Fertility and immunity are concurrently upregulated in Drosophila melanogaster females after normal mating, potentially requiring physiological trade-offs. Using a novel bacterial introduction method, I observed female copulatory Serratia marcescens receipt and infection. Immuno-competent females surviving copulatory S. marcescens exposure had significantly reduced progeny production during the...

Formal definition of self-reproduction may have importance the Alife research program, especially for application of its achievements outside the discipline. The paper examines two formal definitions of self-reproduction, suggested by McMullin and Löfgren. It is pointed out that these definitions form two major branches of selfreproduction analysis, described by ancestor-progeny and system-envi...

The diurnal variation of the gross alpha (alpha) radioactivity in the air near the ground and the gamma (gamma) radioactivity emitted from the ground have been monitored in North-eastern Greece. Meteorological information comprising air temperature and humidity has been simultaneously recorded. Over a period of the 24h of a typical day, the variation of alpha-radioactivity reaches a peak in the...

Slavtchova-Bojkova, M., 1999. Computation of waiting time to successful experiment using age-dependent branching model. Ecol. Modelling, This paper considers the properties of the waiting time to survive forever of the supercritical age-dependent branching process modified with an immigration component. Conditioning on ultimate extinction of the process we analyze the conditional distribution o...

A reaction diffusion system with a distributed time delay is proposed for virus spread on bacteria immobilized on an agar-coated plate. A distributed delay explicitly accounts for a virus latent period of variable duration. The model allows the number of virus progeny released when an infected cell lyses to depend on the duration of the latent period. A unique spreading speed for virus infectio...

Parental deoxyribonucleic acid (DNA) molecules of bacteriophage T4 recombine with their progeny in a way which disperses pieces of the parental molecule over large numbers of the progeny DNA molecules. The parental contribution per progeny phage, or DNA molecule, which receives parental label, is about 5 to 7% of the phage DNA molecule (A. W. Kozinski, Virology 13:124, 1961). The fragment is in...

The Thoroughbred has been intensely selected for speed and performance since its development over 300 years ago. The concept of shuttle stallions was introduced in 1990 in order to introduce novel bloodlines in Australia and maintain genetic diversity in the Thoroughbred population. However Thoroughbred racing varies in different racing regions with Australia requiring faster and more precociou...

Estimation of indoor radon concentration and dose evaluation its progeny in selected dwellings Duhok city, Kurdistan Region, Iraq