory, where they should be loaded in advance with the DATRAS HH format

Maps of stations in a given survey, year and quarter

par(mfrow=c(1,2))
IBTSNeAtl_map(load=F,leg=F)
IBTSNeAtl_map(load=T,leg=T,legpos = "bottomright",cex.leg = .35)

Maps of stations in a given survey, year and quarter

par(mfrow=c(1,2))
SurveyMap.IBTS("SCOWCGFS",2023,4)
SurveyMap.IBTS("IE-IGFS",2023,4)

• Function to get the data from HH and HL to a data frame to get the maps with splitted lengths (recruits and large ones)
• Produces a map with the selected species (esp="HAD" in the example) to check that it is working. Function SplitLengthsESP will produce the map for the species and survey, working for only one specie.

SplitLengths(datSurvey ="SCOWCGFS",dtyear= 2023,dtq=4,esp = "HAD",plot=T,out.dat = FALSE)

• The list of species included and the length split parameters are taken from file SpeciesCodes part of the NeAtlIBTS package, the lengthsplit value gives the split limit between small and large, it is in cm but converted to mm during the split lengths process

head(SpeciesCodes)

• the function also produces the data for the whole set of species (in present in the survey)

head(dplyr::filter(SplitLengths("SCOWCGFS",2023,4,plot=F,out.dat=T),Survey=="SCOWCGFS"))

• The function SplitLengthsESP produces from DATRAS HH and HL records the map of distribution of one species in a survey (year and quarter) with two length ranges (or just one if L_Split=NA)

SplitLengthsESP(datSurvey = "PT-IBTS",dtyear=2023,dtq=4,L_Split = 20,legpos = "bottomleft")

Franvgls/NeAtlIBTS documentation built on April 26, 2024, 4:18 a.m.