Special Issue Survey of Cetaceans in Captive Care

3. Survey of International Cetacean Facilities 317Volume of Water per Animal—In sampled artificialfacilities (n = 29), the median volume/animalis 344 m 3 (minimum = 46 m 3 , maximum = 1,181m 3 ). Volume/animal ratio varies widely from onefacility to another. In sampled natural facilities(n = 6), the average volume/animal was 939.5m 3 (minimum = 306 m 3 , maximum = 11,333 m 3 ).Volume/animal ratio varied even more greatlyfrom one facility to another.The comparison (Figure 3.7) showed that, ingeneral, facilities keeping cetaceans in naturalenvironments offered a volume/animal ratio thatwas more than 2 1 ⁄2 times larger than artificialfacilities (Mann Whitney U test, Z = -2.67, p 0.05). The median valuewas almost twice as large in Europe than in Asia.Volume of Water per Animal—In sampledEuropean facilities (n = 15), the median volume/animal was 388 m 3 (minimum = 240 m 3 , maximum= 650 m 3 ). In sampled Asian facilities (n = 9), themedian volume/animal was 211 m 3 (minimum(700 m 2 )Surface area per animal in m 2European facilities IDAsian facilities IDFigure 3.8. Surface area per animal in Europe and Asian facilities