Sentence examples for tertiary ratios from inspiring English sources

Because of relative ease of assessment, the majority of sex-ratio observations in natural populations (including parasites) are made from tertiary ratios, which describe the population sex differential of reproductive adults.

Tertiary ratios are physical ratios, and since parasite reproduction is understood to be spatially tied to the host, they are often assumed to also reflect operational sex ratios (OSR).

Consequently, at similar tertiary sex ratios, the operational sex ratio (i.e. the number of receptive females per fertile male) should be higher in species where multiple mating leads to an increase in total egg production such as in N. californicus and A. andersoni.

Thus, at similar tertiary sex ratios (Sabelis & Janssen, 1994), the operational sex ratio is more strongly male-biased in P. persimilis than N. californicus and A. andersoni, allowing P. persimilis males fewer mating opportunities during life and consequently increasing the relative fitness value of single mating events.

In this study, we investigate the effect of inbreeding on tertiary sex ratio (the sex ratio of sexually mature adults) in Drosophila melanogaster using two separate pedigree crossing designs that differ in the level of inbreeding they generate on the X-chromosome.

To investigate the influence of the air distribution in the down-fired boiler which adopts the multi-injection and multi-stage combustion technology, a 1 20 small-scale model of a down-fired pulverized-coal 35 MWe supercritical utility boiler was set up to study the gas solid two-phase flow characteristics at different tertiary air ratios by using PDA (particle dynamics anemometer) measurement.

As a result, these polymers exhibited higher gene expression levels; however, polymers with the highest tertiary amine ratios resulted in very high toxicity.

A proposed consequence of inbreeding, which has received attention due to its implications for endangered populations, is that inbreeding may distort secondary and tertiary sex ratios by increasing the rate of sex specific mortality for the homogametic sex [ 2- 4].

Second, the propensity of females versus males to enter traps is unknown and so we do not know if the census sex ratio is an unbiased reflection of the tertiary sex ratio.

The sex ratio pattern indicates that domesticus localities with musculus Y introgression have an elevated proportion of males in the tertiary sex ratio.

If the trapping propensity of sexes is similar throughout the field area, it is clear that the tertiary sex ratio in introgressed localities has a higher proportion of males than other localities.