Mitsu chestnut shark
| Mitsu chestnut shark |
|---|
 Mitsu chestnut shark  Mitsukurina owstoni |
| Maintenance situation evaluation [1] |
| LEAST CONCERN (IUCN Red List Ver.3.1 (2001))  |
| Classification |
| Scientific name |
| Mitsukurina owstoni Jordan, 1898 |
| Japanese name |
| Mitsu chestnut shark (Mitsukuri shark) Long-nosed goblin shark |
| Fame |
| Goblin shark |
 Habitation area of the Mitsu chestnut shark |
The shark that the Mitsu chestnut shark (Mitsukuri shark, a scientific name: Mitsukurina owstoni British: Goblin shark) belongs to mouse shark eyes Mitsu chestnut shark department. The Mitsu chestnut shark department includes only this seed by the Mitsu chestnut shark genus Mitsukurina 1 genus. Rare species. Including Japanese Tokyo Bay, Gulf of Suruga, Gulf of Sagami, it is reported sporadically in all parts of the world. I inhabit the deep sea depth of the water 1,300m or more from the outer layer. Estimated 6m in total length. It features a blade-formed long rostrum (). There are many things which are in a state that a chin protruded in a photograph and the figure, but usually retires myself in the depths at the time of swimming.
Table of contents
Origin of the name
Scientific name Mitsukurina owstoni was given to Kakichi Mitsukuri (みつくりかきち) who was detector alane オーストン (A. Owston) and the first director of the Tokyo University Misaki marine laboratory. オーストン was a British trader, but I showed understanding for the study of the laboratory and seemed to often donate the creature which I captured in ドレッジ (net to collect the sea life which is in 深所 in particular). One day he collected the strange creature which had not seen the Gulf of Sagami during the navigation so far. After I was donated to a laboratory, it was confirmed to be a real new kind, and, as for the memorable first of this Mitsu chestnut shark, it was named Mitsukurina owstoni in 1898 by American ichthyologist, David star Jordan (David Starr Jordan).
I am called Goblin shark in English, but this is another name for this seed, translation of the long-nosed goblin shark [2].
Geographical distribution, biotope
There is a report from all parts of the world, but the appearance is rare. As for the past report, most are things from Japan [1]. I am seen well in Gulf of deep sea where the depth of the water including Gulf of Suruga in particular and the Gulf of Sagami becomes than 1,000m. In addition, many fries are found at the entrance of the Tokyo Bay submarine canyon (it is Tokyo or is and is dark) of the Chiba offing and may be caught in a net of the fishing. Off the northwest where 2003 did not have a report till then of Taiwan, very large number of Mitsu chestnut sharks more than 100 are fished [1]. Among others, habitation is confirmed in peripheral sea areas such as Australia in western Pacific and Atlantic Guiana, Bay of Biscay, Madeira, South Africa of the Indian Ocean. In the habitation depth of the water zone, deeper than 30-1300m [1].
Form
The maximum full length estimated 540-617cm [1]. The color of the body at the time of the survival is light pinkness tinged with the gray slightly, and brown becomes more sad posthumously when time passes. Blood vessel runs under the slightly transparent skin and brings about unique pinkness when it lives.
Relatively small dorsal fin two engines comprise a pectoral, a ventral, an anal fin at the back again. The tail and fins have a long superior lobe (for the first half), and the inferior lobe (for a lower half) is considerably shorter than a superior lobe. The shark having this type of tail and fins is often bottom by birth, and it is thought that I cannot swim so fast. I leave the characteristic of the ancient shark for health and am called the valid fossils. It greatly features a projecting flat rostrum (sharp part of the head tip). I comprise a lot of ロレンチニ pots of the electric receptor in the rostrum and am helpful to look for the bait of the bottom of the sea. Because it is cartilage characteristics, and the rostrum is flexible, I am not suitable to perform an attack and defense like a rostrum of sailfishs.
The Mitsu chestnut shark is often drawn with the figure which a chin projected forward, but it is a property that sharks are common to prominence in itself and have and does not deserve it if surprised so much. It will be described like that that a chin projects in the case of this seed easily and considerably conspicuously and is outstanding. The upper jaw curves and has a shape of the bill of the bird. The tooth of the first half part of the mouth is sharp for a long time and the surface is smooth and turns for the inside. The tooth of the latter half is suitable for it to crunch a thing slightly briefly.
