Classification / Names
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Gadiformes (Cods) >
Macrouridae (Grenadiers or rattails)
Etymology: Hymenocephalus: Named for its transparent membrane-like head covering (‘‘hymen head’’) and fragile nature of head bones (Ref. 100825); sazonovi: Named for Yuri I. Sazonov (Moscow, Russia).
Environment: milieu / climate zone / depth range / distribution range
Ekologi
marina bentopelagisk; djupintervall 340 - 1100 m (Ref. 98298). Deep-water
Utbredning
Länder | FAO områden | Ekosystem | Förekomster | Point map | Utplanteringar | Faunafri
Eastern Pacific: probably endemic to the Nazca and Sala y Gomez ridges.
Size / Vikt / Age
Maturity: Lm ? range ? - ? cm
Max length : 13.1 cm TL hane/ej könsbestämd; (Ref. 98298)
Short description
Bestämningsnycklar | Morfologi | Morfometri
Taggstrålar i ryggfenan (totalt) : 2; Mjukstrålar i ryggfenan (totalt) : 9 - 10. This species is distinguished by the following characters: body much less slender than typical for the genus, with very thin head bones; pelvic fin rays 12-13; pectoral fin rays 15-16; gill rakers 18-20; no barbel; orbit 21% HL; blunt snout with high frontal ridge, barely protruding, short, 23% HL; ventral striae extending about ? distance from pelvic fin bases to periproct region; infraorbital canal is wider than other canal systems; very small preopercular supporter; otolith compressed (otolith length to height (OL:OH) is 0.8; colliculi separated and small; small pseudocolliculum, total colliculum length to pseudocolliculum length (TCL:PCL) is 1.8 (Ref. 98298).
Life cycle and mating behavior
Maturities | Reproduktion | Spawnings | Egg(s) | Fecundities | Larver
Schwarzhans, W., 2014. Head and otolith morphology of the genera Hymenocephalus, Hymenogadus and Spicomacrurus (Macrouridae), with the description of three new species. Zootaxa 3888(1):1-73. (Ref. 98298)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Verktyg
Special reports
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00219 (0.00111 - 0.00431), b=3.20 (3.03 - 3.37), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trofisk nivå (Ref.
69278): 3.3 ±0.4 se; based on size and trophs of closest relatives
Resiliens (Ref.
120179): Mellan, lägsta populationsfördubblingstid 1,4-4,4 år (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
