Metasepia tullbergi je druh sépie z rodu Metasepia. Do stejného rodu ještě patří Metasepia pfefferi.
Typový exemplář popsal Appellöf v roce 1886,[2] pochází z Japonska a je uložen v Zoologickém muzeu v Uppsale ve Švédsku.[3]
Metasepia tullbergi se vyskytuje v Indo-Pacifiku od Japonska (jižního okraje ostrova Honšú), přes Japonské moře na východ k Číně. Dále se vyskytuje kolem Tchaj-wanu, Filipín a v Thajském zálivu.[4]
Metasepia tullbergi je nevelká sépie, její plášť je velký asi 70 mm, a váží 30-40 g. Žije v mělkém moři při dně na kontinentálním šelfu (v hloubkách od 20 do 100 m).[4] Od října do února byli nalézáni v hloubkách od 20 m do 80 m, ačkoliv od března do dubna nebyli nalezeni v hloubkách od 50 m do 80 m.[5] Vyhledává především písčitý nebo blátivý podklad. Vejce klade v hloubce asi 20 m na skalnaté podklady. Mladé sépie se líhnou v létě a v srpnu až září se stěhují do větších hloubek (až do 80 m) na písčité nebo bahnité dno.[4] [5] V březnu až květnu se dospělé sépie stěhují do mělčích skalnatých oblastí, kde se třou.[6] Protože v červnu a červenci nebyli nalezeni žádní jedinci a v srpnu byli nalezeni jen mladí jedinci, zdá se, že dospělci hynou po tření.[5]
Jak velká je její populace se neví.[6] Metasepia tullabergi se neloví, ale jelikož žije v oblasti kde se hojně rybaří, může být ohrožena rybolovem. Protože je atraktivní, také není vyloučena hrozba jejího lovu pro mořská akvária.[4] Neméně nebezpečné může být, jako pro všechny sépie, okyselování moří v důsledku zvýšené koncentrace CO2 v atmosféře (jelikož se tímto poruší acidobazická rovnováha, sépie více kalcifikuje sépiovou kost, čímž se stává hustější a mohla by mít nepříznivý vliv na řízení vztlaku živočicha).[7]
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Metasepia tullbergi je druh sépie z rodu Metasepia. Do stejného rodu ještě patří Metasepia pfefferi.
Typový exemplář popsal Appellöf v roce 1886, pochází z Japonska a je uložen v Zoologickém muzeu v Uppsale ve Švédsku.
The paintpot cuttlefish (Metasepia tullbergi) is a small, poorly researched species of cuttlefish found in the Indo-Pacific, between Japan and Hong Kong. It is one of the two species classified in the genus Metasepia. Metasepia cuttlefish are characterized by their small, thick, diamond-shaped cuttlebone, and distinctive body coloration.[3]
Paintpot cuttlefish are a slow-moving, bottom-dwelling species in the neritic zone and found at a depth of 20 to 100 meters in subtropical climates. Their mantle is about 70mm long and they can weigh from 30 to 40 grams. They have a broad, oval-shaped mantle with 10 to 13 pores on each side. Their fins are joined in the back of the animal with arms located on the opposite end of the fish. Their arms typically have 10 to 12 rows of shorter suckers followed by larger ones and then tapering in size through to the arm tip.[4] The hectocolytus (male sperm) is present in the left ventral arm. Unlike other species of cuttlefish, Metasepia have a cuttlebone that is much smaller than their mantle. Characteristic of cephalopods, chitin is present as a thin film covering the entire dorsal surface of the cuttlebone and tapers into a sharp point on the dorsal corner.[4] The anterior surface of the cuttlebone is entirely covered in chitin; the posterior surface is calcareous. The paintpot cuttlefish is mostly darkly colored with bright yellow spots on the head, dorsal side of mantle, and arms. The protective membranes on the arms are red.[5] Like most other species of cuttlefish, Metasepia tullbergi have hundreds of chromatophores covering the surface of their skin allowing them to change color and texture quickly. This ability has been exploited for use in neurology research.[6][7]
The paintpot cuttlefish is typically found in the Indo-Pacific seas surrounding Japan, China and Korea. Sightings have been recorded in Japan from southern Honshu, the Sea of Japan, Yellow Sea, East China Sea to Taiwan and Hong Kong, South China Sea, the Philippines and the Gulf of Thailand.[8]
The paintpot cuttlefish is found in the continental shelf between 20 and 100 meters deep on sandy to muddy substrate or on sea pens in rocky substrate. Eggs are laid in rocky areas at around 20 meters deep and hatch during the summer. Freshly hatched cuttlefish migrate to 80 meters depth in sandy-mud areas from August to September to grow and develop. The mature individuals then migrate to shallower areas in March to spawn.[4][5]
