% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/data.R
\docType{data}
\name{eisenia_growth}
\alias{eisenia_growth}
\title{Simulated Eisenia fetida Growth Data}
\format{
A data frame with 273 rows and 3 columns:
\describe{
\item{id}{Individual identifier (integer, 1--21)}
\item{time}{Observation time in days (0, 7, 14, \ldots, 84)}
\item{length}{Structural length in cm (= \eqn{V^{1/3}}), with
measurement error}
}
}
\source{
Simulated from the standard DEB model (Kooijman, 2010,
Eqs. 2.4--2.6) with parameters:
\eqn{\{p_{Am}\} = 5.0} J/d/cm\eqn{^2},
\eqn{[p_M] = 0.5} J/d/cm\eqn{^3},
\eqn{\kappa = 0.75},
\eqn{v = 0.2} cm/d,
\eqn{[E_G] = 400} J/cm\eqn{^3}.
Individual variation: \eqn{\{p_{Am}\}_j \sim
  \mathrm{LogNormal}(\log 5.0,\, 0.1)},
\eqn{L_{0,j} \sim \mathrm{LogNormal}(\log 0.1,\, 0.05)}.
Observation error: \eqn{\sigma_L = 0.015} cm.
}
\usage{
eisenia_growth
}
\description{
Simulated growth dataset for 21 individuals of the earthworm
\emph{Eisenia fetida} measured weekly over 12 weeks under controlled
laboratory conditions (20 °C, ad libitum feeding), following a
standard OECD 222 test protocol design.  DEB parameters are based on
the \emph{E. fetida} entry in the Add-my-Pet collection (AmP;
Marques et al., 2018).  Individual variation in \eqn{\{p_{Am}\}} was
drawn from a lognormal distribution with CV \eqn{\approx} 10\\%, and
Gaussian measurement error \eqn{\sigma_L = 0.015} cm was added to
the structural length.
}
\examples{
data(eisenia_growth)
head(eisenia_growth)
}
\references{
Kooijman, S.A.L.M. (2010). \emph{Dynamic Energy Budget Theory for Metabolic
Organisation}. 3rd edition. Cambridge University Press.
\doi{10.1017/CBO9780511805400}

Marques, G.M., Augustine, S., Lika, K., Pecquerie, L., Domingos, T.
and Kooijman, S.A.L.M. (2018). The AmP project: comparing species on
the basis of dynamic energy budget parameters. \emph{PLOS Computational
Biology}, 14(5), e1006100. \doi{10.1371/journal.pcbi.1006100}

OECD (2016). Test No. 222: Earthworm Reproduction Test (\emph{Eisenia
fetida} / \emph{Eisenia andrei}). OECD Guidelines for the Testing of
Chemicals.
}
\keyword{datasets}
