The modern breed is descended from a number of breeding programs of white terriers in Scotland prior to the 20th century.
The original version said the number of breeding pairs was estimated at 1,500.
The researchers, from the Scripps Institution of Oceanography, say the number of breeding pairs has sharply declined.
The report notes that the number of breeding pairs of bald eagles jumped by 50percentt in the past year.
There are a number of breeding materials with useful levels of resistance to PLRV.
Now, the number of breeding sites are increasing at such a rate that Cygnus atratus may be on the brink of establishing a self-sustaining population.
In Britain, researchers must record the number of animals they use, the number of procedures they carry out and the number of breeding animals used in GM breeding.
On the Bounty Islands the number of breeding pairs fell from 115,000 in 1978 to 28,000 by 1998.
The bill would allow for the sale of calves and heifers if the number of breeding stock were not reduced.
A pride consists of several generations of lionesses, some of which are related, a smaller number of breeding males, and their cubs.
It presents data on the year's lamb crop and wool production, including the number of breeding ewes per 1,000 head by state.
