Estimating the global population size and highlighting conservation priority areas for the endangered Titicaca grebe

The Titicaca grebe (Rollandia microptera) is a poorly studied endangered species, only found in the Lake Titicaca watershed of Peru and Bolivia. Population surveys undertaken in the early twenty-first century suggested that the species had declined in number by >70%. We conducted a population survey of the grebe between March and August 2022 in Peru and Bolivia, using both maximum entropy and Bayesian occupancy models to estimate factors affecting habitat suitability for the grebe. We conducted surveys between March and August 2022 in Peru and Bolivia. Contrary to the International Union for Conservation of Nature (IUCN) population estimates of <1,000 individuals, there are likely tens of thousands of individual grebes. The population estimation was sensitive to the type of model used. Distance from shore and fishing intensity were the most significant factors influencing grebe populations. The Reserva Nacional del Titicaca, the only protected area in the lake, covers some of the ..., , , # Estimating the Global Population Size and Highlighting Conservation Priority Areas for the Endangered Titicaca Grebe

[https://doi.org/10.5061/dryad.tqjq2bw63](https://doi.org/10.5061/dryad.tqjq2bw63)

## Description of the data and file structure

This is supplemental material of the article \"Estimating the Global Population Size and Highlighting Conservation Priority Areas for the Endangered Titicaca Grebe\"

This includes the R code used in this analysis, the population data, and the rasters which were produced as part of the output. It also includes a word document with a link to the function used to convert continous rasters to binary rasters which is referenced in the text, but not in the bibliography as it was published as part of a blog rather than as part of a published R package.

## File Explanations

`Rollandia_microptera_points_rounded.csv` - rounded data points of the locations of Titicaca Grebes observed in this study. The locations have been rounded due to the species' ...