Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Population regulation

Aleksiuk, M. (1968). Scent mound communication, territoriality, and population regulation in theheaver. Journal of Mammalogy 49,759-762. [Pg.429]

A recent attempt at a direct stochastic theory by Weinberger [94] using the deterministic flow term as an external (precomputed) constraint should be mentioned here. The intractability of a large coupled system of second-order partial differential equations for the generating function is then reduced to a (nonlinearly coupled) system of ordinary differential equations. The price is the loss of proper population regulation and possible extinction. [Pg.244]

In this chapter we present an individual-based population model (Metapopulation model for Assessing Spatial and Temporal Effects of Pesticides [MASTEP]). M ASTEP describes the effects on, and recovery of, populations of the water louse Asellus aqua-ticus following exposure to a fast-acting, nonpersistent insecticide caused by spray drift for pond, ditch, and stream scenarios. The model used the spatial and temporal distribution of the exposure in different treatment conditions as an input parameter. A dose-response relation derived from a hypothetical mesocosm study was used to link the exposure with the effects. The modeled landscape was represented as a lattice of 1 x 1 m cells. The model included processes of mortality of A. aquaticus, life history, random walk between cells, density-dependent population regulation, and in the case of the stream scenario, medium-distance drift of A. aquaticus due to flow. All parameter estimates were based on the results of a thorough review of published information on the ecology of A. aquaticus and expert judgment. [Pg.75]

Wang M, Grimm V. 2007. Home range dynamics and population regulation an individual-based model of the common shrew Sorex araneus. Ecol Model 205 397 -09. [Pg.145]

BERRYMAN, A.A., ARCE, M.L., HAWKINS, B.A., Population regulation, emergent properties, and a requiem for density dependence, Oikos, 2002, 99, 600-606. [Pg.113]

Further studies in the field of chemo-communication should focus more on the role of female-female interactions in the population regulation of microtine rodents. Female-female interactions have not gained yet the attention they deserve. [Pg.264]

Galindo, C. Krebs, C.J. 1987. Population regulation in deer mice the role of females. J. Anim. Ecol, 5(5, 11—23. [Pg.266]

Drickamer, L. C., 1981, Pheromones, social influences and population regulation in rodents, "Environmental Factors in Mammalian Reproduction,"... [Pg.430]

There are a number of important features of the relationship between the Railway Inspectorate and BR which help us to understand the Inspectorate s interpretative framework. The population regulated by the Inspectorate was very closely defined. At the time of this research it comprised BR as the company holding the monopoly of the overwhelming majority of the railway network in Britain. Apart from this, there were a number of locally based railway systems such as the London Underground and the minor railways, many of which were run by volunteer railway enthusiasts. A very large proportion of the Inspectorate s time was therefore spent with BR officials and this had a number of significant implications for the way in which the Inspectorate approached its work and interpreted the action (or lack of action) of the regulated population. The most obvious implication is that the Inspectorate knew some members of BR very well and that this was socially structured as they tended to have most contact with those in more senior positions (Hutter, 1993). [Pg.108]

The potential of the synthetic attractant for population regulation is therefore considerable. The major problems now are technological inexpensive attractant and effective formulation. So far, formulations have been derived from the spin-off from various industries. There is an urgent need for custom formulations designed specifically for the slow release of synthetic attractants. ... [Pg.138]


See other pages where Population regulation is mentioned: [Pg.44]    [Pg.58]    [Pg.165]    [Pg.63]    [Pg.94]    [Pg.432]    [Pg.38]    [Pg.3115]    [Pg.316]    [Pg.12]    [Pg.559]    [Pg.293]    [Pg.181]    [Pg.138]   
See also in sourсe #XX -- [ Pg.446 , Pg.447 ]




SEARCH



© 2024 chempedia.info