Animals (Scientific Procedures) Act 1986 experiments licensed under the 1986 Act. The 1986 Act defined "regulated procedures" as animal experiments that could potentially cause "pain, suffering, distress or lasting harm", to "protected animals", which encompassed all living vertebrates other than humans, under the responsibility of humans. A 1993 amendment added a single invertebrate species, the common octopus ("Octopus vulgaris"), as a protected animal. The Act applied only to protected animals from halfway through their gestation or incubation periods (for mammals, birds and reptiles) or from when they became capable of independent feeding (for fish, amphibians and, the common octopuses). Primates, cats, dogs and horses had
Felidae Adult tigers actually display elongated rosettes that now appear as stripes. Adult lions seem to lack any distinctive markings altogether. Both juvenile tigers and lions, however, display partial rosettes. This ancestral character state appears only during these early stages, supporting the notion that ontogeny reflects phylogeny. The rosette patterns found on snow leopards, jaguars, and leopards all have a common origin. Fossil occurrences indicate that the Felidae arrived in North America about 10 million years later than the Canidae, and about 20 million years later than the Ursidae and the Nimravidae. Traditionally, five subfamilies have been distinguished within the Felidae