Ages, lengths, and maturity for female Cabezon from Oregon.

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Description

Ages, lengths, and maturity for female Cabezon (Scorpaenichthys marmoratus) from Newport and Depoe Bay, Oregon.

Format

A data frame with 525 observations on the following 5 variables.

date

Date fish was collected

length

Total length (cm)

age

Otolith age

maturity

Maturity state (Immature or Mature)

stage

Stage of maturity (1:Immature, 2:Maturing, 3:Mature, 4:Fertilized, 5:Ripe, 6:Spent, 7:Resting)

Topic(s)

  • Maturity

  • Growth

  • von Bertalanffy

Source

Actual data obtained directly (from Bob Hanna) from Hannah, R.W, M.T.O. Blume, and J.E. Thompson. 2009. Length and age at maturity of female yelloweye rockfish (Sebastes rubberimus) and cabezon (Scorpaenichthys marmoratus) from Oregon waters based on histological evaluation of maturity. Oregon Department of Fish and Wildlife, Information Reports 2009-04. [Was (is?) from http://www.dfw.state.or.us/mrp/publications/docs/Info200904_YlwEyeRF_Maturity.pdf.]

Examples

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data(Cabezon)
str(Cabezon)
head(Cabezon)
op <- par(mfrow=c(2,2),pch=19)
plot(length~age,data=Cabezon,ylab="Total Length (cm)",xlab="Age")
hist(Cabezon$length,xlab="Total Length (cm)",main="")
tbl1 <- xtabs(~age+maturity,data=Cabezon)
(ptbl1 <- prop.table(tbl1,margin=1))
plot(ptbl1[,2]~as.numeric(row.names(ptbl1)),type="l",xlab="Age",ylab="Proportion Mature")
tbl2 <- xtabs(~length+maturity,data=Cabezon)
(ptbl2 <- prop.table(tbl2,margin=1))
plot(ptbl2[,2]~as.numeric(row.names(ptbl2)),type="l",xlab="Length",ylab="Proportion Mature")
par(op)

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