Relationship between linear habitat area (km) and giant otter population
size estimates (number of individuals) during the post-filling scenario, estimated
using the mean den density documented in this study (dashed line) and a
hypothetical scenario in which the total population size had scaled to the overall
habitat expansion induced by the Balbina dam, estimated using the mean den
density reflecting pre-filling habitat conditions (Rosas et al., 2006, solid line). The
shaded area represents the shortfall between the expected and the observed giant
otter population sizes estimated for the newly available habitat area. Vertical
dashed line indicates the total perimeter of the Balbina reservoir.