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Katsuwonus pelamis  (Linnaeus, 1758)

Skipjack tuna
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Image of Katsuwonus pelamis (Skipjack tuna)
Katsuwonus pelamis
Picture by Freitas, R.


Philippines country information

Common names: Agtun, Bangkulis, Bankulis
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: commercial | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: gamefish: yes;
Comments: Also Ref. 168, 393, 6565.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/rp.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Broad, G., 2003
National Database:

Classification / Names

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Scombridae (Mackerels, tunas, bonitos) > Scombrinae
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL

Main reference

Size / Weight / Age

Max length : 110 cm FL male/unsexed; (Ref. 89423); common length : 80.0 cm FL male/unsexed; (Ref. 168); max. published weight: 34.5 kg (Ref. 168); max. reported age: 12 years (Ref. 168)

Length at first maturity
Lm 40.0, range 40 - 45 cm

Environment

Marine; pelagic-oceanic; oceanodromous; depth range 0 - 260 m (Ref. 9340), usually 0 - ? m (Ref. 55287)

Climate / Range

Tropical; 15°C - 30°C (Ref. 168); 63°N - 47°S, 180°W - 180°E

Distribution

Cosmopolitan in tropical and warm-temperate waters. Not found in the Black Sea. Highly migratory species, Annex I of the 1982 Convention on the Law of the Sea (Ref. 26139).
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 14 - 16; Dorsal soft rays (total): 14-15; Anal spines: 0; Anal soft rays: 14 - 15; Vertebrae: 41. Interpelvic process small and bifid. Body without scales except for the corselet and the lateral line. Swim bladder absent. The back is dark purplish blue, lower sides and belly silvery, with 4 to six very conspicuous longitudinal dark bands which in live specimens may appear as continuous lines of dark blotches.

Biology     Glossary (e.g. epibenthic)

Found in offshore waters; larvae restricted to waters with surface temperatures of 15°C to 30°C (Ref. 6390). Exhibit a strong tendency to school in surface waters with birds, drifting objects, sharks, whales and may show a characteristic behavior like jumping, feeding, foaming, etc. Feed on fishes, crustaceans, cephalopods and mollusks; cannibalism is common. Spawn throughout the year in the tropics, eggs released in several portions (Ref. 35388). Eggs and larvae are pelagic (Ref. 6769). Preyed upon by large pelagic fishes (Ref. 6885). Also taken by trolling on light tackle using plugs, spoons, feathers, or strip bait (Ref. 9684). Marketed fresh, frozen or canned (Ref. 9340); also dried-salted and smoked (Ref. 9987).

IUCN Red List Status (Ref. 115185)

Threat to humans

  Reports of ciguatera poisoning (Ref. 4690)



Human uses

Fisheries: highly commercial; gamefish: yes

Tools

Special reports

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Internet sources

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805)
PD50 = 1.0000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Trophic Level (Ref. 69278)
4.4   ±0.5 se; Based on diet studies.

Resilience (Ref. 69278)
Medium, minimum population doubling time 1.4 - 4.4 years (K=0.3-0.5; tm=2-3; tmax=12; Fec=61,516)

Vulnerability (Ref. 59153)
Moderate vulnerability (38 of 100)
Price category (Ref. 80766)
High