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Spear Squid
''Heterololigo'' is a monotypic genus of squids containing the single species ''Heterololigo bleekeri''. It was formerly classified in the genus ''Loligo''; some authors still include it there, but DNA evidence supports its separation into a genus of its own. This species is known by the common name spear squid, or ''yari-ika'' in Japanese. Lifespan It has a life span of about one year. Description It can be distinguished from other species in its family by its shorter tentacles. Habitat and distribution This squid is native to the western Pacific Ocean along the coast of Asia. It spawns in spring and summer in the northern part of its range, and in winter farther south. They are pelagic, found from around . Reproduction Like most Cephalopods, they are gonochoric. Male adults will usually die after spawning, and female adults after brooding. A unique aspect of the reproduction of this species has been well studied. The female has two sperm-storage sites in its body. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sendai Umino-Mori Aquarium
is a public aquarium located in Sendai, Miyagi Prefecture, Japan. It opened in 2015 as a successor to the Marinepia Matsushima Aquarium, which had been open for 88 years. History Marinepia Matsushima Aquarium was a public aquarium in Matsushima, Miyagi. It opened on April 1, 1927, and closed on May 10, 2015, making it the second longest-running aquarium in Japan, after Uozu Aquarium. Marinepia Matsushima Aquarium was operated by Sendai express which, in 2001, began to consider a renewal of the aquarium due to aging. Following the opening of Oga Aquarium Gao and Aquamarine Fukushima, the number of visitors to the aquarium began to decrease. In 2009, Sendai City announced plans to relocate the aquarium to Takasago Central Park in Sendai Port. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan
Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea in the south. The Japanese archipelago consists of four major islands—Hokkaido, Honshu, Shikoku, and Kyushu—and List of islands of Japan, thousands of smaller islands, covering . Japan has a population of over 123 million as of 2025, making it the List of countries and dependencies by population, eleventh-most populous country. The capital of Japan and List of cities in Japan, its largest city is Tokyo; the Greater Tokyo Area is the List of largest cities, largest metropolitan area in the world, with more than 37 million inhabitants as of 2024. Japan is divided into 47 Prefectures of Japan, administrative prefectures and List of regions of Japan, eight traditional regions. About three-quarters of Geography of Japan, the countr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monotypic Cephalopod Genera
In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the special case where a genus and a single species are simultaneously described. Theoretical implications Monotypic taxa present several important theoretical challenges in biological classification. One key issue is known as "Gregg's Paradox": if a single species is the only member of multiple hierarchical levels (for example, being the only species in its genus, which is the only genus in its family), then each level needs a distinct definition to maintain logical structure. Otherwise, the different taxonomic ranks become effectively identical, which creates problems for organizing biological diversity in a hierarchical system. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loliginidae
Loliginidae, commonly known as pencil squids, is an aquatic family of squid classified in the order Myopsida. Taxonomy The family Loliginidae was formerly classified in the order Teuthida. Taxonomic list The classification below (including 47 species) follows Vecchione ''et al.'' (2005) and the Tree of Life Web Project (2010).Vecchione, M. & R.E. Young. (2010)Loliginidae Lesueur, 1821 The Tree of Life Web Project. Several doubtfully distinct species have also been described; see the genus articles for these. *Genus '' Afrololigo'' **'' Afrololigo mercatoris'', Guinean thumbstall squid *Genus '' Alloteuthis'' **'' Alloteuthis africana'', African squid **''Alloteuthis media'', midsize squid **'' Alloteuthis subulata'', European common squid *Genus '' Doryteuthis'' **Subgenus ''Amerigo'' ***'' Doryteuthis gahi'', Patagonian squid ***'' Doryteuthis ocula'', bigeye inshore squid ***''Doryteuthis opalescens'', opalescent inshore squid ***''Doryteuthis pealeii'', longfin inshor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ika Sōmen
IKA may refer to * IATA code and common English abbreviation of Tehran Imam Khomeini International Airport * Industrias Kaiser Argentina, former Argentine motor company * Informativna katolička agencija, a Croatian Catholic news agency * ''Internationale Kochkunst Ausstellung'' (IKA), the International Exhibition of Culinary Art or Culinary Olympics * Imperial Klans of America, Knights of the Ku Klux Klan, a white supremacist organization * Social Insurance Institute (IKA), state-run social security organisation in Greece * Gosoku Ryu#Background, International Karate Association * International Kiteboarding Association See also *Ika (other) {{disambiguation eo:Internacio Katolika ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sushi
is a traditional Japanese dish made with , typically seasoned with sugar and salt, and combined with a variety of , such as seafood, vegetables, or meat: raw seafood is the most common, although some may be cooked. While sushi comes in numerous styles and presentation, the current defining component is the vinegared rice, also known as , or . The modern form of sushi is believed to have been created by Hanaya Yohei, who invented nigiri-zushi, the most commonly recognized type today, in which seafood is placed on hand-pressed vinegared rice. This innovation occurred around 1824 in the Edo period (1603–1867). It was the fast food of the ''chōnin'' class in the Edo period. Sushi is traditionally made with medium-grain white rice, although it can also be prepared with brown rice or short-grain rice. It is commonly prepared with seafood, such as Squid as food, squid, Eel as food, eel, Japanese amberjack, yellowtail, Salmon as food, salmon, Tuna as food, tuna or Crab stick, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neuron
