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

Teleostei (teleosts) > Osmeriformes (Freshwater smelts) > Osmeridae (Smelts)
Etymology: Hypomesus: Greek, hypo = under + Greek,mesos = a half (Ref. 45335).

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

Freshwater; brackish; pelagic; anadromous (Ref. 51243). Temperate; 73°N - 38°N (Ref. 26213)

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

North America: Sacramento-San Joaquin Delta region in central California, USA.

Length at first maturity / Size / Weight / Age

Maturity: L_m ?, range 6 - ? cm
Max length : 12.0 cm TL male/unsexed; (Ref. 5723); common length : 6.3 cm TL male/unsexed; (Ref. 12193); max. reported age: 1.00 years (Ref. 12193)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 9 - 11; Anal spines: 0; Anal soft rays: 16 - 20; Vertebrae: 52 - 57. Vomer without posterior process; periphery of glossohyal bone with single row of conical teeth, central part toothless; pyloric caeca 4(2-5); base of adipose fin more than 20% of head length; eye large; adipose eyelid poorly developed.

Adults occur in open brackish and freshwater of large channels. Diet consists of zooplankton (Ref. 33312).

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

Eggs are demersal (Ref. 33312).

Main reference Upload your references | References | Coordinator | Collaborators

Saruwatari, T., J.A. López and T.W. Pietsch, 1997. A revision of the ormerid genus Hypomesus Gill (Teleostei: Salmoniformes), with a description of a new species from the southern Kuril Islands. Species Diversity 2:59-82. (Ref. 33312)

IUCN Red List Status (Ref. 130435: Version 2024-2)

Critically Endangered (CR) (A2bce); Date assessed: 17 February 2012

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

More information

Trophic ecology
Food items
Diet composition
Food consumption
Food rations
Predators

Ecology
Ecology

Population dynamics
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
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Abundance

Life cycle
Reproduction
Maturity
Maturity/Gills rel.
Fecundity
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Eggs
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Larvae
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Distribution
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Anatomy
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Physiology
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Genetics
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Internet sources

Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5313 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00372 (0.00178 - 0.00775), b=3.17 (2.99 - 3.35), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.2 ±0.1 se; based on diet studies.

Resilience (Ref. 120179): High, minimum population doubling time less than 15 months (tm=1; tmax=1).

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

Hypomesus transpacificus McAllister, 1963