A quasi-cyclicity associated with variability of environmental conditions is detected for the regression residuals stock-recruitment model chum salmon Oncorhynchus keta in Okhotsk district, described by Ricker’s equation. The main factors influenced on progeny abundance were number spawners and amount precipitation spawning grounds area certain months. mathematical has been developed that simul...

Gilt progeny have lighter weaning weights and greater postweaning medication and mortality rates compared with the progeny of older parity sows. Because weaning weight has been positively correlated with postweaning survival, this study aimed to determine whether the provision of supplemental milk preweaning could improve weaning weight and subsequent weights as well as postweaning survival of ...

Radon progeny concentration is measured with a total alpha counting system in 185 dwellings in the town of Thessaloniki. The Equilibrium Equivalent radon Concentration (EEC Rn) follows a lognormal distribution with an arithmetic and geometric mean value of 28 Bq/m and 16 Bq/m respectively. Simultaneous in situ alpha and gamma spectroscopy measurements were performed in 60 schools of Thessalonik...

Radon is the most important source of natural radiation to human beings and second major causative agent lung cancer other than smoking. In recent years, hazards exposure thoron (Rn-220), another isotope radon, its progeny have gained consensus. To accurately evaluate dose level Rn-220 progeny, a standard chamber with strong regulation ability for needs be established scale or calibration measu...

Facial eczema (FE) is a disease of grazing ruminants causedbyingestingsporesofthefungusPithomyces chartarum. The spores contain a toxic compound, sporidesmin, which causes liver injury, sensitivity to sunlight andreduced performance in susceptible dairy cattle. The extent of production losses is summarised. Research at Ruakura has demonstrated that the resistance of animals to FE is inherited, ...

Levels of three adrenal catecholamine synthesizing enzymes and isolation-induced fighting behavior were studied in two related sublines of the Balb/c inbred mouse strain. Enzyme levels were twice as high in the adrenals of Balb/cJ mice as in those of the Balb/cN mice; heterozygous progeny were intermediate between their parents in the levels of the three enzymes. These sublines also showed mark...

The objective of the current study was to determine whether prenatal iron deficiency induced during gestation in guinea pigs affected locomotor activity and learning and memory processes in the progeny. Dams were fed either iron-deficient anemic or iron-sufficient diets throughout gestation and lactation. After weaning, all pups were fed an iron-sufficient diet. On postnatal day 24 and 40, the ...

Cancer cells have acquired mutations that alter their growth. Aneuploidy that typify cancer cells are often assumed to contribute to the abnormal growth characteristics. Here we test the idea of a link between aneuploidy and mutations allowing improved growth, using Saccharomyces cerevisiae containing a mcm4 helicase allele that was shown to cause cancer in mice. Yeast bearing this mcm4 allele ...

Previous experiments discovered high rates of chromosomal rearrangements in the progeny of males containing a telomeric segment of Drosophila koepferae in a D. buzzatii genetic background (segmental males). We have performed similar experiments, designed to test whether this chromosomal instability could be explained by a phenomenon similar to P-M hybrid dysgenesis or, alternatively, by a gener...