Zigzag survey designs in line transect sampling

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56 Citations (Scopus)

Abstract

Zigzag survey lines are frequently used in shipboard and aerial line transect surveys of animal populations. Analysis proceeds assuming that coverage probability through the survey region is uniform. We show that the two types of zigzag design that are in wide use. do not generally have this property, and explore the degree of bias in abundance estimates that can be anticipated. We construct a zigzag design for convex survey regions that has even coverage probability with respect to distance along a design axis. We also provide Horvitz-Thompson estimators that allow coverage probability to vary by location through the survey region.

Original languageEnglish
Pages (from-to)443-461
Number of pages19
JournalJournal of Agricultural, Biological and Environmental Statistics
Volume9
DOIs
Publication statusPublished - Dec 2004

Keywords

  • automated design algorithms
  • coverage probability
  • sighting surveys
  • survey design
  • systematic designs
  • zigzag designs
  • ABUNDANCE
  • DENSITY
  • POPULATIONS
  • MODELS
  • SEA

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