Abstract
Mice were introduced to an island before and after food was supplied in excess of food consumed. The population of mice on the experimental island with food in excess is compared with populations of mice on the same island before the addition of food, on an adjacent island, and on the mainland. Before food was supplied in excess, death rate (death and dispersal) greatly exceeded birth rate and the population failed. After food was supplied in excess death rate of the second introduction decreased and population increased to greatly exceed the density of mice on the control island.The increased density of mice on the experimental island is the result of a decreased death rate, particularly in mice from birth to approximately 1 month of age. Increased birth rate may also be a factor. Food supply regulates the abundance of white-footed mice by affecting death rate and possibly birth rate. The most important effect of food supply is on the survival of young from birth to approximately 1 month of age.Evidence that intraspecific strife for space occurs in relatively dense population is presented. Intraspecific strife for space may regulate population of mice beyond the level of abundance determined by the supply of food.
Full Text
Topics from this Paper
Population Of Mice
Death Rate
Birth Rate
Increased Birth Rate
Addition Of Food
+ Show 5 more
Create a personalized feed of these topics
Get StartedSimilar Papers
Modern History of Russia
Jan 1, 2022
Bulletin of the Ecological Society of America
Apr 1, 2015
Social Aspects of Population Health
Jan 1, 2020
Journal of Human Ecology
Jan 1, 1996
Nature Genetics
Jan 1, 2010
Oecologia
Dec 1, 1977
American Journal of Sociology
Sep 1, 1949
Apr 1, 2021
The Annals of Mathematical Statistics
Mar 1, 1948
Limnology and Oceanography
Jan 1, 1992
The American Naturalist
Jan 1, 1972
Canadian Journal of Zoology
Canadian Journal of Zoology
Sep 28, 2023
Canadian Journal of Zoology
Sep 27, 2023
Canadian Journal of Zoology
Sep 27, 2023
Canadian Journal of Zoology
Sep 26, 2023
Canadian Journal of Zoology
Sep 1, 2023
Canadian Journal of Zoology
Aug 31, 2023
Canadian Journal of Zoology
Aug 30, 2023
Canadian Journal of Zoology
Aug 30, 2023
Canadian Journal of Zoology
Aug 28, 2023
Canadian Journal of Zoology
Aug 24, 2023