The density of wintering toads is high in some mounds and low in others. Toads using a particular mound appear to constitute a distinct population. The factors which make some mounds more attractive than others have not been determined. It is possible that the differences may be related to ...
Local density estimates a range of 13–31 owls/km2 in Canada (Manitoba, Alberta, Saskatchewan and British Columbia) and the USA (Arizona, California, Colorado, Idaho, Iowa, Kansas, Minnesota, Montana, Nebraska, New Mexico, North and South Dakota, Oklahoma, Oregon, Texas, Utah and ...
Aboriginal people are a sizable minority in some provinces – for example, in the western provinces of Manitoba and Saskatchewan, they constitute 15% of the population. It is in the North, however, that Aboriginal people are a significant segment of the population – 35% of the population of...
These include external factors such as host population density and geographical location, and intrinsic factors such as genetic constitution, life history, and other conditions which may vary between individuals and host populations. Most of these studies have been conducted on rodents7–9. Many have...
These include external factors such as host population density and geographical location, and intrinsic factors such as genetic constitution, life history, and other conditions which may vary between individuals and host populations. Most of these studies have been conducted on rodents7–9. Many have...
Thus, the likelihood of sustaining an injury from a pool drowning and/or recreational activity would increase with individuals of a higher SES [9]. Conversely, pedestrian and/or motor vehicle collisions tend to be higher among those residing in lower SES communities, where the population density ...
Department of Geography, University of Manitoba, Winnipeg, Canada Vaclav Smil Rights and permissions Reprints and permissions About this article Cite this article Smil, V. Detonator of the population explosion. Nature 400, 415 (1999). https://doi.org/10.1038/22672 Download citation Issue Date29 Ju...
Density-dependent Prenatal Androgen Exposure as an Endogenous Mechanism for the Generation of Cycles in Small Mammal Populations Small mammal populations exhibit cyclic fluctuations in their population densities. Several hypotheses regarding the mechanisms underlying these population... LG Cowell,LB Crowder,TB...
Each point represents a single cage experiment (i.e. 6 replicates for each treatment), with the average number of progeny indicated (horizontal lines). Progressive increases in sterile male seeding density produced significantly greater reductions in the number of progeny produced (ANOVA, P < ...
Thus, the likelihood of sustaining an injury from a pool drowning and/or recreational activity would increase with individuals of a higher SES [9]. Conversely, pedestrian and/or motor vehicle collisions tend to be higher among those residing in lower SES communities, where the population density ...