new version E-SURGE released...

announcements (new versions, changes, bugs, installation problems...) related to M-SURGE, E-SURGE and U-CARE

new version E-SURGE released...

Postby egc » Thu Apr 12, 2007 9:20 am

The biometry group in Montpellier is happy to announce a new program called E-SURGE 1.0.6

E-SURGE is available for download at:

http://ftp.cefe.cnrs.fr/biom/Soft-CR/Last_Update

The procedure to install the program is described in the readme file at the same address: readme-install 30.03.07.txt

We introduce a new program called E-SURGE for fitting models to capture-recapture data. Built upon the concepts developed in program M-SURGE (Choquet et al. 2004), this software contains new features allowing to build a wider range of multistate models and the recently
developed multievent models (Pradel, 2005). These last models generalize the multistate models by taking into account uncertainty in state assessment. The generalization goes through the replacement of the traditional encounter probabilities with “event” probabilities and the
introduction of a new type of parameters, the initial state probabilities.

Independently of the multievent generalization, E-SURGE adds more flexibility to model designing by allowing the decomposition of transitions into successive steps.

This program allows particular models like

1. Decomposition of dispersal as a two-step process (Grosbois & Tavecchia 2003): Does the animal disperse? If it does, where does it settle? This feature allows handling fidelity and direction of movement independently.

2. Multievent formalization of a model with two classes of catchability (Pledger 2000, Pradel 2005): this example serves to introduce the initial state probabilities, which estimate here the proportions of individual belonging to each class of catchability.

3. Implementation of the memory model (Brownie et al. 1993, Pradel 2005) as a multievent model: the event matrices (a generalization of the capture probabilities) make the link between what is observed (the events) and the underlying states.

and many more models …
egc
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