Q34 - Bonnet Macaque Population Demography
The age/sex composition of a population of bonnet macaques, a social primate that lives in groups with multiple females and males, over several years is given below.
| 2005 | 2009 | 2013 | |
|---|---|---|---|
| Estimated Population Size | 40 | 45 | 30 |
| Adult Male (%) | 6.67 | 13.11 | 20.00 |
| Adult Female (%) | 10.00 | 13.56 | 32.50 |
| Subadult Male (%) | 20.00 | 13.67 | 25.00 |
| Subadult Female (%) | 16.67 | 17.33 | 10.00 |
| Juvenile Male (%) | 22.33 | 19.67 | 5.00 |
| Juvenile Female (%) | 24.33 | 22.67 | 7.50 |
True or false?
Q34.1. The percentage annual population growth was relatively faster in 2013 than in other years.
Q34.2. The relatively more equal adult male-to-female ratio in 2009 may have been responsible for the overall smaller population size in 2013.
Q34.3. The age pyramid, shown by the population in 2005, as compared to that of 2009, is characterized by a higher birth rate and relatively lower life expectancy.
Q34.4. The male-to-female ratio of subadults reflects the male-to-female ratio of juveniles in this population in subsequent years.
Question reproduced from IBO 2023, Theoretical Paper 2, licensed under CC BY-NC-SA 4.0 - attributed to the International Biology Olympiad. Open the full exam PDF