You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Population Dynamics of Poikilotherm and Homeotherm Vertebrates: Effects of Food Shortage
Johan B. Steen, Harald Steen and Nils Chr. Stenseth
Vol. 60, No. 2 (Mar., 1991), pp. 269-272
Stable URL: http://www.jstor.org/stable/3544877
Page Count: 4
You can always find the topics here!Topics: Food availability, Biomass, Food supply, Animal feeding behavior, Population dynamics, Homeotherms, Simulations, Food shortages, Predation, Biomass production
Were these topics helpful?See something inaccurate? Let us know!
Select the topics that are inaccurate.
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
We have investigated how the population dynamics of two types of vertebrates is influenced by food shortage. One type consists of animals which show indeterminate growth rate (cut the coat to the cloth), e.g. fish. The other type includes animals which show a determinate type of growth rate (require a minimum daily food supply to survive), e.g. mammals and birds. To this end we have developed a model which assumes that animal biomass is regulated by food biomass alone (i.e. no predation), while food biomass follows self-regulating dynamics. The model predicts stable biomass for the first type of animals and unstable, cyclic biomass for the other. The results help to explain why fish in a pond often develop a stable population of numerous, small individuals, while e.g. hares or moose on an island, shielded from predation, develop a fluctuating population.
Oikos © 1991 Nordic Society Oikos