Results 261 to 270 of about 1,450,630 (312)

Growth kinetics and population density of a laboratory colony of the poultry red mite (Dermanyssus gallinae) established in Japan.

J Vet Med Sci
Inoue T, Mizutani K, Kunisada H, Ladzekpo D, Kwofie KD, Koike Y, Sasaki S, Jimbo K, Kawada H, Mikami F, Anisuzzaman, Alim MA, Matsubayashi M, Yoshida T, Furukawa T, Ueno T, Oda K, Tsuji N, Hatta T.   +18 more
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Population density drives increased parasitism via greater exposure and reduced resource availability in wild hosts

Hasik AZ, Butt S, Maris K, Morris S, Morris A, Turner RS, Pemberton JM, Albery GF.   +7 more
europepmc   +1 more source

Urban Population Density: A Comment [PDF]

Environment and Planning A: Economy and Space, 1981
The poor results obtained with certain members of the quadratic gamma family is shown to be due to a specification error in most of the members of that family. By choosing a more admissible travel-cost function, the displaced quadratic gamma function is derived, which does not contain this specification error.
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Survival variability and population density in fish populations

Nature, 2008
To understand the processes that regulate the abundance and persistence of wild populations is a fundamental goal of ecology and a prerequisite for the management of living resources. Variable abundance data, however, make the demonstration of regulation processes challenging.
Coilín, Minto, Ransom A, Myers, Wade, Blanchard   +2 more
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The many faces of population density

Oecologia, 2005
Population density, one of the most fundamental demographic attributes, may vary systematically with spatial scale, but this scale-sensitivity is incompletely understood. We used a novel approach-based on fully censused and mapped distributions of eastern grey squirrel (Sciurus carolinensis) dreys, beaver (Castor canadensis) lodges, and moose (Alces ...
Stephen J, Mayor, James A, Schaefer
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Population Density and Mental Illness

The Journal of Social Psychology, 1994
(1994). Population Density and Mental Illness. The Journal of Social Psychology: Vol. 134, No. 4, pp. 545-546.
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Population Density and Group Size

American Journal of Sociology, 1972
This study looks at the relationship between the size of the small interacting group (in numbers of persons) and its environment in this case, the density of its immediate population. We hypothesized that persons in more densely populated areas will gather for social interaction in smaller groups, in fewer bisexual groups.
J, Tucker, S T, Friedman
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Density-vague population change

Trends in Ecology & Evolution, 1986
Explicit density-dependence differs from density-vagueness in the sort of regulation imposed on populations. Explicit density-dependence implies regulation toward a central equilibrium point, whereas density-vagueness implies population change away from the two extremes of extinction and immense densities.
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Population density effects on longevity

Genetica, 1993
Population density, or the number of adults in an environment relative to the limiting resources, may have important long and short term consequences for the longevity of organisms. In this paper we summarize the way in which crowding may have an immediate impact on longevity, either through the phenomenon known as dietary restriction or through ...
J L, Graves, L D, Mueller
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Population Density and Infrastructure Development

Review of Development Economics, 1997
A model is proposed with the following features: (1) there is a publicly accessible transport technology, which is more advanced when there is more specialized labor in it; (2) a high population density facilitates the development of the transport technology; (3) an improved transport technology facilitates a finer division of labor, which in turn ...
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