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Euthynnus affinis (Cantor, 1850)
MACKEREL TUNA
Bonito; Jack Mackerel; Kawa Kawa; Kawakawa; Little Tuna; Little Tunny; Euthynnus alleteratus affinis Cantor, 1850; Euthynnus wallisi Whitley, 1937; Euthynnus alletteratus Rafinesque, 1810; Wanderer wallisi Whitley, 1937; Thynnus affinis Cantor, 1850; Kawakawa -

Life   Vertebrata   Fish   Scombridae   Euthynnus

Euthynnus affinis
© Copyright John Rangall, 2006 · 0
Euthynnus affinis

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  • Australian Faunal Directory
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Overview
Main identification features
  • lines on back: ~12 oblique
Kawakawa

Two small keels on tail base separated by a third, large keel; no adipose eyelids; jaw teeth slender, conical; corselet of large, thickened scales on front body, with body scaleless behind corselet; top of tongue with cartilaginous crests; pectorals 25-29 rays; ~9 dorsal finlets and ~7 anal finlets; small gap between 2 dorsal fins; first gill arch with 29-33 rakers.

Bluey above, silvery below; a cluster of black spots on belly above pelvic fin; ~12 oblique dark lines on upper back behind corselet.

Size: 110 cm; at least 13.2 kg.

Habitat: surface pelagic, coastal.

Depth: 0-50 m.

Indo-Pacific; vagrants in the Revillagigedos and southern Baja.


Attributes
Abundance: Common.
Cites: Not listed.
Climate Zone: Northern Tropical (Mexican Province to Nicaragua + Revillagigedos).
Depth Range Max: 50 m.
Depth Range Min: 0 m.
Diet: zooplankton; octopus/squid/cuttlefish; bony fishes; Pelagic crustacea.
Eastern Pacific Range: Northern limit=25; Southern limit=19; Western limit=-115; Eastern limit=-111; Latitudinal range=6; Longitudinal range=4.
Egg Type: Pelagic; Pelagic larva.
Feeding Group: Carnivore.
FishBase Habitat: Pelagic.
Global Endemism: All Pacific (West + Central + East); Indo-Pacific only (Indian + Pacific Oceans); TEP non-endemic; "Transpacific" (East + Central &/or West Pacific); All species.
Habitat: Water column.
Inshore Offshore: Offshore; Offshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 110 cm.
Regional Endemism: Island (s) only; Island (s); Tropical Eastern Pacific (TEP) non-endemic; Eastern Pacific non-endemic; All species.
Residency: Vagrant.
Salinity: Marine; Marine Only.
Water Column Position: Mid Water; Near Surface; Surface; Water column only;


Names
Scientific source:

Links to other sites

References
  • Cantor,., 1849., Catalogue of Malayan fishes., J. Asiatic Soc. Bengal, 18:981-1443.
  • Collette , B. B. and Nauen, C. E., 1983., Scombrids of the world. An annotated and illustrated catalogue of tunas, mackerels, bonitos and related species known to date. FAO species catalogue Vol. 2., FAO Fish. Synop. No 125, 125.
  • Collette, B.B., Reeb, C. and Block, B.A., 2001., Systematics of the tunas and mackerels (Scombridae)., Fish Physiology, 19:1-33.
  • Eschmeyer , W. N. , Herald , E. S. and Hamman, H., 1983., A field guide to Pacific coast fishes of North America from the Gulf of Alaska to Baja California. Peterson Field Guide Ser. 28., Houghton Mifflin:336pp.
  • Fischer , W. , Krup , F. , Schneider , W. , Sommer , C. , Carpenter , K. E. and Niem, V. H., 1995., Guia FAO para la Identificacion de Especies de para los fines de la Pesca. Pacifico Centro-Oriental. Volumen III. Vertebrados - Parte 2., FAO3:1201-1813.
  • Galván-Magaña, F., Gutiérrez-Sánchez, F., Abitia-Cárdenas, L.A., Rodríguez-Romero, J., 2000., The distribution and affinities of the shore fishes of the Baja California Sur lagoons. In Aquatic Ecosystems of Mexico: Status and Scope. Eds. M. Manuwar, S.G. Lawrence, I.F. Manuwar & D.F. Malley. Ecovision World Monograph Series., Backhuys Publishers:383-398.
  • Joseph , J. , Klawe , W. and Murphy, P., 1988., Tuna and Billfish - fish without a country., Inter-American Tropical Tuna Commission:69.
  • Love, M.S., Mecklenburg, C.W., Mecklenburg, T.A., Thorsteinson, L.K., 2005., es of the West Coast and Alaska: a checklist of North Pacific and Artic Ocena species from Baja California to the Alaska-Yukon border., U.S. Department of the Interior, U.S. Geological Survey, Biological Resources Division, 288pp.
  • Schaefer, K. M., 2001., Reproductive biology of tunas., Fish Physiology, 19:225-270.

Acknowledgements

I thank Ashley MacDonald and John Pickering, University of Georgia, for technical support in building this page.


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Following modified from Australian Faunal Directory
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Following modified from FishBase
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https://fishbase.net.br/Summary/speciesSummary.php?genusname=Euthynnus&speciesname=affinis ---> https://fishbase.net.br/summary/Euthynnus-affinis.html
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