No abstract

Rostherne Mere, Cheshire, England, is a small lake with a maximum depth of about 30 m. It is a normal dimictic eutrophic lake with a diverse benthic fauna, but the sediments of the deepest part of the lake are permanently deoxygenated and are devoid of organisms other than copepods, probably in a dormant state. In the absence of any significant organic pollution from human sources, this condition is attributed to the deposition of faeces from the very large bird population on the lake, both resident and transitory.

Reproduction, population dynamics, movements, and habitat preferences of Melomys burtoni were studied through a capture-mark-release program on Cobourg Peninsula. In 8714 trap-nights; 143 individuals were captured over 116 weeks. Breeding occurred throughout the year, with an increased incidence during the wet season. Juveniles entered the populations over an extended period, and recruitment was low. Resident animals tended to utilize discrete 'core-areas', and showed a clear preference for Dense Forest dominated by Acacia aulacocarpa and a dense understorey of Pandanus spiralis.

No abstract

Three trials were conducted to compare the effectiveness of four 1080 dingo baits (two non-refined meat baits and two highly processed manufactured baits) in reducing dingo activity in the Northern Territory. Baits were laid at water points and dingo activity was estimated from track counts along a circular path cleared around each water point before baiting, immediately after and 10 months after baiting. Significant reductions in dingo activity were observed only at water points baited with non-refined meat baits. Highly processed manufactured baits did not significantly affect dingo activity. Data for non-target and dingo prey species were also recorded, but were generally insufficient to identify any effects of baiting on these species, or any relationships between the effectiveness of bait and the availability of prey. It is recommended that non-refined meat baits be used in preference to highly processed manufactured baits for the control of dingoes in the Northern Territory.