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Takifugu Obscurus
''Takifugu obscurus''Eschmeyer, W.N. (ed.) (1998) Catalog of fishes., Special Publication, California Academy of Sciences, San Francisco. 3 vols. 2905 p. or the obscure pufferfish is a species of euryhaline, Fish migration, anadromous Tetraodontidae, pufferfish first described by Tokiharu Abe, T. Abe in 1949. It has been categorized by the IUCN as a least-concern species globally since 2014; in South Korea, it is however classified as an endangered species due to overfishing of its endemic species, endemic populations.Doopedi/ref> The Catalogue of Life lists no subspecies of ''Takifugu obscurus''. The species prefers deeper, clearer areas of brackish water, brackish and freshwater, fresh water, and is found in Estuary, estuaries, as well as rivers and Tributary, tributaries thereof such as the South Korean rivers Geum River, Geum, Han River (Korea), Han, and Imjin river, Imjin, or the Tamsui River in mainland China. The species is endemic to North Korea, North and South Korea, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorsal Fin
A dorsal fin is a fin located on the back of most marine and freshwater vertebrates within various taxa of the animal kingdom. Many species of animals possessing dorsal fins are not particularly closely related to each other, though through convergent evolution they have independently evolved external superficial fish-like body plans adapted to their marine environments, including most numerously fish, but also mammals such as cetaceans (whales, dolphins, and porpoises), and even extinct ancient marine reptiles such as various known species of ichthyosaurs. Most species have only one dorsal fin, but some have two or three. Wildlife biologists often use the distinctive nicks and wear patterns which develop on the dorsal fins of large cetaceans to identify individuals in the field. The bony or cartilaginous bones that support the base of the dorsal fin in fish are called ''pterygiophores''. Functions The main purpose of the dorsal fin is to stabilize the animal against rollin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Han River (Korea)
The Han River or Hangang () is a major river in South Korea and the fourth longest river on the Korean peninsula after the Yalu River, Amnok (Yalu), Tumen River, Tuman (Tumen), and Nakdong rivers. The river begins as two smaller rivers in the eastern mountains of the Korean peninsula, which then converge near Seoul, the capital of the country. The Hangang River and its surrounding area have played an important role in Korean history. The Three Kingdoms of Korea strove to take control of this land, where the river was used as a trade route to China (via the Yellow Sea). The river is no longer actively used for navigation, because its estuary is located at the Korean Demilitarized Zone, borders of the two Koreas, barred for entrance by any civilian. The river serves as a water source for over 12 million South Koreans. In July 2000, the United States military admitted to having dumped formaldehyde in the sewer system connected to the river, causing protests. The lower stretches ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fugu
The fugu (; ; ) in Japanese, ''bogeo'' (; 鰒魚) or ''bok'' () in Korean, and ''hétún'' (河豚; 河魨) in Standard Modern Chinese is a pufferfish, normally of the genus ''Takifugu'', ''Lagocephalus'', or ''Sphoeroides'', or a porcupinefish of the genus ''Diodon'', or a dish prepared from these fish. Fugu can be lethally poisonous to humans due to its tetrodotoxin, meaning it must be carefully prepared to remove toxic parts and to avoid contaminating the meat. The restaurant preparation of fugu is strictly controlled by law in Japan and several other countries, and only chefs who have qualified after three or more years of rigorous training are allowed to prepare the fish. Domestic preparation occasionally leads to accidental death. Fugu is served as sashimi and nabemono. The liver was served as a traditional dish named ''fugu-kimo'', being widely thought to be a tasty part, but it is also the most poisonous, and serving this organ in restaurants was banned in Japan in 198 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poisonous Fish
Poisonous fish are fish that are poisonous to eat. They contain toxins which are not destroyed by the digestive systems of animals that eat the fish.Poisonous vs. Venomous fish: What’s the difference? Reef Biosearch. Retrieved 17 July 2009. also contain toxins, but do not necessarily cause poisoning if they are eaten, since the digestive system often destroys their venom. Examples *Species of (the family |
Tetrodotoxin
Tetrodotoxin (TTX) is a potent neurotoxin. Its name derives from Tetraodontiformes, an order that includes pufferfish, porcupinefish, ocean sunfish, and triggerfish; several of these species carry the toxin. Although tetrodotoxin was discovered in these fish and found in several other animals (e.g., in blue-ringed octopuses, rough-skinned newts, and moon snails), it is actually produced by certain infecting or symbiotic bacteria like ''Pseudoalteromonas'', ''Pseudomonas'', and ''Vibrio'' as well as other species found in animals. Tetrodotoxin is a sodium channel blocker. It inhibits the firing of action potentials in neurons by binding to the voltage-gated sodium channels in nerve cell membranes and blocking the passage of sodium ions (responsible for the rising phase of an action potential) into the neuron. This prevents the nervous system from carrying messages and thus muscles from contracting in response to nervous stimulation. Its mechanism of action, selective blocking o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fishkeeping
Fishkeeping is a popular hobby, practiced by aquarists, concerned with keeping fish in a home aquarium or garden pond. There is also a piscicultural fishkeeping industry, serving as a branch of agriculture. Origins of fishkeeping Fish have been raised as food in pools and ponds for thousands of years. Brightly colored or tame specimens of fish in these pools have sometimes been valued as pets rather than food. Many cultures, ancient and modern, have kept fish for both functional and decorative purposes. Ancient Sumerians kept wild-caught fish in ponds, before preparing them for meals. Depictions of the sacred fish of Oxyrhynchus kept in captivity in rectangular temple pools have been found in ancient Egyptian art. Similarly, Asia has experienced a long history of stocking rice paddies with freshwater fish suitable for eating, including various types of catfish and cyprinid. Selective breeding of carp into today's popular and completely domesticated koi and fancy goldfish b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal Testing
