Debber - Frequently Asked Questions
- How do I use the results of this service?
Do not blindly use "best estimates" such as the median!
These values are subject to considerable uncertainty, which can be seen from the percentiles shown in the table and from the spread in model results in ensemble analyses.
Instead, we recommend you use all information - best estimates and their uncertainty - ideally in combination with new data specific to your species.
For instance, you can use the provided information to set plausible ranges (e.g., the 2.5th - 97.5th percentile) for the primary DEB parameters during calibration to new data,
or use the probability distribution (multivariate normal; mean and covariance matrix downloadable underneath the table) as prior in a Bayesian analysis. If you do not have additional data
on your species, we suggest you use an ensemble of models, constructed by drawing from the parameter probability distribution.
- Why do the parameter values provided here differ from the values given for the same species in the Add-my-Pet collection?
When analyzing the DEB parameters across all taxa, we do not only expect phylogenetic varation (parameters of closely related species are similar,
those of distantly related species diverge), but also phenotypic variation: "observed" parameter values
can deviate from their expected value (the mean of the species) due to intraspecific variation, sampling error,
and parameter estimation uncertainty. Thus, AmP parameters are assumed uncertain (and this uncertainty is quantified).
As a result, Debber's best estimate for a species will not only reflect its AmP values, but also circumstancial information
- in particular, AmP values of closely related taxa.
- Which typified models are supported?
Typified models use all parameters of the standard model, which retain their original interpretation, and add additional parameters to describe
specific phenomena (e.g., the onset of particular behaviour as a maturation or time threshold). Therefore, the estimates of the standard DEB parameters
provided here can be used for typified models too. If parameters specific to your typified model of choice are not estimated themselves,
you will need to fill these in on your own. Debber results ("Model behaviour", "Implied properties"),
will use the "abj" typified model, unless the selected taxon is a non-egg-laying mammal (that is, the taxon belongs to any order from
class Mammalia, except Monotremata). For non-egg-laying mammals, Debber will account for fetal development by using the "stf" typified model.