Common names from other countries
分類 / Names
共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa
メクラウナギ (hagfishes) >
Myxiniformes (Hagfishes) >
Myxinidae (Hagfishes) > Myxininae
Etymology: Myxine: Ancient Greek word for a slimy fish: myxa, slime; -inus, one who, referring to copious amounts of slime produced by M. glutinosa. (See ETYFish); glutinosa: Latin for viscous or sticky, referring to its seeming ability to turn water into slime. (See ETYFish).
More on author: Linnaeus.
Environment: milieu / climate zone / depth range / distribution range
生態学
海 深海魚; 移住性ではない; 深さの範囲 20 - 1200 m (Ref. 117245), usually 27 - 460 m (Ref. 119696). Boreal; 2°C - 13°C (Ref. 119696); 72°N - 24°N, 89°W - 41°E
North Atlantic: Murmansk to the Mediterranean Sea; Greenland to USA. Absent in eastern Mediterranean and Black Sea. Only hagfish in the Northeast Atlantic.
Length at first maturity / サイズ / 重さ / 年齢
Maturity: Lm ?, range 25 - ? cm
Max length : 95.0 cm TL オス/雌雄の選別がない; (Ref. 119696); common length : 30.0 cm TL オス/雌雄の選別がない; (Ref. 35388); common length :40 cm TL (female)
Jawless mouth, single nasal aperture, only a single pair of external gill openings, no operculum or covering fold of skin. Grayish or reddish brown above, either plain. Variations in color correspond to the color of the sea bottom.
Benthic with reported depths to 782 off Greenland; 960 m in Northwestern Atlantic; and 1,100 m off Norway (Ref. 119696). Found on muddy bottoms where they hide in the mud. Slime is used for defense. Feeds chiefly on dead and dying fish of varying species by boring into the body and consuming viscera and musculature. Chiefly nocturnal. Its eggs are few in number about 19-30 and large (20-25 mm), the horny shell has a cluster of anchor-tipped filaments at each end.
Copulatory organ absent. The gonads of hagfishes are situated in the peritoneal cavity. The ovary is found in the anterior portion of the gonad, and the testis is found in the posterior part. The animal becomes female if the cranial part of the gonad develops or male if the caudal part undergoes differentiation. If none develops, then the animal becomes sterile. If both anterior and posterior parts develop, then the animal becomes a functional hermaphrodite. However, hermaphroditism being characterised as functional needs to be validated by more reproduction studies (Ref. 51361 ). Probably breed throughout the year in deep water (Ref. 35388).
Fernholm, B., 1998. Hagfish systematics. p. 33-44. In J.M. Jørgensen, J.P. Lomholt, R.E. Weber and H. Malte (eds.) The biology of hagfishes. Chapman & Hall, London. 578 p. (Ref. 31276)
CITES (Ref. 128078)
Not Evaluated
Human uses
水産業: 興味がない
用具
特記事項
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インターネットの情報源
Estimates based on models
Preferred temperature (Ref.
115969): 1 - 10.2, mean 5.3 (based on 550 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00115 (0.00045 - 0.00296), b=3.03 (2.80 - 3.26), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
栄養段階 (Ref.
69278): 4.5 ±0.0 se; based on diet studies.
回復力 (Ref.
120179): 低い, ４．５年～１４年の倍増期間の最小個体群 (Fec= 20-30).
Prior r = 0.10, 95% CL = 0.07 - 0.15, Based on 1 full stock assessment.
Fishing Vulnerability (Ref.
59153): High vulnerability (58 of 100).
Climate Vulnerability (Ref.
125649): Moderate vulnerability (38 of 100).
