ducknest {Distance}

Ducknest line transect survey data

Description

Simulated line transect survey of duck nests, designed to reproduce the data of Figure 2 in Anderson and Pospahala (1970).

Format

A data.frame with 534 rows and 7 variables

• Region.Label strata names (single stratum in this instance)

• Area size of refuge (0 in this case, actual size 60km^2)

• Sample.Label transect ID

• Effort length of transects (km)

• object nest ID

• distance perpendicular distance (m)

• Study.Area name of wildlife refuge

Details

The Monte Vista National Wildlife Refuge is in southern Colorado in the USA at an altitude of roughly 2400m.

Source

Simulated data, from the distance sampling introductory course, Centre for Research into Ecological & Environmental Modelling, University of St Andrews.

References

Anderson, D. R., and R. S. Pospahala. 1970. Correction of bias in belt transect studies of immotile objects. The Journal of Wildlife Management 34 (1): 141–146. doi:10.2307/3799501