| Common names: mackerel (English), carite (Espanol), sierra (Espanol) |
Scomberomorus concolor (Lockington, 1879)
Monterey spanish mackerel, Gulf sierra
Elongate, strongly compressed; snout shorter than rest of head; no fatty eyelid; rear of top jawbone exposed; teeth strong, compressed, triangular or knife-like; 21-27 gill rakers; 1st dorsal fin with XV-XVIII spines; 2 dorsals very close together; 6-9 finlets after 2nd dorsal and 6-8 after anal fin; 2 small keels separated by third larger keel on tail base; corselet of scales obscure.
Male: back metallic blue; flank and belly silver; without bars, stripes or spots. Female: darker, with 2 series of alternating gold spots on flank.
Size: 87 cm.
Habitat: coastal surface pelagic.
Depth: upper 15 m.
With two well separated populations, one of California as far south as the US/Mexican border and the other in the upper two thirds of the Gulf of California. Due to overfishing the California population is extinct and the Gulf of California population is restricted to a small area in the upper Gulf.
Global Endemism: All species, East Pacific endemic, TEP non-endemic
Regional Endemism: All species, Tropical Eastern Pacific (TEP) non-endemic, Temperate Eastern Pacific, primarily, California province, primarily, Continent, Continent only
Climate Zone: North Temperate (Californian Province &/or Northern Gulf of California), Northern Subtropical (Cortez Province + Sinaloan Gap)
Inshore/Offshore: Inshore, Inshore Only
Water Column Position: Surface, Near Surface, Mid Water, Water column only
Habitat: Water column
FishBase Habitat: Pelagic
Habitat and Ecology
This species has a sex ratio of 1:1. Based on otolith ageing, the maximum age is eight years (Valdovino Jacobo et al. 2006). Based on the length-weight curve published by Valdovino Jacobo et al. (2006), the length at 50% maturity is 36.5 cm fork length (FL) at three years. The generation length is therefore estimated to be 3.8 years.
Depth range (m): 2 - 37
Depth range (m): 2 - 37
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
Diet: octopus/squid/cuttlefish, Pelagic crustacea, bony fishes
Life History and Behavior
CITES: Not listed
IUCN Red List Assessment
Red List Category
Red List Criteria
- 1996Endangered(Baillie and Groombridge 1996)
In the Gulf of California, this species is caught with Scomberomorus sierra, mainly using gillnets in areas close to the coast. Catches are reported as a combined group ("sierras") and therefore, it is not possible to determine a population trend for this species. However, catch data from Instituto Nacional de la Pesca, Mexico (2002) was used to forecast the probability of decline in this species population in the northern Gulf of Mexico based on projected effort. If effort were to continue the same as in 2002, the stock was predicted to decline 40% over the next 10 years. There is no indication that there have been declines in the effort in this fishery since 2002 (R. Nelson pers comm. 2011).
The species spawns primarily in the northern Gulf of California, were there has been significant habitat loss due to cessation of flow from the Colorado River. It is important to note that two other highly threatened species occur in the area, the Totoaba (Toatoaba macdonaldi, family Sciaenidae) and the Vaquita (Phocoena sinus), a porpoise (Jamarillo-Legorreta and Taylor 2010, Jefferson 2010).
Relevance to Humans and Ecosystems
Monterrey Spanish mackerel
References[edit source | edit]
- Safina, C. 1996. Scomberomorus concolor. 2006 IUCN Red List of Threatened Species. Downloaded on 5 August 2007.
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