Summary of carnivore density and prey biomass. The number ofcarnivores per 10,000 kg of prey biomass was estimated from the ratio ofcarnivore population density (number per 100 km 2 ) to biomass density (in unitsof 10,000 kg per 100 km 2 ) of the main prey species averaged for each species. Thesevalues were used in Fig. 2A. Minimum and maximum estimates of the carnivoredensity and prey biomass density obtained for this study are provided ( 43 ).Carnivore speciesAveragemass (kg)Number ofpopulationsCarnivore densityNumber per 10,000kg of prey biomass(species average)Number per 100 km 2 Prey biomass(10,000 kg per100 km 2 )Least weasel* ( Mustela nivalis ) 0.14 6 1656.49 183.67 to 8000.00 0.24 to 8.33Ermine ( Mustela erminea ) 0.16 2 406.66 105.00 to 1333.33 0.38 to 2.47Small Indian mongoose ( Herpestes javanicus ) 0.55 3 514.84 1300.00 to 2850.00 3.00 to 5.00Pine marten ( Martes martes ) 1.3 1 31.84 56.80 1.78Kit fox ( Atelocynus microtis ) 2.02 2 15.96 16.00 to 24.00 0.66 to 3.05Channel Island fox (