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

Population Growth00:57

Population Growth

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.
Limits to Natural Selection01:38

Limits to Natural Selection

Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.
Modeling with Differential Equations01:25

Modeling with Differential Equations

Population dynamics can be described mathematically by considering the population size P(t) as a function of time. The rate of change of the population is then represented by the derivative of P(t). A simple assumption is that the rate of growth is proportional to the size of the population itself. This leads to an exponential growth model, where the population increases rapidly without bound. While this is a useful first approximation, it does not reflect realistic long-term...
Exponential Equations for Modeling Growth01:26

Exponential Equations for Modeling Growth

Exponential models are essential for describing rapid, multiplicative changes in natural systems, such as population growth. When a population doubles at regular intervals, the process can be modeled using a suitable base. For instance, a bacterial culture that doubles every three hours follows the model n(t)=n0⋅2t/3, where n(t) is the population at the time t.A more general model uses the natural base e, especially for continuous growth. This takes the form n(t)=n0⋅ert, where r is the relative...
Conservation of Declining Populations02:07

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.
Social Traps01:41

Social Traps

Social traps are negative situations where people get caught in a direction or relationship that later proves to be unpleasant, with no easy way to back out of or avoid. The concept was orignally introduced by John Platt who applied psychology to Garrett Hardin's "Tragedy of the Commons", where in New England herd owners could let their cattle graze in the common ground. This situation seems like a good idea, but an individual could have an advantage. If they owned more cows, the larger...

You might also read

Related Articles

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

Sort by
Same author

Predicting and influencing PrEP use: the role of motivational and attitudinal factors.

AIDS care·2023
Same author

Migraine-Associated Common Genetic Variants Confer Greater Risk of Posterior vs. Anterior Circulation Ischemic Stroke☆.

Journal of stroke and cerebrovascular diseases : the official journal of National Stroke Association·2022
Same author

Viral-like Reaction or Hypersensitivity? Erythema Multiforme Minor Reaction and Moderate Eosinophilia After the Pfizer-BioNTech BNT162b2 (mRNA-Based) SARS-CoV-2 Vaccine.

Journal of investigational allergology & clinical immunology·2021
Same author

Introduction of a standardised maternity early warning system: indicative data from a before-and-after study at a large pilot site before national rollout in Aotearoa New Zealand.

Anaesthesia·2021
Same author

Author Correction: Phenological shifts alter the seasonal structure of pollinator assemblages in Europe.

Nature ecology & evolution·2020
Same author

Phenological shifts alter the seasonal structure of pollinator assemblages in Europe.

Nature ecology & evolution·2020
Same journal

Reconstructing birth histories using linked household data and the 1911 Census fertility survey.

Population studies·2026
Same journal

Perceptions of infertility: The roles of age, knowledge, and motivated reasoning.

Population studies·2026
Same journal

The impact of education misreporting on education-specific mortality and educational inequalities in mortality: A scenario-based study.

Population studies·2026
Same journal

Social parenting and childlessness in Norway: Associations by sex and economic uncertainty.

Population studies·2026
Same journal

A review and evaluation of internal migration forecasting models.

Population studies·2026
Same journal

The generational health drift: A systematic review of evidence from the British birth cohort studies.

Population studies·2026
See all related articles

Related Experiment Video

Updated: May 27, 2026

Long-term Video Tracking of Cohoused Aquatic Animals: A Case Study of the Daily Locomotor Activity of the Norway Lobster (Nephrops norvegicus)
05:57

Long-term Video Tracking of Cohoused Aquatic Animals: A Case Study of the Daily Locomotor Activity of the Norway Lobster (Nephrops norvegicus)

Published on: April 8, 2019

Malthus on norway.

M Drake

    Population Studies
    |November 17, 2011
    PubMed
    Summary
    This summary is machine-generated.

    Thomas Malthus

    Area of Science:

    • Demography
    • Historical Sociology

    Background:

    • Thomas Malthus's 1799 visit to Norway influenced his seminal work, the Essay on the Principle of Population.
    • His analysis relied heavily on anecdotal evidence rather than statistical data.

    Purpose of the Study:

    • To re-evaluate Malthus's demographic observations of Norway using historical statistical data.
    • To identify inaccuracies and omissions in Malthus's assessment of Norwegian population dynamics.

    Main Methods:

    • Comparative analysis of Malthus's qualitative observations with available 18th and 19th-century Norwegian demographic statistics.
    • Examination of Malthus's itinerary and informant biases.

    Main Results:

    • Malthus overestimated household size and the prevalence of unmarried farm servants.

    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

    Visualization of Productivity Zones Based on Nitrogen Mass Balance Model in Narragansett Bay, Rhode Island
    05:04

    Visualization of Productivity Zones Based on Nitrogen Mass Balance Model in Narragansett Bay, Rhode Island

    Published on: July 14, 2023

    Related Experiment Videos

    Last Updated: May 27, 2026

    Long-term Video Tracking of Cohoused Aquatic Animals: A Case Study of the Daily Locomotor Activity of the Norway Lobster (Nephrops norvegicus)
    05:57

    Long-term Video Tracking of Cohoused Aquatic Animals: A Case Study of the Daily Locomotor Activity of the Norway Lobster (Nephrops norvegicus)

    Published on: April 8, 2019

    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

    Visualization of Productivity Zones Based on Nitrogen Mass Balance Model in Narragansett Bay, Rhode Island
    05:04

    Visualization of Productivity Zones Based on Nitrogen Mass Balance Model in Narragansett Bay, Rhode Island

    Published on: July 14, 2023

  • He overlooked significant regional variations in fertility and marriage patterns.
  • Statistical data reveal higher mortality rates than Malthus recognized, challenging his "positive check" theory.
  • Conclusions:

    • Malthus's reliance on non-statistical sources led to a biased and incomplete understanding of Norwegian population.
    • His underestimation of mortality rates significantly flawed his demographic model for Norway.