Like all members of class Cephalopoda, paintpot cuttlefish are gonochoric. Each individual is either male or female. Male individuals have sperm stored in the hectocotylus, a modified arm organ that specialized to store and transfer spermatophores to a female. Males perform various displays to attract a female for copulation during which they insert their hectocotylus into a female’s mantle cavity and fertilize the eggs. Embryos hatch and live as plankton in the water column for several weeks before becoming benthic adults.[4]
The paintpot cuttlefish was used as a research specimen to analyze how neuronal activity may propagate through the body. One phenomenon that many cephalopods share is the ability for their skin to change colors due to the presence of chromatophores on their skin. The change of color is activated by an action potential traveling through the cephalopod skin. Because all neural activity in biological systems are controlled by the propagation of action potentials, neuroscientists are especially interested in this visual representation of action potential propagation. As a cephalopod changes colors, a dark band travels across the animal’s body in a coordinated pattern called “passing clouds”.[7] The paintpot cuttlefish is especially conducive to this kind of research due to their small size, slow speed and the frequency of the passing clouds display. The results of this study concluded that the passing clouds phenomenon was a result of central wave generation indicating that the action potential originated at a single point controller. This may indicate that cephalopods may have a central nervous system similar to humans which can lead to larger implications in neuroscience.[6]
The paintpot cuttlefish (Metasepia tullbergi) is a small, poorly researched species of cuttlefish found in the Indo-Pacific, between Japan and Hong Kong. It is one of the two species classified in the genus Metasepia. Metasepia cuttlefish are characterized by their small, thick, diamond-shaped cuttlebone, and distinctive body coloration.
Paintpot cuttlefish are a slow-moving, bottom-dwelling species in the neritic zone and found at a depth of 20 to 100 meters in subtropical climates. Their mantle is about 70mm long and they can weigh from 30 to 40 grams. They have a broad, oval-shaped mantle with 10 to 13 pores on each side. Their fins are joined in the back of the animal with arms located on the opposite end of the fish. Their arms typically have 10 to 12 rows of shorter suckers followed by larger ones and then tapering in size through to the arm tip. The hectocolytus (male sperm) is present in the left ventral arm. Unlike other species of cuttlefish, Metasepia have a cuttlebone that is much smaller than their mantle. Characteristic of cephalopods, chitin is present as a thin film covering the entire dorsal surface of the cuttlebone and tapers into a sharp point on the dorsal corner. The anterior surface of the cuttlebone is entirely covered in chitin; the posterior surface is calcareous. The paintpot cuttlefish is mostly darkly colored with bright yellow spots on the head, dorsal side of mantle, and arms. The protective membranes on the arms are red. Like most other species of cuttlefish, Metasepia tullbergi have hundreds of chromatophores covering the surface of their skin allowing them to change color and texture quickly. This ability has been exploited for use in neurology research.
Metasepia tullbergi
La seiche encrier (Metasepia tullbergi) est une espèce de seiche qui vit dans les mers entre le Japon et Hong Kong.
Metasepia tullbergi
La seiche encrier (Metasepia tullbergi) est une espèce de seiche qui vit dans les mers entre le Japon et Hong Kong.
Metasepia tullbergi is een soort in de taxonomische indeling van de inktvissen, een klasse dieren die tot de stam der weekdieren (Mollusca) behoort. De inktvis komt enkel in zout water voor en is in staat om van kleur te veranderen. Hij beweegt zich voort door water in zijn mantel te pompen en het er via de sifon weer krachtig uit te persen. De inktvis is een carnivoor en zijn voedsel bestaat voornamelijk uit vis, krabben, kreeften en weekdieren die ze met de zuignappen op hun grijparmen vangen.
De inktvis komt uit het geslacht Metasepia en behoort tot de familie Sepiidae. Metasepia tullbergi werd in 1886 beschreven door Adolf Appellöf.[1]
Bronnen, noten en/of referenties图氏后乌贼（学名：Metasepia tullbergi）、又稱櫻花烏賊、櫻花枝、圖氏後烏賊，为烏賊目烏賊科后乌贼属的动物。看似有毒，其實有毒的一种乌贼，普遍分布于日本群岛南部海域，包括东海、南海等海域，生活环境为海水，多生活于亚热带浅海。该物种的模式产地在日本长崎。[1] 。
