Overview

Distribution

North Pacific: Hokkaido, Japan to the Bering Sea.
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Western North Pacific.
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Physical Description

Morphology

Dorsal spines (total): 11 - 12; Dorsal soft rays (total): 20 - 22; Analspines: 0; Analsoft rays: 14 - 19
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Size

Maximum size: 360 mm SL
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Max. size

36.0 cm SL (male/unsexed; (Ref. 559)); max. published weight: 800 g (Ref. 56557); max. reported age: 12 years (Ref. 56557)
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Diagnostic Description

Three zonal scale rows on body; a scale row of small ctenoid scales under the ventral scale row (Ref. 559). Four preopercular spines, the 2nd longest and simple, the 4th flattened; the first dorsal spine longer than the 2nd (Ref. 559).
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Type Information

Cotype for Hemilepidotus gilberti
Catalog Number: USNM 50916
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Preparation: Illustration
Collector(s): D. Jordan & J. Snyder
Locality: Hakodate, Hokkaido, Japan, Hokkaido, Hokkaido Prefecture, Japan, Pacific
  • Cotype:
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Ecology

Habitat

Environment

demersal; marine; depth range 0 - 604 m (Ref. 50550)
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Depth range based on 2 specimens in 1 taxon.
Water temperature and chemistry ranges based on 1 sample.

Environmental ranges
  Depth range (m): 60 - 97
  Temperature range (°C): 1.276 - 1.276
  Nitrate (umol/L): 26.164 - 26.164
  Salinity (PPS): 33.220 - 33.220
  Oxygen (ml/l): 6.801 - 6.801
  Phosphate (umol/l): 2.057 - 2.057
  Silicate (umol/l): 53.235 - 53.235

Graphical representation

Depth range (m): 60 - 97
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Life History and Behavior

Life Cycle

Oviparous. Non-copulatory. However according to one study, presence of fertilized eggs in the ovary may have resulted from spermatozoa entering the ovary through the ovarian fluid during spawning, and consequently fertilizing unspawned eggs in the ovaries (Ref. 47168). Fertilized eggs in the ovary develop abnormally however, due to the unavailability of needed elements such as oxygen in the ovary (Ref. 47168).
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Conservation

Threats

Not Evaluated
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Disclaimer

EOL content is automatically assembled from many different content providers. As a result, from time to time you may find pages on EOL that are confusing.

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