get_tb: Scaled length and age at birth
In Echinophoria/DEB_output: Dynamic Energy Budget exploration tools

Usage Arguments Value Note Author(s) References See Also Examples

1	get_tb(p, f)

`p`	A named list resulting from the importing of DEB parameters using the function `get_DEB_pars`. Alternatively a vector containing the DEB parameters (g, k, v_Hb)) in the same order. For symbol meaning check code and documentation of `get_DEB_pars`
`f`	Scaled functional response at which the variables are to be calculated (see Kooijman 2010 for a definition of f). It is a value between 0 and 1. For embryo development this f relates to the condition of the mother and energy provision (initial reserves in the egg) and not to the food in the environment during embryo development

This function return a named list containing scaled lengths and ages at the different key stages (birth, metamorphosis, puberty, etc)

`lb`	scaled length at birth, start of exogenous feeding
`tb`	scaled age at birth, start of exogenous feeding

Scaled values obtained here can be unscaled for further use. See examples. For further info on temperature corrections see Kooijman 2010 and t_corr

Antonio Aguera. BioMar, ULB, Bruxelles, Belgium

Aguera A, Collard M, Jossart Q, Moreau C, Danis B (2015) Parameter Estimations of Dynamic Energy Budget (DEB) Model over the Life History of a Key Antarctic Species: The Antarctic Sea Star Odontaster validus Koehler, 1906 (ed Thuesen E V.). Plos One, 10, e0140078.

DEBlab, http://http://www.bio.vu.nl/thb/deb/deblab/

Kooijman SALM (2010) Dynamic Energy Budget theory for metabolic organisation, Third edn. Cambridge University Press, Cambridge, 509 pp.

Lika K, Kearney MR, Freitas V et al. (2011) The covariation method for estimating the parameters of the standard Dynamic Energy Budget model I: Philosophy and approach. Journal of Sea Research, 66, 270_277.

Lika K, Kearney MR, Kooijman SALM (2011) The covariation method for estimating the parameters of the standard Dynamic Energy Budget model II: Properties and preliminary patterns. Journal of Sea Research, 66, 278_288.

t_corr get_tj get_tp get_DEB_pars

### get the parameters for the species
pars = get_DEB_pars('results_Odontaster_validus.mat')

### get scaled lengths and ages at f=1 (no food limitation)
f = 1
ltr = get_tb(pars, f)

### unscaling lengths to structural lengths (see Kooijman 2010 for definition of structural length)
Lb = ltr$lb * pars$L_m        # cm, structural length at birth

### unscaling ages and correcting for temperature
ab = ltr$tb / pars$k_M        # d, age at birth for the reference temperature (T_ref in pars) (in days from fertilization)
T_C = t_corr(pars, 285)       # -, correction factor to get pars at 285K
aTb = ab / T_C                # d, age at birth when development occurs at a temperature of 285K.