CreelMN: Results of a large number of creel surveys in Minnestoa...

In FSAdata: Data to Support Fish Stock Assessment ('FSA') Package

Results of a large number of creel surveys in Minnestoa lakes.

Description

The species targeted, number of fish harvested, and number of individuals harvesting that number of that species of fish from a large number of surveys on Minnesota Lakes, 1980-1996.

Format

A data frame of 14550 observations on the following 2 variables:

species

species of fish that was targeted.

harvest

number of fish of that species harvested by one angler.

Topic(s)

• Other

Source

From tables in Cook, M.F., T.J. Goeman, P.J. Radomski, J.A. Younk, and P.C. Jacobson. 2001. Creel limits in Minnesota: A proposal for change. Fisheries 26:19-26. CSV file

Examples

data(CreelMN)
str(CreelMN)
head(CreelMN)
levels(CreelMN$species)

## ONLY RUN IN INTERACTIVE MODE
## Not run: 
  require(FSA)
  wae <- filterD(CreelMN,species=="WAE")
  ( waetbl <- table(wae$harvest) )
  ( waeptbl <- prop.table(waetbl)*100 )
  ( waercum <- rcumsum(waeptbl) )
  op <- par(mfrow=c(1,2),mar=c(3.5,3.5,0.5,0.5),mgp=c(2,0.5,0))
  barplot(waeptbl,xlab="Number of Walleye Harvested",ylab="Percentage of Individuals")
  barplot(waercum,xlab="Minimum Number of Walleye Harvested",ylab="Percentage of Individuals")
  par(op)       
  ( ttlwae <- sum(wae$harvest) )                 
  wae$svd5 <- wae$harvest-5             # Used to determine the number of fish                
  xtabs(~svd5,data=wae)                 #   saved if limit was reduced to 5.
  ( svd5 <- sum(wae$svd5[wae$svd5>0]) ) #   Only sum positive numbers (i.e., saved)
  round(svd5/ttlwae*100,1)              # Show as a percentage

  wae$svd1 <- wae$harvest-1             # same but if reduced to 1 bag.
  xtabs(~svd1,data=wae)
  ( svd1 <- sum(wae$svd1[wae$svd1>0]) )
  round(svd1/ttlwae*100,1)

## End(Not run)

FSAdata documentation built on Aug. 24, 2023, 5:06 p.m.