In 2016, a group of scientists analyzed several female Greenland sharks and estimated that they are more than 250 years old, and may potentially be over 500 years old. Spiny dogfish and whale sharks are estimated to have an amazing lifespan of up to 100 years while the oldest known shark in the world is the Greenland shark. Usually, sharks can live between 20 to 30 years when in the wild but there are some species that live longer (dusky shark can live 35 to 50 years, tiger shark 27 to 50 years, school shark more than 55 years, porbeagle between 30 and 65 years, and great white shark around 70 years). While sharks can be found in all oceans in the world, some of the species, such as bull sharks and river sharks, live in freshwater lakes and rivers. Sperm whales have been believed to attack sharks, as well. Sharks are known to be at the top of the food chain, however, orcas (killer whales) are known to kill great white sharks. The hammerhead sharks almost exclusively eat rays, which belong to the same family (Chondrichthyes or cartilaginous fish) as sharks. Some of the shark species listed as critically endangered include the large sawfish, the common sawfish, oceanic whitetip shark, daggernose shark, and New Guinea river shark.Įven though many shark species have specific diets, it is not uncommon for larger species, such as the great white sharks, tiger sharks, and mako sharks to eat smaller shark species in addition to fishes, seals, sea lions, and dolphins. More than 10% are listed as vulnerable, and over 14% as near threatened. What shark species are the most endangered ones according to the International Union for Conservation of Nature (IUCN)?Īccording to the International Union for Conservation of Nature (IUCN), more than 5% of shark species are endangered (2.4% of them being critically endangered). Shark meat is usually cut into steaks and fillets and prepared like meat from other large marine fish or is served fried with chips. Even though shark meat is legal for consumption in the USA, dried shark meat has become increasingly popular in many other countries (Australia, Sri Lanka, Japan, Korea, India, and others). Shark fins have high monetary and cultural value and are used in some dishes such as shark fin soup (primarily in China and Vietnam). Some sharks are killed in recreational fishing, but most of them are killed for their fins and meat. How many sharks are killed by people each year?Įvery year, people kill about 100 million sharks. In 2019, there have been noted only 64 unprovoked shark attacks around the world. The number of shark attacks is also decreasing. In the last ten years, the average number of people killed by sharks is less than five per year. How many people are killed in shark attacks per year? If you are amazed by sharks and would want to know more, keep reading! This article will answer some of the most common questions you might have about sharks and you will also read some interesting facts that may surprise you! Due to Illegal and irresponsible fishing, their population has been reduced by over 70% in the last 50 years and they are now functionally extinct in some of the reefs. In reality, sharks would much rather eat their natural prey than humans' flesh and they are the ones who are threatened by human activities. ![]() Media misrepresented them as rough sea creatures that could survive anything and it is often forgotten how vulnerable they are. Ever since they have diversified into more than 500 species. ![]() Sharks are fascinating creatures that have been around for the last 400 million years (yes, they have coexisted with the dinosaurs and outlived them). So, have you ever wondered how well we actually know sharks? There is so much more when it comes to sharks than their eating habits. But what we see in movies is not so close to the truth. We have all seen blockbuster movies with sharks portrayed as the greatest sea monsters, thirsty for human blood.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |