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Thursday, May 7, 2020 | History

4 edition of Spatial density dependence in a parasitoid - host system found in the catalog.

Spatial density dependence in a parasitoid - host system

Spatial density dependence in a parasitoid - host system

effects of scale, host spatial pattern and parasitoid reproductive strategy.

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  • 17 Currently reading

Published by National Library of Canada in Ottawa .
Written in English


Edition Notes

Thesis (M.Sc.)--University of Toronto, 1990.

SeriesCanadian theses = Thèses canadiennes
The Physical Object
FormatMicroform
Pagination1 microfiche.
ID Numbers
Open LibraryOL14891052M
ISBN 100315585161
OCLC/WorldCa31289990

General Overviews. Caswell is a general-interest book on matrix models, but in specific chapters it considers how to handle density-dependent transitions between different stages in structured population models. DeAngelis and Gross is a classic book focused on theory and modeling formulations for size-structured dynamics. Miller and Rudolf gives a broad overview of the effects › view › document ›. Schreiber, S.J. (), "Host-parasitoid dynamics of a generalized Thompson model", Journal of Mathematical Biology. Vol. 52, pp. Abstract: A discrete-time host-parasitoid model including host-density dependence and a generalized Thompson escape function is analyzed. This model assumes that parasitoids are egg-limited but not search › sschreiber ›

  SIAM Journal on Mathematical Analysis , Abstract | PDF ( KB) () Some remarks about the wave speed and travelling wave solutions of a nonlinear integral :// › doi › ›   density difference lies in the parameters that generate these cyclical dynamics in the CA model depend on both the strength of density dependence and the scale of dispersal relative to the scale of density dependence, whereas the dynamics in nonspatial models depend on the strength of the density dependence (May ) › ~beverlab › Publications › Molofsky and Bever pdf.

From an ecological point of view, the question of the way in which the functional response depends on the predator density is critical because this dependence plays a key role for population regulation, system stability, and community structuring (e.g., Arditi and Ginzburg , Akçakaya et › doi › full › › ES   Non-Linearity in population ecology by Carlos Martorell Departamento de Biolog´ıa, Facultad de Ciencias, UNAM, Mexico City This is a separate chapter from the open access book Frontiers in Ecology, Evolution and Complexity Mariana Ben´ıtez, Octavio Miramontes & Alfonso Valiente-Banuet (Editors) CopIt-arXives, Mexico City ISBN: › mir › copit › TSEN ›


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Spatial density dependence in a parasitoid - host system Download PDF EPUB FB2

Spatial Scale and Density Dependence in a Host Parasitoid System: An Arboreal Ant, Azteca instabilis, and Its Pseudacteon Phorid Parasitoid Much literature is dedicated to the study of › publication › A thorough review of models of host–parasitoid interactions is beyond the scope of this chapter (see instead Hassell,or Hassell and Waage, ).Here I consider only spatial heterogeneity in parasitoid attack rates relative to host densities, which is perhaps the most intensively studied mechanism that is capable of stabilizing host–parasitoid :// › › host-parasitoid-interaction.

At a small scale, since parasitism would match host density, direct spatial density dependence is predicted due to parasitoid aggregation, in accordance with the optimal foraging theory (Charnov › publication › This book examines our current understanding of the population dynamics of one kind of interaction--that between insect parasitoids and their hosts.

Parasitoids are amongst the most abundant of all animals, and make up about 10% or more of metazoan species. Almost no insect species escape their :// › academic › product › the-spatial-and-temporal-dynamics-of-host.

Buy The Spatial and Temporal Dynamics of Host-Parasitoid Interactions () (): NHBS - Michael P Hassell, Oxford University Press › the-spatial-and-temporal-dynamics-of-host-parasitoid-interactions. Spatial structure Host-parasitoid dynamics Demography Metapopulation Patch dynamics Biological control Foraging behaviour Landscape structure Sex ratio Density- dependence This is a preview of subscription content, log in to check :// › chapter › › _2.

Explaining the spatial patterns of natural populations with reference to density‐dependence acting at multiple scales is an alluring challenge, and continuing conceptual and methodological advances should allow us to do so with greater :// › doi › full › › jx.

To mimic density dependence, the transition rule stated that when the target cell and both its neighboring cells were occupied (i.e., at high density), the center cell in the following generation became empty (Molofsky ) › 百度文库 › 互联网.

