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Anthony D. Barnosky, ‘Megafauna Biomass Tradeof as a Driver of Quaternary and Future Extinctions’, PNAS 105:1 (2008), 11543–11548; for wolves and lions: William J. Ripple et al., ‘Status and Ecological Efects of the World’s Largest Carnivores’, Science 343:6167 (2014), 151; если верить доктору Стэнли Корену, сегодня на планете живет около 500 млн собак. См.: Stanley Coren, ‘How Many Dogs Are There in the World’, Psychology Today, 19 September 2012, accessed 20 December 2014, http://www.psychologytoday.com/blog/canine-corner/201209/how-many-dogs-are-there-in-the-world; о мировой популяции кошек см.: Nicholas Wade, ‘DNA Traces 5 Matriarchs of 600 Million Domestic Cats’, New York Times, 29 June 2007, accessed 20 December 2014, http://www.nytimes.com/2007/06/29/health/29iht-cats.1.6406020.html; подробнее об африканских буйволах см.: ‘Syncerus cafer’, IUCN Red List of Treatened Species, accessed 20 December 2014, http://www.iucnredlist.org/details/21251/0; подробнее о популяции крупного рогатого скота см.: David Cottle and Lewis Kahn, ed., Beef Cattle Production and Trade (Collingwood: Csiro, 2014), 66; подробнее о домашних курах см.: ‘Live Animals’, Food and Agriculture Organization of the United Nations: Statistical Division, accessed December 20, 2014, http://faostat3.fao.org/browse/Q/QA/E; подробнее о популяции шимпанзе см.: ‘Pan troglodytes’, IUCN Red List of Treatened Species, accessed 20 December 2014, http://www.iucnredlist.org/details/15933/0.