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होलोसैफली (किमाइरस) (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); melanophasma: melanos (Gr.), black, referring to color in life; phasma (Gr.), ghost or specter, alluding to the vernacular “ghostshark” (literally, a black ghost) (See ETYFish).

Environment: milieu / climate zone / depth range / distribution range पारिस्थितिकी

समुद्री बाथीड़िमरसल; गहराई सीमा 2 - 1720 m (Ref. 93040), usually 565 - 1720 m (Ref. 93040). Subtropical; 35°N - 40°S, 125°W - 70°W (Ref. 93040)

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Eastern Pacific Ocean: From Baja California, Mexico to Validivia, Chile.

आकार / वज़न / Age

Maturity: L_m ? range ? - ? cm
Max length : 120 cm TL पुल्लिंग / अलिंग; (Ref. 82286)

Short description पहचान कुंजी | आकृति विज्ञान | मौरफोमैटरिक्स

A species of the genus Hydrolagus based on the absence of an anal fin. Hydrolagus melanophasma sp. nov. is distinguished from other chimaeroids by a blunt snout with minimal sloping from the orbit to the snout tip, a large slightly curved dorsal fin spine (25.9 % BDL) extending beyond first dorsal fin apex, and a long second dorsal fin (77.3–81.1% BDL) of uniform height throughout. The pectoral fins are large, reaching beyond the pelvic fin insertion when laid flat, trifid claspers forked for 27–27.8% of the total clasper length and the preopercular and oral lateral line canals branch separately or together from the infraorbital canal. Coloration after preservation is a uniform black with no distinct mottling or markings (Ref. 82286).

Life cycle and mating behavior परिपक्व अवधि | पुनरुत्पत्ति | मछलीऔ का अंडे देना | अंडे | Fecundity | लार्वा

Main reference Upload your references | संदर्भ | संयोजक | सहयोगीयो

James, K.C., D.A. Ebert, D.J. Long and D.A. Didier, 2009. A new species of chimaera, Hydrolagus melanophasma sp. nov. (Chondrichthyes: Chimaeriformes: Chimaeridae), from the eastern North Pacific. Zootaxa 2218:59-68. (Ref. 82286)

IUCN Red List Status (Ref. 130435: Version 2024-1)

Least Concern (LC) ; Date assessed: 02 September 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

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इंटरनेट स्रोत

Estimates based on models

Preferred temperature (Ref. 123201): 2.6 - 6.5, mean 3.9 °C (based on 154 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00331 (0.00137 - 0.00798), b=3.07 (2.86 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 4.0 ±0.6 se; based on size and trophs of closest relatives

लौटाव (Ref. 120179): बहुत नीचे, न्यूनतम जनसंख्या दुगनी समय अवलागत 14 महीने। (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): High to very high vulnerability (72 of 100).

Nutrients (Ref. 124155): Calcium = 17.4 [4.7, 51.6] mg/100g; Iron = 0.615 [0.214, 2.960] mg/100g; Protein = 16.4 [10.7, 19.5] %; Omega3 = 0.285 [0.125, 0.653] g/100g; Selenium = 54.7 [14.2, 174.3] μg/100g; VitaminA = 9.72 [2.86, 35.69] μg/100g; Zinc = 0.566 [0.279, 1.093] mg/100g (wet weight);

Hydrolagus melanophasma James, Ebert, Long & Didier, 2009