Related Experiment Video
Updated: Mar 6, 2026

At-Risk Butterfly Captive Propagation Programs to Enhance Life History Knowledge and Effective Ex Situ Conservation Techniques
Published on: February 11, 2020
The decline of the Serengeti Thomson's gazelle population
M Borner1, C D FitzGibbon2,3, Mo Borner1
1Frankfurt Zoological Society, Serengeti National Park, c/o Tanzania National Parks, P.O. Box 3134, Arusha, Tanzania.
Abstract:
The population of Thomson's gazelles in the Serengeti National Park, Tanzania has declined by almost two thirds over a 13 year period. In the early 1970s, numbers stood at 0.66 million animals but had decreased to less than 0.25 million animals in 1985 as estimated by 5 different censuses using two different counting techniques. Predation, interspecific competition and disease are all factors that could have contributed to this decline, and at least one of these factors, predation, could now prevent the Thomson's gazelle population from increasing.
Related Concept Videos
Conservation of Declining Populations
Conservation of Small Populations
Threats to Biodiversity
Habitat Fragmentation
Population Growth
Thomson's e/m Experiment
A particle with charge q, speed v, and mass m enters an area from the top, where the magnetic and electric fields are perpendicular both to the particle's motion and to one another. The magnetic...

