Chapter 6. General Principles of Estimation

  1. Michael J. Conroy and
  2. John P. Carroll

Published Online: 10 FEB 2009

DOI: 10.1002/9781444303155.ch6

Quantitative Conservation of Vertebrates

Quantitative Conservation of Vertebrates

How to Cite

Conroy, M. J. and Carroll, J. P. (2009) General Principles of Estimation, in Quantitative Conservation of Vertebrates, Wiley-Blackwell, Oxford, UK. doi: 10.1002/9781444303155.ch6

Author Information

  1. University of Georgia, USA

Publication History

  1. Published Online: 10 FEB 2009
  2. Published Print: 9 JAN 2009

ISBN Information

Print ISBN: 9781405190985

Online ISBN: 9781444303155



  • estimation methods used by conservation biologists;
  • census versus estimate;
  • double sampling;
  • conservation studies and monitoring programs;
  • “closed” versus “open” estimation;
  • estimating abundance and population parameter principles;
  • estimation approaches accounting for incomplete and variable detection


This chapter contains sections titled:

  • Census versus estimate

  • Indices

  • General relationship between counts and abundance or occupancy

  • “closed” versus “open” estimation

  • Summary