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Scombriformes (Mackerels) >
Icosteidae (Ragfish)
Etymology: Icosteus: Greek, eikoo = to sag, to bend something that is soft + Greek, osteon = bone.
Environment: milieu / climate zone / depth range / distribution range
البيئة
بحري مياه عميقة; نطاق العمق 0 - 1420 m (Ref. 50550), usually 18 - 732 m (Ref. 2850). Deep-water; 66°N - 32°N
North Pacific: Japan to southeastern Alaska and to Point Loma, southern California, USA.
الحجم / وزن / العمر
Maturity: Lm ? range ? - ? cm
Max length : 213 cm TL ذكر/ مختلط الجنس; (Ref. 2850)
الأشواك الظهرية (المجموع) : 0; الأشعة الظهرية الناعمة (المجموع) : 52 - 55; شوكة شرجية: 0; أشعه شرجية لينه: 34 - 40. Pectorals rounded, pedunculate (Ref. 6885). Generally of a chocolate color (Ref. 6885). Young more robust, with an expanded and rounded caudal fin, 5 pelvic rays, and a brown and yellow irregularly blotched with faint purple color, dusky on fins (Ref. 6885).
Adults occur near bottom; juveniles in shallow water or offshore near the surface (Ref. 50277). Feeds on jellyfish (Ref. 50277), fishes and squids (Ref. 2850), as well as octopuses (Ref. 4525).
Eschmeyer, W.N., E.S. Herald and H. Hammann, 1983. A field guide to Pacific coast fishes of North America. Boston (MA, USA): Houghton Mifflin Company. xii+336 p. (Ref. 2850)
IUCN Red List Status (Ref. 130435: Version 2024-1)
استخدامات بشرية
مصائد:
أدوات
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مصادر علي الأنترنت
Estimates based on models
Preferred temperature (Ref.
123201): 2 - 14.1, mean 6.2 °C (based on 1370 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 1.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01995 (0.00906 - 0.04395), b=3.01 (2.83 - 3.19), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
مستوى غذائي (Ref.
69278): 4.5 ±0.57 se; based on food items.
Generation time: 8.5 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
المرونه (Ref.
120179): منخفض, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 4.5-14 سنة (K=0.13; Fec=293,000).
Fishing Vulnerability (Ref.
59153): High to very high vulnerability (71 of 100).
