Nansenia ahlstromi

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Nansenia ahlstromi Kawaguchi & Butler, 1984

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Nansenia ahlstromi   AquaMaps   Data sources: GBIF OBIS
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drawing shows typical species in Microstomatidae.

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Argentiniformes (Marine smelts) > Microstomatidae (Pencil smelts)
Etymology: ahlstromi: Named for E.H. Ahlstrom.
Eponymy: Fridtjof Nansen (1861–1930) was a Norwegian explorer, scientist, diplomat and later recipient of the Nobel Peace Prize. [...] Dr Elbert Halvor Ahlstrom (1910–1979) was an ichthyologist and biologist who spent more than four decades working for the National Fisheries Service. [...] (Ref. 128868), visit book page.

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

Marine; bathypelagic; depth range 0 - 754 m (Ref. 5123). Deep-water; 35°N - 20°N

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

Indo-West Pacific.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 9.5 cm SL male/unsexed; (Ref. 5123)

Short description Identification keys | Morphology | Morphometrics

Dorsal soft rays (total): 8 - 9; Anal soft rays: 7 - 8; Vertebrae: 35 - 36. Head relatively large than body; eye large. Branchiostegal rays 3. Ratio of caudal peduncle length to caudal peduncle depth less than 1.5 (Ref. 5123).
Body shape (shape guide): elongated; Cross section: oval.

Biology     Glossary (e.g. epibenthic)

The holotype which is about 9.5 cm SL is an adult bearing eggs (Ref. 5123).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Kawaguchi, K. and J.L. Butler, 1984. Fishes of the genus Nansenia (Microsomatidae) with descriptions of seven new species. Los Angeles County Mus. Contr. Sci. 352:1-22. (Ref. 5123)

IUCN Red List Status (Ref. 130435: Version 2025-1)

Not Evaluated 

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

FAO - Publication: search | FishSource |

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Internet sources

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.2   ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100). 🛈