Biology:Sebastes aurora
| Sebastes aurora | |
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Scorpaeniformes |
| Family: | Scorpaenidae |
| Genus: | Sebastes |
| Species: | S. aurora
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| Binomial name | |
| Sebastes aurora (Gilbert, 1890)
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| Synonyms[1] | |
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Sebastes aurora, the aurora rockfish, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. It is found in the northeastern Pacific Ocean.
Taxonomy
Sebastes aurora was first formally described as Sebastichthys aurora in 1890 by the American ichthyologist Charles Henry Gilbert with the type locality given as Santa Barbara Islands in California .[2] Some authorities place this species in the subgenus Eosebastes. The specific name aurora means "dawn" or "sunrise" thought to be an allusion to the uniform red colour of the body, although it is paler on the lower body.[3]
Description
Sebastes aurora has a deep rhombus-shaped body which is 36% to 40% as deep as its standard length and is covered in scales.[4] There are 13 spines and 12-14 soft rays in the dorsal fin. The anal fin contains 3 spines, the second spine being rather long, and 5-6 soft rays. There are robust spines on the head, these are nasal, preocular, supraocular, postocular, tympanic, parietal and nuchal spines but typically there are no coronal spines. There are small lobes protruding from the front part of the upper jaw.[1] The caudal fin is truncate or concave.[4] On capture the overall colour is rose-red to pale pink, but while they are underwaterthe overall colour is white broken by pale pink to red saddles and blotches on the back with silvery flanks and belly.[5] The aurora rockfish reaches a maximum total length of 41 cm (16 in).[1]
Distribution and habitat
Sebastes aurora is found in the northeastern Pacific Ocean along the western coast of North America from Amphitrite Point on Vancouver Island in British Columbia to Cedros Island in Baja California.[1] This species is a demersal fish occurring over both soft and hard substrates at depths from 82 to 762 m (269 to 2,500 ft).[4] In 2009 a specimen was collected in Alaskan waters in the Gulf of Alaska, a northward range extension of 225 km (140 mi).[6]
Biology
Sebastes aurora prey on fish, krill, octopus and a diversity of other small marine organisms.[4] This is a long-lived species which has been estimated to have a lifespan of up to 125 years. The estimated length and age at which 50% of the fish are sexually mature is 25.5 cm (10.0 in) and 12.56 years. The peak time for parturition is in May.[7] It is a viviparous species and the larvae are planktonic while the juveniles are pelagic.[1]
Fisheries
Sebastes aurora is a minor component of commercial fisheries in southern California where most are taken using gill nets with a small amount caught annually by recreational anglers. The flesh is considered to be highly palatable.[4]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Froese, Rainer and Pauly, Daniel, eds. (2021). "Sebastes aurora" in FishBase. June 2021 version.
- ↑ Eschmeyer, William N.; Fricke, Ron; van der Laan, Richard, eds. "Species in the genus Sebastes". California Academy of Sciences. http://researcharchive.calacademy.org/research/ichthyology/catalog/fishcatget.asp?tbl=species&genus=Sebastes.
- ↑ Christopher Scharpf; Kenneth J. Lazara, eds (22 May 2021). "Order Perciformes (Part 8): Suborder Scorpaenoidei: Families Sebastidae, Setarchidae and Neosebastidae". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf and Kenneth J. Lazara. https://etyfish.org/perciformes8/.
- ↑ 4.0 4.1 4.2 4.3 4.4 "Aurora Rockfish". Mexican Fish. https://mexican-fish.com/aurora-rockfish/.
- ↑ "Aurora Rockfish (Sebastes aurora)". Washington Department of Fish and Wildlife. https://wdfw.wa.gov/species-habitats/species/sebastes-aurora#desc-range.
- ↑ Edward A. Laman; James W. Orr (2011). "First record of an aurora rockfish Sebastes aurora from Alaskan waters". Northwestern Naturalist 92 (3): 230-232. https://www.jstor.org/stable/41300905.
- ↑ Head, Melissa; Cope, Jason; Wulfing, Sophie (2020). "Applying a flexible spline model to estimate functional maturity and spatio-temporal variability in aurora rockfish (Sebastes aurora)". Environmental Biology of Fishes 103. doi:10.1007/s10641-020-01014-2.
External links
Wikidata ☰ Q2082803 entry
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