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Nesiarchus nasutus  Johnson, 1862

Black gemfish
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Nesiarchus nasutus   AquaMaps   Data sources: GBIF OBIS
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Image of Nesiarchus nasutus (Black gemfish)
Nesiarchus nasutus
Picture by Román Marcote, E.

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Gempylidae (Snake mackerels)
Etymology: Nesiarchus: Greek, nesiarches = governor of an island (Ref. 45335).

Environment / Climate / Range Ecology

Marine; benthopelagic; depth range 200 - 1200 m (Ref. 6181).   Deep-water; 70°N - 47°S, 180°W - 180°E

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 130 cm SL male/unsexed; (Ref. 6181); common length : 80.0 cm SL male/unsexed; (Ref. 6181)

Short description Morphology | Morphometrics

Dorsal spines (total): 20 - 22; Dorsal soft rays (total): 19-24; Anal spines: 2; Anal soft rays: 18 - 21; Vertebrae: 34 - 36. Body fairly elongate and strongly compressed. Mouth with fang-like teeth. The tips of both jaws with dermal processes. Gill rakers degenerated. Color is dark brown with violet tint; fin membranes black; margin of anus black (Ref. 6181).

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions | Faunafri

Probably distributed worldwide in tropical and subtropical seas except in eastern Pacific and northern Indian oceans. Large-sized individuals stray in cold-temperate waters off Iceland, Norway, northern Japan and southern New Zealand (Ref. 6181). Reported from 19°41'S, 79°11'W (Ref. 11892).

Biology     Glossary (e.g. epibenthic)

Adults, benthopelagic to mesopelagic, dwell on the continental slope or underwater rises, migrating to midwater at night (Ref. 6181). Eggs are pelagic (Ref. 6766). Larvae and juveniles, epipelagic to mesopelagic, are rather common in oceanic ichthyoplankton and are only found in the tropics (Ref. 6181). Feed on squid, fish and crustaceans (Ref. 6181). Consumed as food (Ref. 4537).

Main reference Upload your references | References | Coordinator : Parin, Nikolay V. | Collaborators

Nakamura, I. and N.V. Parin, 1993. FAO Species Catalogue. Vol. 15. Snake mackerels and cutlassfishes of the world (families Gempylidae and Trichiuridae). An annotated and illustrated catalogue of the snake mackerels, snoeks, escolars, gemfishes, sackfishes, domine, oilfish, cutlassfishes,. scabbardfishes, hairtails, and frostfishes known to date. FAO Fish. Synop. 125(15):136 p.

IUCN Red List Status (Ref. 90363)

Threat to humans

  Harmless




Human uses

Fisheries: minor commercial
FAO(Publication : search) | FisheriesWiki | Sea Around Us

More information

Countries
FAO areas
Ecosystems
Occurrences
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Stocks
Ecology
Diet
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Common names
Synonyms
Metabolism
Predators
Ecotoxicology
Reproduction
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Fecundity
Eggs
Egg development
Age/Size
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Length-weight
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Length-frequencies
Morphometrics
Morphology
Larvae
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Ciguatera
Speed
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Gill area
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Internet sources

BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | iSpecies | National databases | PubMed | Scirus | SeaLifeBase | Tree of Life | uBio | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates of some properties based on empirical models

Phylogenetic diversity index (Ref. 82805):  PD50 = 1.0000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00398 (0.00193 - 0.00819), b=3.11 (2.92 - 3.30), based on LWR estimates for this Subfamily-BS (Ref. 93245).
Trophic Level (Ref. 69278):  4.3   ±0.71 se; Based on food items.
Resilience (Ref. 69278):  Very Low, minimum population doubling time more than 14 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153):  High to very high vulnerability (73 of 100) .
Price category (Ref. 80766):   Unknown.