Lamna nasus, Porbeagle
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Lamna nasus (Bonnaterre, 1788)

Porbeagle
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Lamna nasus   AquaMaps   Data sources: GBIF OBIS
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Elasmobranchii (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);  nasus: Latin for nose, referring to moderately long conical snout. (See ETYFish).
More on author: Bonnaterre.

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

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Size / Weight / Age

Maturity: Lm 186.5, range 170 - 219 cm

Short description Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 0; Anal spines: 0; Anal soft rays: 0. A stout, spindle-shaped shark with large black eyes, a sharp, conical snout, long gill slits, and small, smooth-edged, narrow teeth with side cusps (Ref. 5578, 88171). Strong keels on the caudal peduncle, short secondary keels on the caudal base, and a crescentic caudal fin; the insertion of the small second dorsal fin is above the insertion of the anal fin (Ref. 88171). Dark grey dorsally, white ventrally, without blotches (Ref. 6581, 43278); rear tip of 1st dorsal abruptly white (Ref. 5578).

Biology     Glossary (e.g. epibenthic)

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

Distinct pairing with embrace (Ref. 205). Ovoviviparous (aplacental viviparity), with uterine cannibalism (embryos feeding on other ova produced by the mother (oophagy) after the yolk sac is absorbed) (Ref. 43278, 50449). With 1-5 (usually 4) pups in a litter (Ref. 6871, 43278). Reproduction probably yearly (Ref. 45602). In the northeast Atlantic, breeding grounds are off the coast of Europe and the British Isles. Embryos found in mature females throughout the year except from July to September. Mating occurs in late summer, pups are born in the spring of the following year (Ref. 43278). Gestation may last 8-9 months. Size at birth 60-80 cm TL (Ref. 6871, 43278).

Main reference Upload your references | References | Coordinator | Collaborators

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. 125652)


CITES


Threat to humans






Human uses

FAO - Fisheries: landings, species profile; Publication: search | FIRMS - Stock assessments | FishSource | Sea Around Us

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Internet sources

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Fisheries: landings, species profile; Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | National databases | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoological Record

Estimates based on models

Preferred temperature (Ref. 123201): 3.1 - 16.3, mean 7.8 °C (based on 1486 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.7813   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01047 (0.00612 - 0.01792), b=3.03 (2.88 - 3.18), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophic level (Ref. 69278):  4.6   ±0.0 se; based on diet studies.
Generation time: 9.5 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies.
Resilience (Ref. 120179):  Very Low, minimum population doubling time more than 14 years (K=0.12; tm=5; tmax=30; Fec=1-5).
Prior r = 0.05, 95% CL = 0.03 - 0.08, Based on 2 stock assessments.
Nutrients (Ref. 124155):  Calcium = 4.03 [0.57, 13.07] mg/100g ; Iron = 0.283 [0.072, 0.726] mg/100g ; Protein = 19.1 [16.9, 21.4] % ; Omega3 = 0.381 [0.167, 0.849] g/100g ; Selenium = 15.8 [4.5, 44.9] μg/100g ; VitaminA = 10.3 [2.7, 43.0] μg/100g ; Zinc = 0.211 [0.103, 0.411] mg/100g (wet weight); based on nutrient studies.