Animal testing, also known as animal experimentation, animal research, and ''in vivo'' testing, is the use of non-human animals in experiments that seek to control the variables that affect the behavior or biological system under study. This approach can be contrasted with field studies in which animals are observed in their natural environments or habitats. Experimental research with animals is usually conducted in universities, medical schools, pharmaceutical companies, defense establishments, and commercial facilities that provide animal-testing services to the industry. The focus of animal testing varies on a continuum from pure research, focusing on developing fundamental knowledge of an organism, to applied research, which may focus on answering some questions of great practical importance, such as finding a cure for a disease. Examples of applied research include testing disease treatments, breeding, defense research, and toxicology, including cosmetics testing. In edu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fugu
The fugu (; ; ) in Japanese, ''bogeo'' (; 鰒魚) or ''bok'' () in Korean, and ''hétún'' (河豚; 河魨) in Standard Modern Chinese is a pufferfish, normally of the genus ''Takifugu'', ''Lagocephalus'', or ''Sphoeroides'', or a porcupinefish of the genus ''Diodon'', or a dish prepared from these fish. Fugu can be lethally poisonous to humans due to its tetrodotoxin, meaning it must be carefully prepared to remove toxic parts and to avoid contaminating the meat. The restaurant preparation of fugu is strictly controlled by law in Japan and several other countries, and only chefs who have qualified after three or more years of rigorous training are allowed to prepare the fish. Domestic preparation occasionally leads to accidental death. Fugu is served as sashimi and nabemono. The liver was served as a traditional dish named ''fugu-kimo'', being widely thought to be a tasty part, but it is also the most poisonous, and serving this organ in restaurants was banned in Japan in 198 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South China Sea
The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by the shores of South China (hence the name), in the west by the Indochinese Peninsula, in the east by the islands of Taiwan and northwestern Philippines (mainly Luzon, Mindoro and Palawan), and in the south by Borneo, eastern Sumatra and the Bangka Belitung Islands, encompassing an area of around . It communicates with the East China Sea via the Taiwan Strait, the Philippine Sea via the Luzon Strait, the Sulu Sea via the straits around Palawan (e.g. the Mindoro and Balabac Straits), the Strait of Malacca via the Singapore Strait, and the Java Sea via the Karimata and Bangka Straits. The Gulf of Thailand and the Gulf of Tonkin are also part of the South China Sea. The shallow waters south of the Riau Islands are also known as the Natuna Sea. The South China Sea is a region of tremendous economic and geostrategic importance. One-third of the world's maritime shipping passe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East China Sea
The East China Sea is an arm of the Western Pacific Ocean, located directly offshore from East China. It covers an area of roughly . The sea’s northern extension between mainland China and the Korean Peninsula is the Yellow Sea, separated by an imaginary line between the eastern tip of Qidong at the Yangtze River estuary and the southwestern tip of South Korea's Jeju Island. The East China Sea is bounded in the east and southeast by the middle portion of the first island chain off the eastern Eurasian continental mainland, including the Japanese island of Kyushu and the Ryukyu Islands, and in the south by the island of Taiwan. It connects with the Sea of Japan in the northeast through the Korea Strait, the South China Sea in the southwest via the Taiwan Strait, and the Philippine Sea in the southeast via gaps between the various Ryukyu Islands (e.g. Tokara Strait and Miyako Strait). Most of the East China Sea is shallow, with almost three-fourths of it being less than ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Of Japan
The Sea of Japan is the marginal sea between the Japanese archipelago, Sakhalin, the Korean Peninsula, and the mainland of the Russian Far East. The Japanese archipelago separates the sea from the Pacific Ocean. Like the Mediterranean Sea, it has almost no tides due to its nearly complete enclosure from the Pacific Ocean. This isolation also affects faunal diversity and salinity, both of which are lower than in the open ocean. The sea has no large islands, bays or capes. Its water balance is mostly determined by the inflow and outflow through the straits connecting it to the neighboring seas and the Pacific Ocean. Few rivers discharge into the sea and their total contribution to the water exchange is within 1%. The seawater has an elevated concentration of dissolved oxygen that results in high biological productivity. Therefore, fishing is the dominant economic activity in the region. The intensity of shipments across the sea has been moderate owing to political issues, but it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Korea
North Korea, officially the Democratic People's Republic of Korea (DPRK), is a country in East Asia. It constitutes the northern half of the Korea, Korean Peninsula and shares borders with China and Russia to the north, at the Yalu River, Yalu (Amnok) and Tumen River, Tumen rivers, and South Korea to the south at the Korean Demilitarized Zone. North Korea's border with South Korea is a disputed border as both countries claim the entirety of the Korean Peninsula. The country's western border is formed by the Yellow Sea, while its eastern border is defined by the Sea of Japan. North Korea, like South Korea, its southern counterpart, claims to be the legitimate government of the entire peninsula and List of islands of North Korea, adjacent islands. Pyongyang is the capital and largest city. In 1910, Korean Empire, Korea was Korea under Japanese rule, annexed by the Empire of Japan. In 1945, after the Surrender of Japan, Japanese surrender at the End of World War II in Asia, end ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
