Suchergebnisse

Nine wild dogs, Canis f. familiaris, radio-tracked over periods of 28-61 days in Kosciusko National Park,
N.S.W., occupied home ranges of 220-5420 ha (mean 2193 ha). These home ranges were similar in size
to those observed for dingoes, C. f. dingo, in other areas of south-eastern Australia. The maximum
distance that any of the nine dogs moved between successive daily locations was 11.2 km. On the basis
of this information and that obtained by others, we suggest that the control of wild dogs on Crown
Land in south-eastern Australia should be confined to those areas adjacent to private grazing land.
Furthermore, a control zone 12-20 km wide should be adequate.
Two successive trail-baiting campaigns with 1080 poison in March and April 1982 killed only two
(22%) of the nine wild dogs carrying radio transmitters. Traps, in comparison, caught 15 out of 27 (56%)
of the dogs known to be in the area. The main factors which reduced the success of the poisoning
campaign were the rapid loss of toxicity of the baits after their distribution, the rapid rate at which
they were removed by other animals, particularly foxes Vulpes vulpes and birds, and the dogs' apparent
preference for natural prey.

Sample groups of children (n = 50) and adults (n = 38) were selected from pools of 207 children, (11-13-year olds from two primary schools) and 94 adults (25-44-year olds from four governmental agencies) who were the subjects of an oral health survey among Tibetans living in Lhasa, Tibet Autonomous Region. Mean ages of the study groups of children (38% females) and adults (61% females) were 11.6 ± 0.9 and 37.1 ± 6.1 years, respectively. All had lived in Tibet since birth. Oral rinse samples were selective cultured to isolate, quantify and speciate aerobic and facultatively anaerobic Gram-negative rods (using the API 20E kit) and yeasts (using API 20C AUX and API ZYM kits). For children, the isolation rates for oral coliform bacteria and yeasts were 84 and 14%, respectively, for adults, the respective rates were 26 and 40%. The corresponding quantities of coliforms/yeasts for children and adults were 0.4 ± 1.6 × 103 c.f.u./15.8 ± 72.3 and 0.2 ± 0.6 × 103 c.f.u./57.2 ± 137.5 c.f.u. per millilitre oral rinse, respectively. Aerobic and facultatively anaerobic Gram-negative rods and Stenotrophomonas maltophilia, a free-Living saprophytic and ubiquitous bacterial species of wide geographic distribution, were significantly more frequently recovered from the children's oral rinses. The isolation rates of facultatively anaerobic Gram-negative rods in adults and yeasts in both groups were similar to those found in similar cohorts from southern China in earlier studies. Randomly amplified polymeric DNA analysis showed that the S. maltophilia spp. isolated from children were of several different clonal types and were school specific. This study shows that the colonisation rate of facultatively anaerobic Gram-negative rods in adults and yeasts in both groups are similar to those in populations living at lower altitudes, the native young, urban Tibetans appear to exhibit a high oral carriage rate of S. maltophilia spp. © 2003 Elsevier Science Ltd. All rights reserved. ; postprint