pesa: Satellite telemetry locations of male pectoral sandpipers

In nomads: Nomadic Pectoral Sandpiper Movement Data

Satellite telemetry locations of male pectoral sandpipers

Description

A processed dataset of Argos satellite telemetry locations for male pectoral sandpipers, Calidris melanotos, tracked during the Arctic breeding season.

Usage

pesa

Format

A data.table with 129536 rows and 7 variables. If data.table is installed when the dataset is loaded, pesa is returned as a keyed data.table.

id

Individual male identifier.

time

Timestamp of the Argos location fix, as POSIXct in UTC.

latitude

Latitude in decimal degrees.

longitude

Longitude in decimal degrees.

site_id

Residency site identifier. Non-site id points are NA

locationClass

Argos location class.

Details

Use-sites were identified in the original analysis using density-based spatial clustering (DBSCAN). This dataset provides a useful benchmark because the original DBSCAN parameters, \epsilon and MinPts, were tuned using a subset of males for which the expected classification was known. Additionally all identified use-sites were also checked visually, with a small number of manual corrections applied where needed. See Kempenaers and Valcu (2017) \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1038/nature20813")} for details.

Source

Kempenaers, B. and Valcu, M. (2017). Breeding site sampling across the Arctic by individual males of a polygynous shorebird. Nature. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1038/nature20813")}

Data and analysis code were made available at \Sexpr[results=rd]{tools:::Rd_expr_doi("10.17605/OSF.IO/VX2MK")} under an Open Data Commons Open Database License.

References

Kempenaers, B. and Valcu, M. (2017). Breeding site sampling across the Arctic by individual males of a polygynous shorebird. Nature. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1038/nature20813")}

Examples

data(pesa)

head(pesa)
dim(pesa)
names(pesa)

# Number of locations per bird
table(pesa$id)

# Time span covered by the dataset
range(pesa$time)

nomads documentation built on May 30, 2026, 9:13 a.m.