FlexParamCurve (version 1.4-3)

penguin.data: Field data on growth of little penguins $Eudyptula minor$

Description

The penguin.data data frame has 2244 rows and 11 columns of records of the measured masses for little penguin chicks between 13 and 74 days of age collected at Philip Island, Victoria, Australia in 2000 and 2002 (see Chiaradia & Nisbet 2006).

Usage

data(penguin.data)

source

Chiaradia, A. & Nisbet, I.C.T. (2006) Plasticity in parental provisioning and chick growth in Little Penguins $Eudyptula minor$ in years of high and low breeding success. Ardea, 94, 257-270.

Details

Data were collected as outlined in Chiaradia & Nisbet (2006). Penguin chicks are generally considered to exhibit a double-Gompertz growth form.Please contact Andre Chiaradia ([e-mail]) for use in collaborations.

Examples

require(stats); require(graphics)
data(penguin.data)
modpar(penguin.data$ckage, penguin.data$weight, pn.options = "myoptions")
plot(weight ~ ckage, data = penguin.data, subset = bandid == penguin.data$bandid[1],
     xlab = "Chick age (day)", las = 1,
     ylab = "Chick mass (g)",
     main = "penguin.data and fitted curve (Chick #307 only)")
fm1 <- nls(weight ~ SSposnegRichards(ckage,Asym=Asym,K=K,Infl=Infl, RAsym=RAsym,modno=31, pn.options= "myoptions"),
           data = penguin.data, subset = bandid == penguin.data$bandid[1])
ckage <- seq(0, 74, length.out = 101)
lines(ckage, predict(fm1, list(ckage = ckage)))