Question 17N.3.HL.TZ0.06
| Date | November 2017 | Marks available | [Maximum mark: 4] | Reference code | 17N.3.HL.TZ0.06 |
| Level | HL | Paper | 3 | Time zone | TZ0 |
| Command term | Predict, State | Question number | 06 | Adapted from | N/A |
Noise from ships has the capacity to disrupt the foraging behaviour of shore crabs (Carcinus maenas). In this study, C. maenas were collected from Newquay Harbour in the UK and held for a maximum of 48 hours in salt-water tanks located at a neighbouring aquarium. The graph shows the effect of simulated ship noise on the time spent foraging for food by C. maenas.
[Source: Republished with permission of Elsevier Science and Technology Journals, from ‘Noise negatively affects foraging and antipredator behaviour in shore crabs’, Matthew A. Wale, Stephen D. Simpson, Andrew N. Radford, Animal Behaviour 86, 2013; permission conveyed through Copyright Clearance Center, Inc]
State the effect of simulated ship noise on foraging behaviour.
[1]
foraging behaviour disrupted more «in the presence of simulated ship noise»
Predict the consequences on C. maenas of increasing noise related to human activity.
[3]
a. affects searching for food/foraging/selecting optimum prey
b. increased risk of starvation/less food «for survival»
c. cause migration/relocation/moving to other foraging area
d. individuals less distracted by noise will survive
OWTTE
OR
leads to natural selection
e. decline in population
[Max 3 Marks]
