Growth model of the reared sea urchin Paracentrotus ... - SciViews

List of symbols
s Parameter of the envelope model. Slope of the linear relationship
l = s·(1 - τ). (dimensionless). See also l.
SCT Standard competence test. Determine if sea urchin larvae are ready to
metamorphose; adapted from Gosselin & Jangoux, 1996).
SIW Standard immersed weight. The apparent weight of a sea urchin in
seawater, standardized according to eq. 18 (in g).
t Chronological time with an arbitrary origin (in days).
t' Relative chronological time, that is, with a defined origin (usually
corresponding to the metamorphosis event) (in days).
t0
Time at a defined origin (usually corresponding to the
metamorphosis event) (in days).
tM Metabolic or physiologic time, that is, a time-scale that is modulated
by environmental parameters in the same proportions as they change
the metabolic rate of the organism (in days).
W A measure of the size of an animal using a weight measurement (in
g).
Y A measure of the size of an animal, using any kind of measurement.
Note that y corresponds to any kind of dependent variable, while Y is
a dependent variable that expresses the size of an individual, or of a
population (unit si context-dependent).
Y' Relative size: increase of the size from a defined initial value (at
birth, at metamorphosis…) Y0 to the current value Y (same unit as Y).
Y0 The size of an animal at time t = t0 (usually at birth or
metamorphosis) (same unit as Y).
Y∞ Maximum asymptotic size (determinate growth) (same unit as Y).
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