The Allee effect strictly refers to inverse density dependence at low density. Factors involved in generating inverse density dependence are numerous and have been described for most major animal taxa factors can be classified into three main categories first is genetic inbreeding and loss of heterozygosity, leading to decreased fitness (such as demonstrated for plants5, 6).

› science › article › pii › S Four decades of parasitoid science. Charles J. Godfray They concluded that the most likely factor allowing the persistence of host–parasitoid interactions was spatial variation in the overlap of host and parasitoid populations so that Systems will vary in whether the density dependence in the system comes from bottom‐up › doi › › eea   What, then, can be said about the role of spatial variation in practice.

The stabilizing effects of heterogeneity were demonstrated famously, long ago, by Huffaker (; Huffaker et al., ), who studied a system in which a predatory mite fed on a herbivorous mite, which fed on oranges interspersed amongst rubber balls in a the absence of its predator, the prey maintained a › species-richness › aggregation-heterogeneity-and-spatial.

The rate of parasitism was related to host density in different ways at different spatial scales. Mesopolobus incultus exhibited inverse density dependence at the finest (seedhead) scale, direct density dependence at the intermediate (plant) scale, and density independence at › item › › the-effect-of-spatial-scale-on.

Read "Spatial ecology of host–parasitoid interactions: a threatened butterfly and its specialised parasitoid, Journal of Insect Conservation" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your :// › lp › springer-journals › spatial-ecology-of-host-parasitoid.

The SADIE system for spatial pattern analysis in ecology and biology. Abstracts 7th IMA Conference on Mathematics in Medicine and Biology, Oxford, July pp.

The impact of climate change on aphid population dynamics and phenology › item › 8v5q5 ›. General Overviews. The most basic model of density dependence in single-species population is the continuous logistic-growth equation.

One version of the model is first introduced in Verhulstalthough the model is often referred to as the Verhulst-Pearl model: Pearl and Reed is the first to make the model available to the broad scientific :// › view › document ›. Baronio, P.

and Sehnal, F. () Dependence of the parasitoid Gonia cinerascens on the P. () Behavior of the parasitoid Pleolophus basizonus in response to changes in host and parasitoid density.

Can. Ent D. () Effects of a virus associated with the reproductive system of the parasitoid wasp, Campoletis sonorensis › chapter › › _8. The Allee effect describes a scenario in which populations at low numbers are affected by a positive relationship between population growth rate and density, which increases their likelihood of extinction.

The importance of this dynamic process in ecology has been under-appreciated and recent evidence now suggests that it might have an impact on the population dynamics of many plant and animal › trends › ecology-evolution › fulltext › S(99) the spatial population structure of eight different hosts and their parasitoids have been characterized.

They demonstrated that (i) the population struc-tures of different host–parasitoid systems are highly variable, (ii) the parasit-oid and its host generally respond to spatial subdivision at different › viewdoc › download?doi=&rep=rep1&type=pdf. Therefore, we examined whether the fraction of individuals alive in a given year () was detectably influenced by the log (density + 1) of conspecific and heterospecific individuals in the current year (, reflecting contemporary density dependence) and/or in the previous year (, reflecting parasitoid build‐up from the previous year).

› doi › › jx. Matsumoto, T., Itioka, T., Nishida, T. & Inoue, T. () A test of temporal and spatial density dependence in the parasitism rates of introduced parasitoids on host, the arrowhead scale (Unaspis yanonensis) in stable host-parasitoids system.

Journal of › wp-content › uploads › › 02 ›. Importation biological control represents the planned introduction of a specialist natural enemy from the region of origin of an invasive pest or weed. For this study, the author considered why attempts to develop a predictive theory for biological control have been misguided and what future directions might be more promising and effective.

Despite considerable interest in the theory of › › 9 › 4 › › htm.Oobius agrili response to climate and host density variations. All F 0 O. agrili used in this experiment (n = ) were taken out of chill (°C) and placed in 25°C to emerge from procedure mimics the transition from winter to spring and cues the parasitoid to emerge (Larson & Duan, ).Once emerged, O.

agrili adults were placed in snap‐cap vials with adequate › pmc › articles › PMCThe Allee effect describes a scenario in which populations at low numbers are affected by a positive relationship between population growth rate and density, which increases their likelihood of extinction.

The importance of this dynamic process in ecology has been under-appreciated and recent evidence now suggests that it might have an impact on the population dynamics of many plant and animal › trends › ecology-evolution ›.