Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Conservation of Declining Populations02:07

Conservation of Declining Populations

13.5K
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.
13.5K
Conservation of Small Populations02:04

Conservation of Small Populations

17.6K
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...
17.6K
Population Growth00:57

Population Growth

29.3K
Population size is dynamic, increasing with birth rates and immigration, and decreasing with death rates and emigration. In ideal conditions with unlimited resources, populations can increase exponentially, which plots as a J-shaped growth rate curve of population size against time. This type of curve is characteristic of newly-introduced invasive species, or populations that have suffered catastrophic declines and are rebounding.
29.3K
Habitat Fragmentation02:31

Habitat Fragmentation

21.7K
Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
21.7K
Threats to Biodiversity01:50

Threats to Biodiversity

27.6K
There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
27.6K
Testing a Claim about Mean: Unknown Population SD01:21

Testing a Claim about Mean: Unknown Population SD

6.4K
A complete procedure of testing a hypothesis about a population mean when the population standard deviation is unknown is explained here.
Estimating a population mean requires the samples to be approximately normally distributed. The data should be collected from the randomly selected samples having no sampling bias. There is no specific requirement for sample size. But if the sample size is less than 30, and we don't know the population standard deviation, a different approach is used;...
6.4K

You might also read

Related Articles

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

Sort by
Same author

Seasons of death: patterns of predation on wild lemurs and other fauna by endemic and introduced predators.

Folia primatologica; international journal of primatology·2024
Same author

Aquatic and Maritime Drowning Deaths Among Undocumented Migrants.

JAMA·2024
Same author

Tuberculosis in Lemurs and a Fossa at National Zoo, Madagascar, 2022.

Emerging infectious diseases·2023
Same author

Microbial rewilding in the gut microbiomes of captive ring-tailed lemurs (Lemur catta) in Madagascar.

Scientific reports·2022
Same author

Impact of the COVID-19 Pandemic on Primate Research and Conservation.

Animals : an open access journal from MDPI·2022
Same author

Gut microbiota of ring-tailed lemurs (Lemur catta) vary across natural and captive populations and correlate with environmental microbiota.

Animal microbiome·2022

Related Experiment Video

Updated: Mar 8, 2026

Sampling and Analysis of Animal Scent Signals
14:59

Sampling and Analysis of Animal Scent Signals

Published on: February 13, 2021

5.3K

Rapid Decrease in Populations of Wild Ring-Tailed Lemurs (Lemur catta) in Madagascar.

Marni LaFleur1, Tara A Clarke, Kim Reuter

  • 1Department of Anthropology, University of California San Diego, La Jolla, CA, USA.

Folia Primatologica; International Journal of Primatology
|January 13, 2017
PubMed
Summary

The critically endangered ring-tailed lemur (Lemur catta) population has declined by over 95% since 2000. Urgent conservation is needed as only 2,220 individuals remain across 32 monitored sites.

More Related Videos

Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling
20:36

Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling

Published on: July 4, 2007

9.2K
A Noninvasive Hair Sampling Technique to Obtain High Quality DNA from Elusive Small Mammals
07:40

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

Published on: March 13, 2011

21.5K

Related Experiment Videos

Last Updated: Mar 8, 2026

Sampling and Analysis of Animal Scent Signals
14:59

Sampling and Analysis of Animal Scent Signals

Published on: February 13, 2021

5.3K
Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling
20:36

Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling

Published on: July 4, 2007

9.2K
A Noninvasive Hair Sampling Technique to Obtain High Quality DNA from Elusive Small Mammals
07:40

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

Published on: March 13, 2011

21.5K

Area of Science:

  • Primate conservation biology
  • Wildlife population dynamics
  • Madagascar biodiversity

Background:

  • Lemurs are the world's most threatened mammal group.
  • Lemur catta (ring-tailed lemur) is an iconic species facing severe anthropogenic pressures.
  • Understanding current population status is critical for effective conservation.

Purpose of the Study:

  • To estimate the remaining wild population of Lemur catta.
  • To identify threats and assess population trends across the species' range.
  • To inform urgent conservation strategies for ring-tailed lemurs.

Main Methods:

  • Population estimates synthesized from 32 sites using primary and secondary data.
  • Analysis of local extinction events in relation to protected areas.
  • Comparison of current population estimates with historical data.

Main Results:

  • Approximately 2,220 ring-tailed lemurs remain across the 32 surveyed sites.
  • Local extinctions occurred in at least 12 sites, with higher rates in unprotected areas.
  • Population decline may exceed 95% since the year 2000.

Conclusions:

  • Ring-tailed lemur populations are in rapid decline, facing local extinctions.
  • Habitat loss, hunting, and the illegal pet trade are primary drivers of this decline.
  • Immediate funding and conservation interventions are essential for species survival.