When the Mitsu chestnut shark is lifted upside down on board, a chin protrudes, and a large number of sharp teeth show it in the mouth such as the bill (bill). The face goes up because of the weight of oneself, and the flabby soft body changes color in brown in a moment, and a whole body is dyed red by massive hemorrhage more (for deep sea habitation, it is said that it depends on presence, a change of the neighboring water pressure with the unloading).
Habits
The Mitsu chestnut shark finds out the bait creature of the bottom of the sea using the long rostrum, and it is thought that I let the chin greatly project and arrest game and is supposed when I work because the tooth such as the splinter which lengthened keenly for a long time does not miss the game which I added more to bite meat. The thing having a hard shell eats crab with a back tooth in plain words. The bait is deep sea-related Crustacea and Cephalopoda, Teleostei and other sharks mainly.
The male maturity size 264cm in total length, the female 335cm in total length [3]. The pregnancy female is not known, but is expected with an egg food type seen in mouse shark eyes widely [1].
Relation with the person
A variety program of TBS which was broadcasted on May 15, 2010 when "NHK is special" broadcasted (2008) on August 31 in 2008 "jump out; the scene that bit the arm of the diver was broadcasted, but Mitsu chestnut shark braced it among science" daringly because this checked the movement of the chin of the shark, and there is not the thing harming for a person basically.
Although the living body display in the aquarium is extremely rare, it has difficulty in long-term breeding. There are several times of living body display results in Tokai University oceanography Museum (Shizuoka) and Numazu Port deep sea aquarium (Shizuoka), bubble island Mali park (Shizuoka), Izu three Tsu Sea Paradise (Shizuoka), Kasai seaside aquatic animal garden (Tokyo), new Enoshima Aquarium (Kanagawa).
An aquarium and the museum of all parts of the world own the stuffed animal specimen. I perform the sale in a part. In Japan, I can see it in しながわ aquarium (Tokyo), Keihin Electric Express Aburatsubo Marine Park (Kanagawa), Hayama しおさい Museum (Kanagawa), world stag beetle Museum (Saitama), Gulf of Suruga deep sea creature Museum (Shizuoka). I display a liquid immersion specimen in the Tokai University oceanography Museum.
On November 13, 2013, it was discovered off Gulf of Sagami Nagai of Yokosuka-shi, Kanagawa that 13 Mitsu chestnut sharks hung to the gill net of the crab fishing installed in the bottom of the sea of depth of the water approximately 300m. I was thought to be a young mature form approximately approximately 1.5m in length, and 11 of them which lived at the time of discovery were transferred to Hakkeijima Sea Paradise and they bred it from November 14, the following day and were displayed [4]. All individuals died by the morning of November 18, 2013 and finished display [5]. I have plural breeding records as well as this in the aquarium. Five individuals approximately 1.5m are carried in to the aquarium (Shizuoka) in lower Tomi on December 24, 2016 and display three of them of those [6].
References
- ^ a b c d e f Duffy, C.A.J., Ebert, D.A. & Stenberg, C. 2004. Mitsukurina owstoni (Elfin Shark, Goblin Shark). In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.1. <www.iucnredlist.org>. Downloaded on 14 July 2011.
- ^ Castro, J.H. (2011). The Sharks of North America. Oxford University Press. pp. 202–205. ISBN 978-0-19-539294-4.
- ^ Leonard J. V. Compagno (2002) "Sharks of the world: An annotated and illustrated catalogue of shark species known to date" Volume 2, Food and Agriculture Organization of the United States. pp.69-71.
- Belonging to it in Gulf of ^ "Mitsu chestnut shark" Sagami at 17:44 on capture November 14, 2013 (NHK)
- ^ Living fossil "Mitsu chestnut shark" 2013November 18Reading
- ^ ""Devil 見参 Mitsu chestnut shark first display Shimoda underwater aquarium of the deep sea"". Shizuoka Shimbun NEWS (December 27, 2016). December 27, 2016 reading.
- For A&A, フェッラーリ "shark ray illustrated book Atsushi Mifune of shark guidebook - world", Tsuyoshi Yamamoto reason, Toru Taniuchi supervision, TBS.Britannica, 2,001 years, it is page 256.
Allied item
- Selachain
- Fish
- List of fish
- "The lah vs. I steal it deep sea monster ジグラ" - (it becomes the motif of ジグラ)
Outside link
- しながわ aquarium
- Keihin Electric Express Aburatsubo Marine Park
- Kasai seaside aquatic animal garden
- It is The IUCN Red List of Threatened Species (English) Mitsukurina owstoni (Elfin Shark, Goblin Shark)
This article is taken from the Japanese Wikipedia Mitsu chestnut shark
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