Question 17N.3.HL.TZ0.15
| Date | November 2017 | Marks available | [Maximum mark: 6] | Reference code | 17N.3.HL.TZ0.15 |
| Level | HL | Paper | 3 | Time zone | TZ0 |
| Command term | Predict, State, Suggest | Question number | 15 | Adapted from | N/A |
Wild turkeys (Meleagris gallopavo) once inhabited most forested areas of North America. As an important food source for early European settlers, the population of M. gallopavo seriously decreased. Due to recent conservation efforts, population numbers are increasing.
[Source: https://commons.wikimedia.org/wiki/File:A_wild_turkey_in_Middleboro,_Massachusetts.jpg]
![https://commons.wikimedia.org/wiki/File:A_wild_turkey_in_Middleboro,_Massachusetts.jpg]](https://commons.wikimedia.org/wiki/File:A_wild_turkey_in_Middleboro,_Massachusetts.jpg%5D){kind=link}
The curve shows a population of M. gallopavo from 2000 to 2015 in Ohio in the mid-western USA.
State the range of years when exponential growth of the M. gallopavo population occurred.
[1]
2000–2008
Suggest factors that could account for the growth curve of the M. gallopavo population.
[2]
a. natality AND mortality
b. immigration AND emigration
c. resources/abiotic conditions/carrying capacity
d. predation/hunting
[Max 2 Marks]
State how the population of M. gallopavo may have been determined.
[1]
capture–mark–release–recapture/Lincoln/Peterson method
Hunting of M. gallopavo is currently regulated. Predict what would happen if the hunting regulations were removed.
[2]
a. population would decrease/may become extinct
b. open realized niche for other organisms
OWTTE
c. food web may change
d. less intraspecific competition
[Max 2 Marks]