Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

What are Populations and Communities?

What are Populations and Communities?

Conservation of Small Populations

Conservation of Small Populations

Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less...

Conservation of Declining Populations

Conservation of Declining Populations

Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Changes in wildlife activity patterns in response to war in Ukraine.

Science (New York, N.Y.)·2026

Same author

The Chornobyl Exclusion Zone as a wildlife refuge: restricted human access shaped mammal recolonization.

Proceedings. Biological sciences·2026

Same author

An integrated population modeling workflow for supporting mesopredator management.

Ecological applications : a publication of the Ecological Society of America·2026

Same author

Map of death: spatially explicit mortality of the grey wolf.

Proceedings. Biological sciences·2025

Same author

Diel Niche of Sympatric Small Mammals Revealed by Year-Round Camera Trapping.

Ecology and evolution·2025

Same author

Spatiotemporal interactions between ocelots and agoutis in Neotropical protected forests.

The Journal of animal ecology·2025

Search research articles

Related Experiment Video

Updated: Oct 11, 2025

A Noninvasive Hair Sampling Technique to Obtain High Quality DNA from Elusive Small Mammals

A Noninvasive Hair Sampling Technique to Obtain High Quality DNA from Elusive Small Mammals

Published on: March 13, 2011

Estimating red fox density using non-invasive genetic sampling and spatial capture-recapture modelling.

Lars K Lindsø^1,2,3, Pierre Dupont⁴, Lars Rød-Eriksen⁵

¹Norwegian Institute for Nature Research, Høgskoleringen 9, 7034, Trondheim, Norway. lars.lindso@ibv.uio.no.

|December 3, 2021

Summary

This summary is machine-generated.

Spatial capture-recapture (SCR) modelling using non-invasive genetic sampling (NGS) revealed lower red fox densities in central Norway. Forest cover positively influenced red fox density in the central area, with varying home-range sizes between sexes and regions.

Keywords:

Density Non-invasive genetic sampling Red fox Spatial capture–recapture

More Related Videos

Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools

Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools

Published on: November 20, 2017

A Method for Quantifying Foliage-Dwelling Arthropods

A Method for Quantifying Foliage-Dwelling Arthropods

Published on: October 20, 2019

Related Experiment Videos

Last Updated: Oct 11, 2025

A Noninvasive Hair Sampling Technique to Obtain High Quality DNA from Elusive Small Mammals

A Noninvasive Hair Sampling Technique to Obtain High Quality DNA from Elusive Small Mammals

Published on: March 13, 2011

Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools

Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools

Published on: November 20, 2017

A Method for Quantifying Foliage-Dwelling Arthropods

A Method for Quantifying Foliage-Dwelling Arthropods

Published on: October 20, 2019

Area of Science:

Ecology
Wildlife Management
Conservation Biology

Background:

Spatial capture-recapture (SCR) modelling is essential for studying elusive wildlife populations.
Non-invasive genetic sampling (NGS) offers a non-disruptive method for collecting genetic data from wildlife.
Red foxes (Vulpes vulpes) are adaptable predators found across diverse habitats.

Purpose of the Study:

To estimate red fox densities and home-range sizes in two Norwegian boreal forest areas using SCR and NGS.
To investigate the influence of forest cover on red fox density.
To assess the effectiveness of SCR modelling combined with NGS for wildlife monitoring.

Main Methods:

Applied spatial capture-recapture (SCR) modelling to non-invasive genetic sampling (NGS) data.
Collected genetic samples from red foxes in central and southern Norway between 2016 and 2018.
Analyzed data to estimate population densities, home-range sizes, and the effect of forest cover.

Main Results:

Red fox densities were lower in central Norway (0.04-0.10 foxes/km²) compared to southern Norway (0.09-0.16 foxes/km²).
Forest cover positively affected red fox density in the central area but not in the southern area.
Mean female home-range sizes were 45 km² (central) and 26 km² (southern); male sizes were 88 km² (central) and 56 km² (southern).
Detection probability was session-dependent and influenced by sampling effort.

Conclusions:

SCR modelling with NGS provides an efficient method for monitoring red fox populations.
Ecological factors like forest cover can be incorporated into SCR models to understand their impact on population dynamics.
The study demonstrates the utility of combining advanced statistical techniques with non-invasive sampling for wildlife research and conservation.