TRIM
TRIM (TRends and Indices for Monitoring data) is a software package used to determine species' population trends. It allows for missing counts using estimation, and yields yearly indices and standard errors using Poisson regression. The latest version can be downloaded from the web site of Statistics Netherlands.
BirdSTATs v 1.1
Species Trends Analysis Tool (STAT) for European bird data (including TRIM 3.54) can be downloaded here(1,61MB).
The Species Trends Analysis Tool for birds (BirdSTATs) is an open source Microsoft Access database for the preparation and statistical analysis of bird counts data in a standardised way. The BirdSTATs tool is programmed to use and automatically run the program TRIM (TRends and Indices for Monitoring data) in batch mode to perform the statistical analysis for series of bird counts in the dataset. In this way it is suitable for use in all European countries participating in the Pan European Common Bird Monitoring Scheme (PECBMS). Using the BirdSTATs tool results in standardised indices that are used as subsets by the PECBMS for the calculation of overarching European wild bird indicators.
The BirdSTATs tool is developed at the request of the Pan European Common Bird Monitoring Scheme (PECBM) by Bioland Informatie. Designing and programming of the tool is funded by the European Commission through British Royal Society for the Protection of Birds (RSPB).
The fact that this tool is an open source database allows users to adapt or expand the tool to their own demands. The tool is also usable for other species groups.
Characteristics of the tool:
- it is capable of importing different kinds of counts data
- it enables stratification of count sites and selection of subsets of counts data
- it produces standardised TRIM input and command files and runs TRIM in batch mode for all or a selection of strata
- it collects the output of the batched TRIM runs in a convenient and standardised format to fit the requirements of PECBMS
15.07.2004