This was cited as another negative reason for their economic non-viability.

Even after local lemming peaks, the arctic fox population tends to collapse back to levels dangerously close to non-viability.

In short, only a few genes are needed for an effective post copulatory isolation barrier mediated through the non-viability of the hybrids.

The presence of these organisms in a species and their absence in another causes the non-viability of the corresponding hybrid.

Such an admission of the non-viability of a security policy concept of this kind must surely encourage us to seek alternative concepts.

This indicates differentiation of the embryo development genes (or gene complexes) in these species and these differences determine the non-viability of the hybrids.

The first was to run down both hospitals in parallel until a point of non-viability at either one of them was reached and a closure plan could be executed.

He said several monorail manufacturers had expressed the non-viability of building a 54-km monorail line (Vandalur to Puzhal) using existing technologies even during the previous tendering process.

While the employer may be fiscally able to pay the foreign worker, other circumstances, such as non-viability of the business itself, may preclude the employer from placing the foreign worker on the payroll.

The few last gold mines still present in the early twentieth century have been abandoned by lack of sustainability, and recent surveys by sampling (1980) have demonstrated the non-viability of this operation under current methods.

Libraries, whilst an important store of information, are vastly underused resources, with nine out of ten books not being accessed, and there are many thousands of books unavailable to consumers due to their being out of print or the non-viability of publication.

Interviews with prominent figures of the global philosophical and economic scene also point out to the non-viability of the euro and its contribution to the worsening of the finances of Greece due to a systematic loss of competitiveness in the markets by the PIGS.

An important unanswered question is whether the genes detected correspond to old genes that initiated the speciation favoring hybrid non-viability, or are modern genes that have appear post-speciation by mutation, that are not shared by the different populations and that suppress the effect of the primitive non-viability genes.