رده بندی / نامها
اسامي عام | مترادف | Catalog of Fishes(جنس, گونه ها) | ITIS | CoL | WoRMS | Cloffa
مارماهيان دهان گرد (hagfishes) >
Myxiniformes (Hagfishes) >
Myxinidae (Hagfishes) > Eptatretinae
Etymology: Eptatretus: hepta (Gr.), seven; tretos (Gr.), perforated (i.e., with holes), referring to seven gill apertures on what would later be described as Homea banksii (=E. cirrhatus) [range within genus is 6-14 pairs of gill apertures] (See ETYFish); bobwisneri: Replacement name of E. wisneri McMillan 1999, which became a junior homonym of Paramyxine wisneri Kuo, Huang & Mok 1994 when Paramyxine was subsumed into Eptatretus; the name continues to honor Robert (“Bob”) L. Wisner (1921-2005), McMillan’s colleague at Scripps Institution of Oceanography, for “invaluable” assistance with her hagfish research and other contributions to ichthyology (See ETYFish).
Eponymy: Robert ‘Bob’ Lester Wisner (1912–2005) was honoured for his “…valuable assistance with C.B. McMillan’s myxinid research as well as his other contributions to ichthyology.” (See Wisner, also see Fern) (Ref. 128868), visit book page.
محیط زیست: محیط زیست / منطقه آب و هوایی / تغييرات عمق / محدوده توزیع
بوم شناسي
دريايي موجوداتی که در اعماق زیر 200 متر زندگی و تغذیه می کنند; غير مهاجر; تغييرات عمق 512 - 577 m (Ref. 123790). Deep-water
Southeast Pacific: known only from the Galapagos Islands (Ref. 31788).
اندازه / وزن / سن
بلوغ: Lm ?  range ? - ? cm
Max length : 32.8 cm TL جنس نر / بدون خواص جنسي; (Ref. 31788); 35.6 cm TL (female)
توصيف مختصر
كليدهاي شناسايي | ريخت شناسي | ريخت ستجي بوسيله انداره گيري
This species is distinguished from its congeners except E. gomoni, E. luzonicus, E. octatrema, E. okinoseanus by the following characters: eight pairs of gill apertures that are well-spaced and arranged in an almost straight line; teeth 3/2 multicusps pattern; total cusps 44-47 (vs. 50 in E. gomoni, 38-40 in E. octatrema); prebranchial pores 9-11 (vs. 12-13 in E. gomoni, 22-26 in E. octatrema, 13-17 in E. okinoseanus); trunk pores 43-47 (vs. 57-58 in E. gomoni, 63-68 in E. octatrema, 54-61 in E. okinoseanus); total pores 73-76 (vs. 91-93 in E. gomoni, 77-82 in E. indrambaryai, 84-88 in E. luzonicus, 104-117 in E. octatrema, 87-97 in
E. okinoseanus); nasal-sinus papillae absent (vs. one single nasal-sinus papilla in E. luzonicus, two bilaterally symmetrical nasal-sinus papillae in E. octatrema) (Ref. 123790).
Body shape (shape guide): eel-like; Cross section: oval.
چرخه زندگی و رفتار جفتگیری
بلوغ | تولید مثل | تخم ریزی | تخم ها | باروری | توزاد ( لارو)
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 ).
McMillan, C.B., 1999. Three new species of hagfish (Myxinidae, Eptatretus) from the Galápagos Islands. Fish. Bull. 97:110-117. (Ref. 31788)
وضعيت در فهرست قرمز IUCN (Ref. 130435: Version 2025-2 (Global))
خطر برای انسان ها
Harmless
استفاده انسانی
ماهي گيري – شيلات: از بی علاقه گی
ابزارها
گزارش های ويژه
بارگيری XML
منابع اينترنتي
تخمینها بر اساس مدلها
شاخص تنوع فیلوژنتیکی (مرجع 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
|
Bayesian length-weight
|
a=0.00204 (0.00095 - 0.00440), b=2.93 (2.74 - 3.12), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
سطح تروفیک (مرجع 69278) |
4.0 ±0.7 se; based on size and trophs of closest relatives |
جهندگی (مرجع 120179) |
پايين ، كم, كمينه زمان لازم براي دو برابر شدن جمعيت 5/4 – 14 سال (Fec assumed to be <100). |
آسیبپذیری ماهیگیری (Ref. 59153) |
Low to moderate vulnerability (32 of 100). 🛈 |