The Visayan warty pig, Sus cebifrons, is found on two islands in the Philippines. [Figure 1.1] shows a female Visayan warty pig with her young.
- (a)(i)The International Union for Conservation of Nature (IUCN) is the world's largest global environmental organisation. The IUCN Red List of Threatened Species™ evaluates the conservation status of plant and animal species. The Visayan warty pig is categorised as critically endangered on the IUCN Red List, which means that it is nearly extinct in the wild. There are now only approximately 200 Visayan warty pigs in the Philippines. Visayan warty pigs live in areas of dense forest that may be close to human habitation. Suggest two reasons why the Visayan warty pig is critically endangered.[2]
- (a)(ii)Describe the role of zoos in the protection of the Visayan warty pig.[3]
- (b)Sometimes the Visayan warty pigs will breed with domestic pigs, Sus domesticus. Suggest the consequences of this interspecific breeding.[3]
- (c)Table 1.1 shows part of the classification of the Visayan warty pig. Complete Table 1.1. Table 1.1 taxonomic group | name -----------------|-------- domain | kingdom | animalia phylum | chordata | mammalia order | artiodactyla family | suidae[2]
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Mark scheme
Marking points from the official mark scheme (Oct/Nov 2018). The mark or mark type is shown in brackets.
- [2] any two from 1 deforestation or habitat, destruction / fragmentation ; 2 killed; 3 disease; 4 reduction in food supply;
- [3] any three from 1 captive breeding / AI / IVF / surrogacy; 2 release into the wild / insurance populations; 3 education / awareness; 4 (work with Philippine government to) set up reserves ; 5 research, diet / habitat / breeding / behaviour / genetic diversity ; 6 veterinary care / monitor health ;
- [3] any three from 1 hybrids formed / fewer warty pigs produced ; 2 may be sterile ; 3 genetically different (from warty pigs) ; 4 (hybrid) less adapted for natural environment ; 5 (hybrid) ref. to susceptibility to, diseases / parasites ;
- [2] Eukarya; R eukaryote(s) / Eukaryota class;
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