Animals should not be held in captivity; it does not save them from going extinct, but helps kill them off.
The first zoo in the United States was established in 1874 in Philadelphia, Pennsylvania.
Over people visit zoos and aquariums every year in the United States, and 25 million in the United Kingdom. Zoos have more visitors than the combined attendance of the four major sports leagues (, , and ). Despite their immense popularity, zoos have become increasingly controversial institutions. An increasing number of animal rights advocates and animal protection organizations are questioning the role of zoos in modern societies. The shocking evidence of animal abuse in some , and zoos have pushed many environmental and wildlife activist groups to campaign for the closure of many of the institutions that keep wild animals in captivity.
Should Animals Be Kept in Captivity
Animal cruelty or protection? Learn about the pros and cons of zoos and join our debate and poll: Should there be zoos? Should animals be kept in captivity? Vote and explain your view on whether zoos are necessary or should be banned.
Should animals be kept in captivity
As with the , the molecular evidence shows that virtually all major orders of mammals existed before the end-Cretaceous extinction. The Paleocene‘s Mammalian Explosion appears to have not been a genetic event, but an ecological one; mammals quickly adapted to empty niches that non-avian dinosaurs left behind. The kinds of mammals that appeared in the Paleocene and afterward illustrate the idea that body features and size are conditioned by their environment, which includes other organisms. With the sauropods' demise, high grazers of conifers never reappeared, but many mammals developed ornithischian eating habits and many attained similar size. That phenomenon illustrates the , in which assemblages of vastly different animals can inhabit similar ecological niches. The guild concept is obvious with the many kinds of animals that formed reefs in the past; the , , , , , , , and reefs all had similarities, particularly in their shape and location, but the organisms comprising them, from reef-forming organisms to reef denizens and the apex predators patrolling them, had radical changes during the . If you squinted and blurred your vision, most of those reefs from different periods would appear strikingly similar, but when you focused, the variation in organisms could be astounding. The woodpecker guild is comprised of animals that eat insects living under tree bark. But in Madagascar, where no woodpeckers live, a , with a middle finger that acts as the woodpecker’s bill. In New Guinea, . In the Galapagos Islands, a to acquire those insects. In Australia, , but unlike the others, they have not developed a probing body part, nor do they use tools, but just rip off the bark with the brute force of their beaks.
Killer Whales Should Not Be Kept in Captivity Essay | …
The Cenozoic equivalent of a bolide impact was the arrival of humans, as glyptodonts shortly after human arrival. The largest endemic South American animals to survive the of three mya, when North American placentals prevailed over South American marsupials, and the arrival of humans to the Western Hemisphere beginning less than 15 kya, are the and , which are tiny compared to their ancient South American brethren. The giant anteater is classified as a sloth, and sloths were a particularly South American animal. The were bigger than , which are Earth’s largest land animals today. After car-sized glyptodonts went extinct, dog-sized became the line’s largest remaining representative.