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Related Experiment Video

Updated: May 28, 2026

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles
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Detectability counts when assessing populations for biodiversity targets.

Silviu O Petrovan1, Alastair I Ward, Philip Wheeler

  • 1Centre for Environmental and Marine Sciences, University of Hull, Scarborough Campus, Scarborough, United Kingdom. s.petrovan@hull.ac.uk

Plos One
|October 8, 2011
PubMed
Summary
This summary is machine-generated.

Nighttime line transects improve brown hare (Lepus europaeus) population density estimates. This method offers more accurate data for conservation targets, especially for farmland species with low detectability.

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Published on: October 20, 2019

Area of Science:

  • Ecology
  • Conservation Biology
  • Wildlife Management

Background:

  • Brown hares are declining across European farmland due to agricultural intensification.
  • This species is a priority for UK Biodiversity Action Plan targets.
  • Pastoral landscapes show the greatest declines, suggesting a focus for conservation.

Purpose of the Study:

  • To assess how survey methodology impacts population density estimates for brown hares.
  • To relate these estimates to national biodiversity conservation targets in the UK.
  • To identify efficient survey methods for species with low detectability.

Main Methods:

  • Comparison of daytime versus nighttime line transect surveys for brown hares in pastoral landscapes.
  • Analysis of detection functions and density estimation precision.
  • Evaluation of survey effort and data quality.

Main Results:

  • Nighttime surveys yielded higher detection rates, better detection functions, and more robust density estimates with less effort.
  • Spring densities in the study region (20.6 hares km⁻²) were significantly higher than the reported national average (3.3 hares km⁻²).
  • High encounter rates allowed for detailed analysis at site, season, and year scales.

Conclusions:

  • Survey methodology significantly impacts data quantity and quality for biodiversity monitoring.
  • Nighttime line transects are more efficient and effective for estimating brown hare densities.
  • Trained personnel using optimized methods are recommended for large-scale monitoring of low-detectability species.