Population dynamics in systems composed of cyclically competing species has been of increasing interest recently. Here we investigate a system with four or more species. Using mean field theory, we study in detail the trajectories in configuration space of the population fractions. We discover a variety of orbits, shaped like saddles, spirals, and straight lines. Many of their properties are fo...

Abstract Cyclic fluctuations of prey have profound effects on the functioning ecosystems, for example, by changing dynamics, behavior, and intraguild interactions predators. The aim this study was to assess effect rodent cyclic in interspecific a guild small- medium-sized predators: red fox ( Vulpes vulpes ), pine marten Martes martes weasels Mustela erminea nivalis ) boreal ecosystem. We analy...

Two S49 mouse lymphoma cell variants hemizygous for expression of mutant regulatory (R) subunits of type I cyclic AMP-dependent protein kinase were used to investigate functional consequences of lesions in the putative cAMP-binding sites of R subunit. Kinase activation properties of wild-type and mutant enzymes were compared using cAMP and six site-selective analogs of cAMP. Kinases from both m...

Males in many taxa are known to exhibit behavioural plasticity in response to the perceived intensity of sperm competition, reflected in Drosophila melanogaster by increased copulation duration following prior exposure to a rival. We tested the prediction that males do not adjust their copulation effort in response to the presence of a competitor in Drosophila species where there is little or n...

In many countries, particularly developing countries, economic reforms, especially privatization, are considered as a strategic approach. The growth of the government decreases the competition in the market, and so, some fields should be privatized in order to create the competition.  By moving towards privatization and the changes in competition methods and the presentation of the World Trade,...

the article introduces cyclic dilation groups and finite affine groups for prime integers, and  as an application of this theory it presents a unified group theoretical approach for the  cyclic wavelet transform (cwt) of prime dimensional periodic signals.