CreelMN {FSAdata}R Documentation

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)

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.

Examples

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

## ONLY RUN IN INTERACTIVE MODE
## Not run: 
  require(FSA)
  wae <- Subset(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)


[Package FSAdata version 0.3.7 Index]