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Title: | A STUDY ON RATTUS ANNANDALEI | Authors: | CHELLIAH THILLAGAVATHY | Issue Date: | Jan-1968 | Citation: | CHELLIAH THILLAGAVATHY (1968-01). A STUDY ON RATTUS ANNANDALEI. ScholarBank@NUS Repository. | Abstract: | 1. Information on the home-range, movement and composition fluctuation of a Rattus annandalei population was obtained from a 17 month live trapping study in a 7 hectare plot of secondary forest in Singapore. 2. Grid line trapping did not appear to disturb either the movement patterns, the distribution or the abundance of animals. 3. The home range of only eleven resident rats were studies. All these home ranges were completely within the boundaries of the study area. 4. The mean home range size of 2.07 hectare for males is significantly different from the mean of 0.603 hectare for that of females. 5. The home ranges of adult R. annandalei of like sex showed a similar pattern. 6. Home ranges of males overlapped one another and covered that occupied by several females. Whereas females had smaller and separate home ranges. 7. The home range boundaries coincided with vegetative or topographic features. 8. Resident rats tended to remain on the same home range as throughout the study. 9. The composition of the population was continually undergoing change through gain and loss of rats. The two juveniles marked in the area must have dispersed from the population but the means whereby adults were lost from the area was not ascertained. 10. Sex-ration was prejudiced towards the males which tended to exhibit greater movement. 11. These animals could find their way back after being released in unfamiliar area. 12. There was a tendency for homing experiments to induce immigration of R. r. diardii into the depopulated area. These occupy only the ecotone region. | URI: | https://scholarbank.nus.edu.sg/handle/10635/166115 |
Appears in Collections: | Master's Theses (Restricted) |
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