Brown sea bass [1] ( lat. Sebastes auriculatus ) is a species of marine ray-finned fish of the scorpion family (Scorpaenidae). It lives in the north-eastern part of the Pacific Ocean . It is found at a depth of up to 135 m. The maximum length is 56 cm.
| Brown sea bass |
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| Scientific classification |
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| No rank : | Bilateral symmetrical |
| Suborder : | Scorpion-shaped |
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| International scientific name |
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Sebastes auriculatus Girard , 1854 |
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Content
The massive massive body is covered with ctenoid scales . On the head are numerous strong spikes. The interorbital space is flat or slightly convex. On the first branchial arch 42β49 branchial stamens . A long dorsal fin with 13 spiny and 12-15 soft rays, in the anal fin 3 spiny and 5-8 soft rays. There are 25-30 soft rays in the pectoral fin. The caudal fin is rounded. In the lateral line 42β49 scales [2] . All spiky rays are poisonous.
The body is painted brown with various shades and covered with numerous rounded spots of dark brown, red-brown and black. In the south of the range, this species was found to have a red body color. There is a distinct dark spot at the posterior edge of the gill cover. In large individuals, this spot becomes faded. Reddish-brown, brown or orange radial stripes extend from the upper jaw and eyes. The fins are dark pink.
The maximum body length is 56 cm [3] .
The larvae and juveniles of brown sea bass lead a pelagic lifestyle for 2.5β3 months. Then they migrate to shallow areas of the coast and switch to a near-bottom lifestyle at a depth of up to 30 m. Adults lead a solitary lifestyle at a depth of up to 150 m (usually no deeper than 120 m), sometimes they form small groups. Do not make extended migrations. Females and males grow at approximately the same rate. Life expectancy up to 34 years [4] . They hunt at night, and during the day they hide in crevices of rocks or among thickets of aquatic vegetation.
Nutrition
Brown sea bass eats small fish and small invertebrates ( crabs , shrimps , etc.)
Reproduction
The males and females of brown sea bass ripen at about the same body length. A small part of the fish matures at the age of three years with a body length of 19 cm. 50% of individuals in the population matures at a body length of 24β31 cm at the age of 4β5 years, and all individuals mature at a body length of 38 cm at the age of 10 years [4] . According to other sources, all individuals of brown sea bass ripen at the age of 6 years [5] . Viviparous fish. Fertilization is internal, in different parts of the range occurs in different seasons. Sperm is stored inside the female for several months until the eggs are fertilized. Hatching occurs inside the female. Fertility varies from 55 thousand to 339 thousand eggs. In some regions, the female can sweep several servings of larvae per season. In Prince Williamβs Bay, the larvae sweeping season is from April to June; off the coast of central and northern California, from December to June, and off southern California, the larvae peak is observed in January and extends until August [4] .
Distributed in the coastal waters of the northeastern Pacific Ocean. The range extends from Southern Baja California to Prince William Strait and further north to Alaska Bay . The most numerous in the central and southern parts of Prince William Strait, as well as from Bahia Tortugas to Bodega Bay ( California ) [6] .
Brown sea bass is of commercial importance, especially in terms of live fish supplies. It is a popular sport fishing destination .
- β Reshetnikov Yu.S. , Kotlyar A.N. , Russ T.S. , Shatunovsky M.I. Fish. Latin, Russian, English, German, French. / edited by Acad. V. E. Sokolova . - M .: Rus. Yaz., 1989 .-- S. 375 .-- 12,500 copies. - ISBN 5-200-00237-0 .
- β Orr, JW, MA Brown, and DC Baker. 2000. Guide to rockfishes (Scorpaenidae) of the genera Sebastes , Sebastolobus , and Adelosebastes of the Northeast Pacific Ocean, second edition. US Dep. Commer., NOAA Tech. Memo. NMFS-AFSC-117, 47 p.
- β Sebastes auriculatus (English) in the FishBase database.
- β 1 2 3 Love, M. Sebastes auriculatus // The rockfishes of the northeast Pacific / MS Love, M. Yoklavich, and L. Thorsteinson. - Berkeley and Los Angeles: Univ. California Press, 2002. - P. 129-131. - 405 p. - ISBN 0-520-23437-5 .
- β Love MS, Johnson K. Aspects of the life histories of grass rockfish, Sebastes rastrelliger , and brown rockfish, S. auriculatus , from southern California // Fish. Bull .. - 1998. - Vol. 87. - P. 100-109.
- β Brown rockfish (neopr.) . Alaska Fisheries Science Center.
