Chimpanzees of the Budongo Forest : Ecology, Behaviour, and Conservation
84 Diet and culture at Sonso series of manipulations of branches and leaves but is not known to vary systematically from site to ...
5. Social organization 7.30 Into forest with Zephyr. 7.45 KewayaKatia. Nick on trail ahead. Tinka. Mukwano in oestrus 4. Janie ...
Parties, food and social factors The pattern of fission and fusion of parties is central to chimpanzee social organization. Expl ...
sampling at a fixed interval, e.g. 2, 15, 30 or 60 min (i.e. counts of its members at regu- lar intervals). In continuous sampli ...
skewed to the left, i.e. smaller parties are more frequent than larger ones. Maximum party size in Taï was 41 (53.9% of the comm ...
Parties were analysed to see to what extent they consisted of one sex only or of both sexes. Only parties consisting of adults a ...
from the table and, more clearly, from the line graph, the proportion of all Sonso males represented in parties regardless of si ...
Within mixed parties, mothers with young infants do not show any fear of, or distance themselves from, adult males. Things are d ...
distribution of numbers of oestrous females in parties is shown in Table 5.2. One or more oestrous females was present in 244 of ...
Interestingly, it is not just the presence of more males that increases party size when oestrous females are present. There is a ...
a subset of the data to see if there was any difference between party size or composition according to season. The results are s ...
Taï (Boesch 1996). However, the importance of food as a determinant of party size has also been questioned. Isabirye-Basuta (198 ...
independent and interactive. A rich food supply (including the presence of nutritious leaves) increases party size; and it incre ...
Nesting and nesting parties 97 Table 5.6: Day and night nests compared (both sexes, N104 day nests, 601 night nests). Day nests ...
trees. Polystatic nests, made by both sexes, used two or more branches to provide support. They were of two subtypes, ‘tension’ ...
Consortships A relatively unusual kind of party consists of a male–female consortship. This was first described for the Gombe (K ...
The low frequency of observations of consort pairs may reflect a tendency on the part of such couples to keep quiet and thus avo ...
In chimpanzees matrilines are well known, as for example the matriline of Flo at Gombe (Goodall 1968), but because many if not a ...
(see Appendix C). However, they share in mating with oestrous females. And in their territorial behaviour they act together on b ...
Ranges and ranging behaviour The area over which the Sonso chimpanzees move has been studied by Newton-Fisher (1997, 2003) who f ...
«
1
2
3
4
5
6
7
8
9
10
»
Free download pdf