Animalia > Chordata > Elasmobranchii > Lamniformes > Lamnidae > Lamna > Lamna ditropis

Lamna ditropis (Salmon shark; Porbeagle; Mackerel shark)

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Wikipedia Abstract

The salmon shark (Lamna ditropis) is a species of mackerel shark found in the northern Pacific ocean. As an apex predator, the salmon shark feeds on salmon, squid, sablefish, and herring. Salmon sharks are known for their ability to maintain stomach temperature (homeothermy), which is unusual among fish. The salmon shark has not been demonstrated to maintain a constant body temperature. The salmon shark is also known for an unexplained variability in the sex ratio between eastern and western populations in the northern Pacific.
View Wikipedia Record: Lamna ditropis


Adult Weight [1]  212.196 lbs (96.25 kg)
Female Maturity [1]  7 years 6 months
Litter Size [1]  5
Maximum Longevity [1]  20 years
Migration [2]  Oceanodromous

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Aleutian Islands Biosphere Reserve 2720489 Alaska, United States    
Gwaii Haanas National Park Reserve II 366714 British Columbia, Canada
Pacific Rim National Park Reserve II 137900 British Columbia, Canada
Sikhote-Alinskiy Biosphere Reserve 978001 Russia  

Prey / Diet

Prey / Diet Overlap


Homo sapiens (man)[4]


Parasitized by 
Anisakis simplex[5]
Hepatoxylon trichiuri[4]
Nybelinia palliata <Unverified Name>[5]
Nybelinia surmenicola[3]


Alaska (USA); California Current; Canada; East Bering Sea; Gulf of Alaska; Japan; Kamchatka; Korea, Dem. People's Rep; Korea, Republic of; Kuroshio Current; Mexico; 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).; Pacific Ocean; Pacific, Eastern Central; Pacific, Northeast; Pacific, Northwest; Russian Federation; Sea of Japan; Sea of Okhotsk; USA (contiguous states); West Bering Sea;

External References



Attributes / relations provided by
1de Magalhaes, J. P., and Costa, J. (2009) A database of vertebrate longevity records and their relation to other life-history traits. Journal of Evolutionary Biology 22(8):1770-1774
2Riede, Klaus (2004) Global Register of Migratory Species - from Global to Regional Scales. Final Report of the R&D-Projekt 808 05 081. 330 pages + CD-ROM
3Predation by Salmon Sharks (Lamna ditropis) on Pacific Salmon (Oncorhynchus spp.) in the North Pacific Ocean, Kazuya Nagasawa, NPAFC Bulletin No. 1 pp. 419-433 (1998)
4Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.
5Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
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