A neuron (American English), neurone (British English), or nerve cell, is an membrane potential#Cell excitability, excitable cell (biology), cell that fires electric signals called action potentials across a neural network (biology), neural network in the nervous system. They are located in the nervous system and help to receive and conduct impulses. Neurons communicate with other cells via synapses, which are specialized connections that commonly use minute amounts of chemical neurotransmitters to pass the electric signal from the presynaptic neuron to the target cell through the synaptic gap. Neurons are the main components of nervous tissue in all Animalia, animals except sponges and placozoans. Plants and fungi do not have nerve cells. Molecular evidence suggests that the ability to generate electric signals first appeared in evolution some 700 to 800 million years ago, during the Tonian period. Predecessors of neurons were the peptidergic secretory cells. They eventually ga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mitochondrial DNA
Mitochondrial DNA (mtDNA and mDNA) is the DNA located in the mitochondrion, mitochondria organelles in a eukaryotic cell that converts chemical energy from food into adenosine triphosphate (ATP). Mitochondrial DNA is a small portion of the DNA contained in a eukaryotic cell; most of the DNA is in the cell nucleus, and, in plants and algae, the DNA also is found in plastids, such as chloroplasts. Mitochondrial DNA is responsible for coding of 13 essential subunits of the complex oxidative phosphorylation (OXPHOS) system which has a role in cellular energy conversion. Human mitochondrial DNA was the first significant part of the human genome to be sequenced. This sequencing revealed that human mtDNA has 16,569 base pairs and encodes 13 proteins. As in other vertebrates, the human mitochondrial genetic code differs slightly from nuclear DNA. Since animal mtDNA evolves faster than nuclear genetic markers, it represents a mainstay of phylogenetics and evolutionary biology. It als ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alternative Mating Strategy
An alternative mating strategy is a strategy used by male or female animals, often with distinct phenotypes, that differs from the prevailing mating strategy of their sex. Such strategies are diverse and variable both across and within species. Animal sexual behaviour and mate choice directly affect social structure and relationships in many different mating systems, whether Monogamy in animals, monogamous, Animal sexual behaviour#Polygamy, polygamous, Polyandry in animals, polyandrous, or Polygyny in animals, polygynous. Though males and females in a given population typically employ a predominant reproductive strategy based on the overarching mating system, individuals of the same sex often use different mating strategies. Among some reptiles, frogs and fish, large males defend females, while small males may use sneaking tactics to mate without being noticed. Strategies and selection Alternative mating strategies have been observed among both male and female animals. Most typica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilhelm Moritz Keferstein
Wilhelm Moritz Keferstein (7 June 1833, Winsen (Luhe) – 25 January 1870) was a German naturalist. He described a number of reptiles and amphibians for the first time. He originally studied hydraulic engineering in Hanover, later becoming a lecturer and professor of zoology at the University of Göttingen. With zoologist Ernst Ehlers (1835-1925), he wrote ''Zoologische Beiträge gesammelt im Winter 1859/60 in Neapel und Messina...'' in 1861. With Karl Wilhelm von Kupffer (1829-1902) he was co-author of a study on the electric organs of '' Gymnotus'' and ''Mormyrus'' that was published in Henle and Pfeufer's ''Zeitschrift für rationelle Medicin'' (Journal of rational medicine). He also made important contributions to Heinrich Georg Bronn's ''Die Klassen und Ordnungen des Thier-Reichs'' (Classes and Orders of the Animal Kingdom). Keferstein's tree frog is named after him (a species he described in 1868), as is a genus of polychaetes, ''Kefersteinia'' (family Hesionidae). ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gonochoric
In biology, gonochorism is a sexual system where there are two sexes and each individual organism is either male or female. The term gonochorism is usually applied in animal species, the vast majority of which are gonochoric. Gonochorism contrasts with simultaneous hermaphroditism but it may be hard to tell if a species is gonochoric or sequentially hermaphroditic e.g. parrotfish, '' Patella ferruginea''. However, in gonochoric species individuals remain either male or female throughout their lives. Species that reproduce by thelytokous parthenogenesis and do not have males can still be classified as gonochoric. Terminology The term is derived from Greek ''gone'' 'generation' + ''chorizein'' 'to separate'. The term gonochorism originally came from German ''Gonochorismus''. Gonochorism is also referred to as unisexualism or gonochory. Evolution Gonochorism has evolved independently multiple times. It is very evolutionarily stable in animals. Its stability and advantages h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pelagic
The pelagic zone consists of the water column of the open ocean and can be further divided into regions by depth. The word ''pelagic'' is derived . The pelagic zone can be thought of as an imaginary cylinder or water column between the surface of the sea and the bottom. Conditions in the water column change with depth: pressure increases; temperature and light decrease; salinity, oxygen, micronutrients (such as iron, magnesium and calcium) all change. In a manner analogous to stratification in the Earth's atmosphere, the water column can be divided vertically into up to five different layers (illustrated in the diagram), with the number of layers depending on the depth of the water. Marine life is affected by bathymetry (underwater topography) such as the seafloor, shoreline, or a submarine seamount, as well as by proximity to the boundary between the ocean and the atmosphere at the ocean surface, which brings light for photosynthesis, predation from above, and wind st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
