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Hymenocephalus striatulus
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drawing shows typical species in Macrouridae.
Classification / Names
Common names
|
Synonyms
| Catalog of Fishes(
genus
,
species
) |
ITIS
|
CoL
|
WoRMS
|
Cloffa
Teleostei (teleosts) >
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
)
.
More on author:
Gilbert
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; benthopelagic; depth range 101 - 800 m (Ref.
58302
). Deep-water
Eastern Central Pacific: known only from the Hawaiian Islands and Sala y Gomez Ridge.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 18.0 cm TL male/unsexed; (Ref.
9949
)
Short description
Morphology
|
Morphometrics
This species is distinguished by the following characters: pelvic fin rays 14-15; pectoral fin rays 15-18; projecting snout, 20-25% HL; rudimentary or very short barbel, 0-3% HL, does not reach vertical through anterior margin of orbit; moderate orbit diameter, 32-39% HL (usually 33-38%HL); infraorbital width 10-12% HL; moderately long preopercular supporter, with obtuse angle at rear margin, 3-4% HL; 25-29 gill rakers; ventral striae reaching to ½ from pelvic fin bases to periproct; otolith has moderately high predorsal lobe, with colliculi separated, closely placed across collum, terminating far from anterior and posterior rims of otolith; otolith length to height (OL:OH), 0.9-1.0; total colliculum length to pseudocolliculum length (TCL:PCL), 1.7-2.0 (Ref.
98298
).
Benthopelagic (Ref.
58302
). Feeds mainly on pelagic organisms, copepods (
Pleuromamma
sp.,
Oncaea conifera
,
Xanthocalanus
sp., Aetideidae spp.); also on small fish, chaetognaths, gammarids (Lysianassidae), shrimp (
Bentheogennema pasithea
), and mysids (
Paralophogaster glaber
); benthic polychaetes, including family Polinoidae (Ref.
9949
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Sazonov, Y.I. and T. Iwamoto
, 1992. Grenadiers (Pisces, Gadiformes) of the Nazca and Sala y Gomez ridges, southeastern Pacific. Proc. Calif. Acad. Sci. 48(2):27-95. (Ref.
9949
)
IUCN Red List Status (Ref.
130435
)
Not Evaluated
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Estimates based on models
Preferred temperature (Ref.
123201
): 5 - 15.2, mean 7.3 °C (based on 11 cells).
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
).
Trophic level (Ref.
69278
): 3.3 ±0.38 se; based on food items.
Resilience (Ref.
120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (10 of 100).
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Page last modified by :
mrius-barile
- 20 July 2016
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