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Lamna ditropis Hubbs & Follett, 1947

Salmon shark
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Lamna ditropis   AquaMaps   Data sources: GBIF OBIS
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Lamna ditropis
Picture by Murch, A.


Japan country information

Common names: Nezumizame
Occurrence: native
Salinity: marine
Abundance: common (usually seen) | Ref: Sokolovskaya, T.G., A.S. Sokolovskii and E.I. Sobolevskii, 1998
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Occurs in northern Japan. Also occurs in Peter the Great Bay, Sea of Japan (Ref. 27683). Also Ref.11634, 43278, 96339, 43939.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ja.html
National Fisheries Authority: http://www.maff.go.jp/eindex.html
Occurrences: Occurrences Point map
Main Ref: Sokolovskaya, T.G., A.S. Sokolovskii and E.I. Sobolevskii, 1998
National Database:

Common names from other countries

Classification / Names Nombres comunes | Sinónimos | Catalog of Fishes(Género, Especie) | ITIS | CoL | WoRMS | Cloffa

Elasmobranquios (tiburones y rayas) (sharks and rays) > Lamniformes (Mackerel sharks) > Lamnidae (Mackerel sharks or white shark)
Etymology: Lamna: From the Greek lamia, a large and voracious shark, originally from Lamia in Greek mythology, daughter of King Belos, who revenged the murder of her children by killing the children of others, and who behaved so cruelly that her face turned into a nightmarish mask. (See ETYFish);  ditropis: di-, from dis (L.), in two; tropis (Gr.), keel, i.e., double-keeled, referring to the rudder-like projections on either side of tail. (See ETYFish).
  More on authors: Hubbs & Follett.

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

marino; oceanodromo (Ref. 51243); rango de profundidad 0 - 650 m (Ref. 50550), usually 0 - 152 m (Ref. 55221).   Boreal; 66°N - 22°N, 120°E - 115°W

Distribución Países | Áreas FAO | Ecosistemas | Ocurrencias, apariciones | Point map | Introducciones | Faunafri

North Pacific: Japan, Korea, and the Sea of Okhotsk to the Bering Sea and southward to southern California, USA (Ref. 247) and Baja California, Mexico (Ref. 9253).

Length at first maturity / Tamaño / Peso / Age

Maturity: Lm ?  range ? - 221 cm
Max length : 305 cm TL macho / no sexado; (Ref. 247); common length : 180 cm TL macho / no sexado; (Ref. 9988); peso máximo publicado: 175.0 kg (Ref. 9988); edad máxima reportada: 27 años (Ref. 119696)

Short description Claves de identificación | Morfología | Morfometría

Espinas dorsales (total) : 0; Espinas anales: 0. First dorsal fin uniformly dark, no light rear tip; ventral surface of body white with dusky blotches (Ref. 247).

Biología     Glosario (por ej. epibenthic)

A coastal-littoral and epipelagic shark that prefers boreal to cool temperate waters, from the surface to at least 152 m, and is common in continental offshore waters but range inshore to just off beaches. Occurs singly or in schools or feeding aggregations of several individuals; feeds on fishes (Ref. 247). Seasonally migratory (following food prey) and segregate by age and sex where adults move further north than young (Ref. 58085). Ovoviviparous, embryos feeding on yolk sac and other ova produced by the mother (Ref. 50449). With up to 4 young in a litter (Ref. 247). Fast swimmer (Ref. 9988). Potentially dangerous but has never or seldom been implicated in human attacks (Ref. 247). Causes considerable damage to commercial catches and gear (Ref. 6885). Utilized fresh, dried or salted, and frozen; fins, hides and livers are also used, with fins having particular value; can be broiled and baked (Ref. 9988). Reported to attain at least 27 years of age and reach maximum depth of at least 792 m (in Ref. 119696).

Life cycle and mating behavior Maturities | Reproducción | Spawnings | Egg(s) | Fecundities | Larva

Exhibit ovoviparity (aplacental viviparity), with embryos feeding on other ova produced by the mother (oophagy) after the yolk sac is absorbed (Ref. 50449). Litter size is up to 4 young (Ref. 247). Distinct pairing with embrace (Ref. 205).

Main reference Upload your references | Referencias | Coordinador : Compagno, Leonard J.V. | Colaboradores

Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO. (Ref. 247)

IUCN Red List Status (Ref. 130435)

  Least Concern (LC) ; Date assessed: 06 November 2018

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Traumatogenic




Human uses

Pesquerías: escaso valor comercial; pesca deportiva: si
FAO(pesquerías: species profile; publication : search) | FishSource |

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Estimates based on models

Preferred temperature (Ref. 115969): 1.7 - 8.7, mean 4.7 (based on 832 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.7813   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00933 (0.00405 - 0.02151), b=3.04 (2.84 - 3.24), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Nivel trófico (Ref. 69278):  4.5   ±0.80 se; based on food items.
Resiliencia (Ref. 120179):  Muy bajo, población duplicada en un tiempo mínimo superior a 14 años (Fec=4).
Fishing Vulnerability (Ref. 59153):  High vulnerability (59 of 100).
Price category (Ref. 80766):   Unknown.