South Asian river dolphin The sphincter-like structure is capable of sensing light, and may be able to sense the direction from where the light was emitted. However, the muddy waters, or low light conditions, that the "Platanista gangetica" inhabit negate the use of the little vision that remains. The Ganges subspecies shows object-avoidance behavior in both the consistently heavily murky waters of its habitat and in clear water in captivity, suggesting that it is capable of using echolocation effectively to navigate and forage for prey. However, there is limited information on how extensively vocalization is utilized between individuals. This subspecies of river dolphin is
Endangered Species Act of 1969 degrees of protection to more than 30,000 species of animals and plants, whether they are traded as live specimens, fur coats or dried herbs." Finally, the 1969 Act authorized up to $15 million to be appropriated to acquire land for the purpose of conserving, protecting, restoring, or propagating any endangered species. The Endangered Species Act of 1969 was only in effect for four years. It was soon replaced by the Endangered Species Act of 1973. The 1973 act was signed into law by President Richard Nixon, and expanded the protections afforded by the Endangered Species Act of 1969. The act