open population

Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.

open population

a population into which GENE FLOW is freely possible.


all of the animals in a specifically defined area considered as a whole. The population may also be defined in modes other than geography, e.g. the cow population, a species specification, the nocturnal bird population.

binomial population
see binomial population.
population cartogram
a map of populations.
case population
see case population.
closed population
e.g. closed herd or flock; a population into which no introductions are permitted, including artificial insemination or embryo transfer; the population is genetically and/or hygienically isolated.
comparison population
see comparison population.
contiguous p's
the populations are separated but have a common border. Some diseases are very difficult to restrain from spreading from one population to the next.
control population
see control population.
population density
see population density.
experimental population
the population in which the experiment, or trial, is being conducted.
finite population
one capable of total examination by census.
genetic population
see deme.
genetically defined population
one in which the ancestry of the animals in it is known.
population genetics
deals with the frequency of occurrence of inherited characteristics in a population.
infinite population
cannot be examined as a total population because they may never actually exist but are capable of statistical importance.
population limitation
restricting the growth of an animal population by desexing, by culling or by managemental means of interfering with reproduction.
population mean
the mean of the population.
population numbers
see population size (below).
open population
one in which immigration in and out is unrestrained.
parent population
the original population about which it is hoped to make some inferences by examination of a sample of its constituent members.
population proportion
the percentage of the population that has the subject characteristics.
population pyramid
a graphic presentation of the composition of a population with the largest group forming the baseline, the smallest at the apex.
population at risk
see risk population (below).
risk population
the population which is composed of animals that are exposed to the pathogenic agent under discussion and are inherently susceptible to it. Called also population at risk. High or special risk groups are those which have had more than average exposure to the pathogenic agent.
population size
actual counting of a total population, the census method, is not often possible in large animal populations. Alternatives are by various sampling techniques including area trapping, the trapping of all animals in an area, the capture-release-recapture method, the nearest neighbor and line transect methods,
The population size is expressed as the population present at a particular instant. Alternatively it can be expressed as an animal-duration expression when the population is a shifting one and it is desired to express the population size over a period (e.g. cow-day).
stable population
a population which has constant mortality and fertility rates, and no migration, therefore a fixed age distribution and constant growth rate.
target population
in epidemiological terms the population from which an experimenter wishes to draw an unbiased sample and make inferences about it.
References in periodicals archive ?
The basic assumptions of the classic CJS open population model to estimate survival probabilities are: (1) every individual in the data set has the same probability of survival between sampling occasions; (2) every individual has the same probability of being sighted at least once during the sampling interval; (3) the sighting of one individual is not dependent on the sighting of any other individual; (4) every individual is identified correctly; (5) sampling time is negligible.
Over the three years, however, I recorded no new pulse of previously unidentified individuals, suggesting that Galveston Ship Channel dolphins represent an open population with little net change in population size.
Closed and open population model estimates of abundance were used to estimate population density.
However, if a species does function almost entirely as an open population, it may not have the opportunity to adapt to local environments.
For this reason, it is possible that estimates of open population size for species that show substantial movements pertain to a larger area than estimates for comparatively sedentary species.
We conducted three experimental studies to test the hypothesis that each of the two species, through interspecific aggressive interactions, excludes the other from dense or sparse cover habitats: (1) a long-term, species-removal study using open populations along an interstate highway; (2) a short-term, species-addition study using enclosed populations in bluegrass (Poa pratensis); and (3) staged interspecific dyadic interactions.
gouldii were broadcast spawners with open populations, parasite loads must be analyzed by location in Southern California clams.
However, this is not so for spatially open populations, which are the rule rather than the exception in wildlife management.
Peterson estimates of size of population for open populations (populations of animals that could freely enter and leave the study area) tend to underestimate true size of population (King et al.