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Scomber australasicus

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA ACTINOPTERYGII PERCIFORMES SCOMBRIDAE

Scientific Name: Scomber australasicus
Species Authority: Cuvier, 1832
Common Name(s):
English Blue Mackerel, Spotted Chub Mackerel, Pacific Mackerel, Slimy Mackerel, Southern Mackerel, Japanese Mackerel, Spotted Mackerel
French Maquereau Tacheté
Spanish Caballa Pintoja, Macarela Azul, Macarela Pintoja
Synonym(s):
Scomber antarcticus Castelnau, 1872
Scomber tapeinocephalus Bleeker, 1854
Taxonomic Notes: Populations in the Red Sea and the northern Indian Ocean formerly considered to be Scomber japonicus have been re-identified as Scomber australasicus (Baker and Collette 1998). Microsatellite and mitochondrial cyt b confirm that Scomber australasicus and S. japonicus are separate species (Tseng et al. 2009).

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2011
Date Assessed: 2009-12-05
Assessor(s): Collette, B., Acero, A., Canales Ramirez, C., Cardenas, G., Carpenter, K.E., Chang, S.-K., Chiang, W., Di Natale, A., Fox, W., Guzman-Mora, A., Juan Jorda, M., Miyabe, N., Montano Cruz, R., Nelson, R., Salas, E., Schaefer, K., Serra, R., Sun, C., Uozumi, Y., Wang, S., Wu, J., Yanez, E. & Yeh, S.
Reviewer(s): Russell, B. & Polidoro, B.
Justification:
This species is found primarily in the northwest and southwest Pacific Ocean. In the northwest Pacific, estimated spawning stock biomass for at least one stock is increasing, while for the other stock it is fluctuating, but relatively stable. It is listed as Least Concern. However, more information on the status of this species population in other parts of its range is recommended.
For further information about this species, see TUNAS_SkiJumpEffect.pdf.
A PDF viewer such as Adobe Reader is required.

Geographic Range [top]

Range Description: This species is present in the western Pacific from China and Japan to Australia and New Zealand, extending east to the Hawaiian Islands. In the Eastern Pacific it is a resident only in the Revillagigedo Islands. It also occurs in the Red Sea. It is relatively rare in tropical waters.
Countries:
Native:
Australia; China; Indonesia; Japan; Korea, Democratic People's Republic of; Korea, Republic of; Mexico; New Zealand; Oman; Papua New Guinea; Philippines; Somalia; Taiwan, Province of China
FAO Marine Fishing Areas:
Native:
Indian Ocean – eastern; Indian Ocean – western; Pacific – eastern central; Pacific – northwest; Pacific – southwest; Pacific – western central
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: There are important fisheries for this species in Japan, Australia, and New Zealand but no catch data has been identified for this species in these countries (Collette and Nauen 1983). Some reported landings for this species may be mixed with S. japonicus. However, the majority of the reported worldwide catch is from New Zealand (FAO 2009).

In Japan and the Tsushima Current spawning stock biomass for the Pacific Stock has been estimated to be steadily since 1995 from 50,000 to 150,000 tonnes with a peak of 300,000 tonnes in 2006 (Watanabe pers comm 2009). Estimated spawning stock biomass for the East China Sea fluctuates between 40,000 to 80,000 tonnes from 1992 to 2007 (Watanabe pers comm 2009).
Population Trend: Stable

Habitat and Ecology [top]

Habitat and Ecology: This pelagic and oceanodromous species occurs in coastal waters (Collette 1995) and also in oceanic waters (May and Maxwell 1986) to depths of 300 m. This species schools by size, and schools may include Jack Mackerels and Pacific sardines. They are plankton feeders, filtering copepods and other crustaceans, but adults also feed on small fishes and squids.

This species has an age of first maturity of two years (Stevens et al. 1984), and longevity is eight years in Australia (Stevens et al. 1984). However, this species is larger and longer lived in New Zealand, where longevity has been estimated to be as high as 24 years (Morrison et al. 2001) and length of first maturity is 28 cm (approximately three years) (Manning et al. 2007). In Japan, this species has an age of first maturity of one year and the longevity is approximately six years (Uozumi pers comm. 2009).

Generation length in Japan, is therefore estimated to be 2–3 years, however it may be higher in Australia and New Zealand.

Maximum Size is 40 cm fork length (FL). The all-tackle angling record is of a 1.36 kg fish caught off Kochi, Japan in 2000 (IGFA 2011).
Systems: Marine

Use and Trade [top]

Use and Trade: This species is important in many commercial fisheries within its range.

Threats [top]

Major Threat(s): This species is caught with encircling nets (Collette 1995) in some parts of its range. In Japan, this species has a lower price than S. japonicus which is considered to have a better taste (Uozumi pers comm 2009).

Conservation Actions [top]

Conservation Actions: In Taiwan, this species and Scomber japonicus can only be caught by eight sets of purse-seine vessels. In New Zealand and Australia, there are recreational bag limits and catch limits for all mackerel species. More information on the status of the stock in other parts of this species range is recommended.

Citation: Collette, B., Acero, A., Canales Ramirez, C., Cardenas, G., Carpenter, K.E., Chang, S.-K., Chiang, W., Di Natale, A., Fox, W., Guzman-Mora, A., Juan Jorda, M., Miyabe, N., Montano Cruz, R., Nelson, R., Salas, E., Schaefer, K., Serra, R., Sun, C., Uozumi, Y., Wang, S., Wu, J., Yanez, E. & Yeh, S. 2011. Scomber australasicus. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 20 August 2014.
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