كاملات الرؤوس (chimaeras) >
Chimaeriformes (Chimaeras) >
Chimaeridae (Shortnose chimaeras or ratfishes)
Etymology: Hydrolagus: hydro-, combining form of hydor (Gr.), water; lagos (Gr.), hare, i.e., “water rabbit,” probably referring to three pairs of tooth plates, which tend to protrude from the mouth like a rabbit’s incisors. (See ETYFish); africanus: -anus (L.), belonging to: Africa, described from deep water off the KwaZulu-Natal South Coast of South Africa. (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
البيئة
بحري قاعية المعيشة; نطاق العمق 421 - 750 m (Ref. 3181). Deep-water
Western Indian Ocean: off Kenya, Mozambique and Natal, South Africa.
الحجم / وزن / العمر
Maturity: Lm ? range ? - ? cm
Max length : 67.0 cm TL ذكر/ مختلط الجنس; (Ref. 3181)
الأشواك الظهرية (المجموع) : 1; شوكة شرجية: 0; أشعه شرجية لينه: 0. A shortnose chimaera with the dorsal fin spine longer than the head; 2nd dorsal fin with distinct concavity in the middle (Ref. 5578).
Feeds on ophiuroids (Ref. 27637). Oviparous (Ref. 205). Eggs are encased in horny shells (Ref. 205).
Life cycle and mating behavior
Maturities | التكاثر | Spawnings | Egg(s) | Fecundities | Larvae
Compagno, L.J.V., 1986. Chimaeridae. p. 144-145. In M.M. Smith and P.C. Heemstra (eds.) Smiths' sea fishes. Springer-Verlag, Berlin. (Ref. 3181)
IUCN Red List Status (Ref. 130435)
استخدامات بشرية
مصائد: غير ذات اهمية
أدوات
تقارير خاصة
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مصادر علي الأنترنت
Estimates based on models
Preferred temperature (Ref.
123201): 8.9 - 11.4, mean 9.7 °C (based on 16 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00282 (0.00118 - 0.00673), b=3.10 (2.89 - 3.31), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
مستوى غذائي (Ref.
69278): 4.1 ±0.60 se; based on food items.
المرونه (Ref.
120179): منخفض, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 4.5-14 سنة (Assuming Fec <100).
Fishing Vulnerability (Ref.
59153): Moderate to high vulnerability (47 of 100).
