These 13 birds and an additional nine adult birds were also used for pharmacology experiments; pharmacology experiments were conducted several days after the behavior experiments.
At 56.7%, the average mortality rate was much higher in the F6 families than in the pure line chicks but close to the target mortality for the challenge test (50%). 1 The number of individuals in the susceptible pools was low (10 to 12 birds), hence an additional susceptible pool was created, which contained the next most susceptible 20% of birds.
In family × BT combinations with small numbers, the number of individuals in the susceptible pools was low (10 to 12 birds), hence an additional susceptible pool (Type II pool) was created, which contained the next most susceptible 20% of birds (cut off points demarcating the two pools can readily be inferred from the range column of Table 1).
They both use magnetometers to sense the earth's magnetic field, but the birds have an additional trick – polarised light.
The presence of marine birds represents an additional potential reservoir of infection, and in this regard the last tract of the Magra River, in Liguria, characterized by watersheds highly populated by water birds, should be also taken into account as a potential contamination source.
All females produced one or two mature follicles but only two out of the 56 experimental birds produced an additional third mature follicle.
In a real bird, that joint would really be the ankle and the bird would have an additional knee joint above it.
An official with New Zealand's Antarctic agency estimated that the birds had to walk an additional 30 miles each way.
If you decide to buy an additional bird, make sure that the cage is big enough for two parakeets.
Yesterday, the New York State Health Department reported an additional 12 birds infected with the disease, including two in Nassau, two in Westchester, and one each in Brooklyn, Manhattan and Rockland.
