Camera trap survey of the Lama Classified Forest

Detection-level camera-trap records and camera deployment intervals from a multispecies survey of terrestrial mammals in the Lama Classified Forest, a semi-deciduous forest remnant in the Dahomey Gap, southern Benin. Twenty-three camera traps operated from June to December 2024 (about 4,256 trap-days), recording 18 mammal taxa. The survey was designed for camera-trap distance sampling, so each detection carries a radial distance and detection angle alongside station coordinates and anthropogenic-gradient covariates.

Usage

lama

Format

A list with two tibbles that share the camera column:

observation: One row per recorded image (7,963 rows, 11 columns): camera (station identifier), species (scientific name), datetime (detection date-time, UTC), distance (radial distance to the animal, m), angle (detection angle, degrees), size (group size), x/y (station coordinates, UTM zone 31N, EPSG:32631), region (survey stratum), d_villages and d_track (distance to the nearest village and track, m).
deployment: One row per camera (23 rows, 11 columns): camera, start and end (install and pull-out date-times, UTC), x/y, fov (field of view, degrees), radius (maximum detection distance, m), height (camera height, m), region, d_villages, d_track.

Source

Adounké, G.R.M., Lecompte, E., Gandaho, S.M., Toyi, M.S., Azihou, A.F., Hugueny, B., Sinsin, B.A., Gaubert, P., & Djagoun, C.A.M.S. (submitted). Camera-trap distance sampling reveals density patterns and anthropogenic drivers of terrestrial mammals in a remnant forest refuge in West Africa. Ecology and Evolution.

Examples

data(lama)
str(lama, max.level = 2)
#> List of 2
#>  $ observation: tibble [7,963 × 11] (S3: tbl_df/tbl/data.frame)
#>  $ deployment : tibble [23 × 11] (S3: tbl_df/tbl/data.frame)
sort(table(lama$observation$species), decreasing = TRUE)
#> 
#>                 Crossarchus platycephalus 
#>                                      1881 
#>                      Tragelaphus scriptus 
#>                                      1560 
#>                      Potamochoerus porcus 
#>                                      1081 
#>                       Philantomba walteri 
#>                                       985 
#>                        Cercopithecus mona 
#>                                       824 
#>                  Genetta pardina/maculata 
#>                                       627 
#>                          Xerus erythropus 
#>                                       374 
#>                               Praomys sp. 
#>                                       271 
#>                      Chlorocebus tantalus 
#>                                       173 
#>                       Atherurus africanus 
#>                                       109 
#> Cercopithecus erythrogaster erythrogaster 
#>                                        31 
#>                      Phataginus tricuspis 
#>                                        11 
#>                       Galagoides demidoff 
#>                                        10 
#>                         Nandinia binotata 
#>                                         8 
#>                      Cricetomys gambianus 
#>                                         6 
#>                   Thryonomys swinderianus 
#>                                         6 
#>                      Atelerix albiventris 
#>                                         4 
#>                        Colobus vellerosus 
#>                                         2