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Question 17N.3.HL.TZ0.a.iii

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Date November 2017 Marks available [Maximum mark: 1] Reference code 17N.3.HL.TZ0.a.iii
Level HL Paper 3 Time zone TZ0
Command term Suggest Question number a.iii Adapted from N/A
a.iii.
[Maximum mark: 1]
17N.3.HL.TZ0.a.iii

To assess the impact of introduced cats (Felis silvestris) that prey on native species, a study was carried out on 120 islands around the world. The graph shows the impact of F. silvestris on reptiles, birds and mammals.

[Source: A global review of the impacts of invasive cats on island endangered vertebrates, F. M. Medina et al. (2011) Global Change Biology, 17, pp. 3503–3510. Reproduced with permission from John Wiley and Sons.]

Suggest a method to limit the impact of F. silvestris on native species.

[1]

Markscheme

a. control population/sterilization «of cats»/culling/hunting

b. keep household cats indoors

[Max 1 Mark]

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