Each year, the discovery of new shark species underlines how little we know about ocean biodiversity. In a recent report conducted by Sibert and Rubin, they reported unexpected findings: a large-scale extinction of sharks in the pelagic ocean, the largest ecosystem on Earth, about 19million year...
Animal migration is not simply traveling; it is a repeating, usually annual or seasonal, pattern of long-distance travel. Animals typically migrate to avoid extreme heat or cold, for reproduction purposes, or for accessibility to food. Many species of shark migrate, including the whale shark. ...
CITES Aims to Protect Ocean Species C A new rule has been passed that will protect more than 50 of the world's shark species,many of which are endangered. The deal was signed by the Convention on International Trade ir 相关知识点: 试题来源: 解析 【解题导语】本文是说明文,主题语境是"...
What eats a sand tiger shark? What is the average size of a great white shark? What is the most endangered species of shark? What eats tiger sharks? How many species of leopards are there? How many eggs can a Burmese python lay?
Very little is known about shark behavior, but it is believed that some species, including great whites, display dominance behavior over other sharks. This behavior can take the form of "punching" with the snout, or bites that don't do much damage to the tough skin of a shark. ...
根据本段内容"A team at the University of Western Australia studied the visual systems of many different species of sharks and what they have found is diversity in eye design that mirrors the ecological and behavioral diversity of the shark species. The team looked at the retinal cells of 17 ...
Different shark species have evolved a variety of systems to ensure they receive adequate oxygen. For instance, Great White Sharks are ram ventilators, meaning they must keep swimming to push water over their gills. In contrast, other species, like nurse sharks, use buccal pumping—drawing water...
Dino, who manages the Thresher Shark Divers (TSD) centre, turned his home into an evacuation shelter, supplying rice and water stockpiled from Cebu City to his staff. Malapascua was flattened, but no lives were lost on the island. Tourists had been evacuated w...
Large extant marine vertebrates continue to be discovered and described: during the late twentieth and early twenty-first century, several cetaceans and chondrichthyans exceeding three metres in total length have been described, including the megamouth shark, Omura's whale, Bandolero (or Peruvian or...
Often conducted in remote and dangerous environments, shark research requires time and money. But that work is paying off as researchers continually identify new species of sharks, such as those that canwalk on the ocean floorandglow in the dark. ...