Results 71 to 80 of about 9,387,316 (229)

Is the allee effect relevant in cancer evolution and therapy? [PDF]

, 2020
Most models of cancer assume that tumor cells populations, at low densities, grow exponentially to be eventually limited by the available amount of resources such as space and nutrients.
Ferraro M., Delitala M.
core   +1 more source

Chaos and Bifurcations of a Leslie-Gower Food Chain with Strong Allee Effect

Discrete Dynamics in Nature and Society, 2015
Allee effect, as an important biological phenomenon, has been considered in many ecosystems, whereas, its influence on interactions of three or more species is little investigated.
Chunshan Xue, Xia Liu
doaj   +1 more source

Stable flies preferentially oviposit on sites offering conspecific eggs with egg‐derived bacterial semiochemicals

Insect Science, EarlyView.
Stable flies preferentially oviposit on sites offering conspecific eggs with egg‐derived airborne semiochemicals. Egg‐borne bacterial symbionts, and Serratia marcescens in particular, produce odorants which attract gravid female flies and elicit oviposition.
Emmanuel Hung, Anya Gould, Stephanie Zaborniak, Caelen Watson, Regine Gries, Sukhmani Kaur, Kyra Stephens, Augustus Negraeff, Ryan Lam, Alpha Hui, Pantea Zamani, Aryan Monfared, Gerhard Gries   +12 more
wiley   +1 more source

The Implications of Ungulate Population Dynamics for Conservation and Recovery Efforts in the Middle East. [PDF]

Ecol Evol
Using long‐term population data from Arabian oryx and sand gazelle populations across the Middle East, we found consistent evidence of negative density dependence, with annual growth rates declining as population size increased, alongside evidence of temporal lag effects in Arabian oryx.
Aljohani AS, Bonsall MB, Montgomery RA.
europepmc   +2 more sources

Beyond the Individual: Multisite Population‐Level Consequences of Road Mortality on a Declining Mammal

Animal Conservation, EarlyView.
We used a comparative study design to quantify population densities, structure, survival, cause‐specific mortality and female productivity in four West‐European hedgehog (Erinaceus europaeus) populations, and to forecast the impact of road mortality on population viability.
Lauren J. Moore, Silviu O. Petrovan, Adam J. Bates, Helen L. Hicks, Philip J. Baker, Sarah E. Perkins, David E. Wembridge, Richard W. Yarnell   +7 more
wiley   +1 more source

Multiple limit cycles in a Leslie–Gower-type predator–prey model considering weak Allee effect on prey

Nonlinear Analysis, 2017
In this work, a modified Leslie–Gower-type predator–prey model is analyzed, considering now that the prey population is affected by a weak Allee effect, complementing results obtained in previous papers in which the consequences of strong Allee effect ...
Eduardo González-Olivares, Alejandro Rojas-Palma, Betsabé González-Yañez   +2 more
doaj   +1 more source

On stochastic population model with the Allee effect

Mathematical and Computer Modelling, 2010
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Marija Krstic, Miljana Jovanovic
openaire   +3 more sources

Learning Across the Divide: Understanding Knowledge Sharing Through Petrographic Analysis on Ceramics From the Rhine‐Meuse Delta During the Middle to Late Neolithic Transition (3400–2200 bce)

Archaeometry, EarlyView.
ABSTRACT Vlaardingen (VL) communities on the Dutch West coast (3400–2200 bce) are part of a unique, long‐term continuity in the European Neolithic. Despite large‐scale changes in European populations during the Neolithic, the genomic diversity and cultural practices of VL communities can be retraced to the Mesolithic.
Jisca de Bruin, Erik Kroon, Lasse van den Dikkenberg, Dennis Braekmans   +3 more
wiley   +1 more source

Hierarchical competition models with Allee effects

Journal of Biological Dynamics, 2014
We consider a two-species hierarchical competition model with a strong Allee effect. The Allee effect is assumed to be caused by predator saturation. Moreover, we assume that there is a 'silverback' species x that gets first choice of the resources and where growth is limited by its own intraspecific competition, while the second 'inferior' species y ...
Laila, Assas, Saber, Elaydi, Eddy, Kwessi, George, Livadiotis, David, Ribble   +4 more
openaire   +2 more sources

When and why to give shorebirds a head start

Conservation Biology, EarlyView.
Abstract Headstarting is a translocation technique involving the hatching or rearing of wild eggs or young in captivity and the release of those individuals back to the wild at or before independence. It has been trialed as a conservation intervention for shorebirds over recent decades to improve the population trend of target populations by increasing
Lynda Donaldson, Alex Nicol‐Harper, Rebecca Lee, Nigel S. Jarrett, Geoff M. Hilton   +4 more
wiley   +1 more source