Eastern sea bass [1] or eastern bass [2] ( lat. Sebastes taczanowskii ) is a sea fish of the scorpion family (Scorpaenidae).
| Eastern rockfish |
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| Scientific classification |
|---|
| {{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{| 1}} | 1}} | 1}} | 1}} | 1}} | 1}} | 1}} | 1}} | 1}} | 1}} | 1}} | 1}} | 1}} | 1}} | 1 }} | 1}} | 1}} | 1}} | 1}} | 1}} | 4}} : | Eukaryotes |
| No rank : | Bilateral symmetrical |
| Suborder : | Scorpion-shaped |
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| International scientific name |
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Sebastes taczanowskii Steindachner , 1880 |
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The maximum body length is 32 cm [3] .
The body is moderately elongated, compressed laterally, covered with ctenoid scales . The lower jaw extends forward. On the back of the head there are weak ridges hidden under the scales. Dorsal fin with 13 prickly and 13-15 soft rays. There is a notch between the prickly and soft parts. In the anal fin there are 3 spiny and 6-8 soft rays. Caudal fin truncated with small notch. On the first branchial arch 33-39 stamens. In the lateral line 40–49 scales. The vertebrae are 26–27 [1] .
Body color brown-violet, belly somewhat lighter. There are dark obscure spots on the back. The fins are dark. The posterior margin of the caudal fin is light.
Distributed in the Sea of Japan along the mainland coast from the southeast of the Korean Peninsula to southwest Sakhalin and Soviet harbor . They are found in the Sea of Okhotsk in the bays of Aniva and Terpeniya , as well as in the Pacific waters of Japan and the southern Kuril Islands [1] .
Sea demersal fish live at depths from 2 to 120 m among stone placers and in thickets of sea grass near reefs. Keep in small groups, do not form flocks. Sometimes they enter estuaries and estuaries.
Nutrition
The diet includes crustaceans , polychaetes and fish. As fish grows, the nutrition spectrum changes significantly. Small individuals feed mainly on amphipods and isopods , and larger individuals switch to shrimp and juvenile fish [4] .
Reproduction
Like other representatives of the genus Sebastes, oriental perch belongs to viviparous fish with internal fertilization. For the first time ripen at the age of 4 years. Mating occurs in the fall. Sperm is stored in the ovaries of the female for several months before fertilization of the eggs. Hatching takes place inside the female; larvae moulder in June – July. The larvae will be washed at a time, once a year [5] [6] . The first months of life live in the water column, then move on to a near-bottom lifestyle.
Specialized fishing is not conducted. Often caught in the form of by- catch in the trawl fishery of other bottom fish, as well as in fixed seines. A popular sport fishing facility [1] .
- ↑ 1 2 3 4 Commercial fish of Russia. In two volumes / Ed. O.F. Gritsenko, A.N. Kotlyar and B.N. Kotenev. - M .: VNIRO publishing house, 2006. - V. 1. - S. 500-501. - 656 p. - ISBN 5-85382-229-2 .
- ↑ Sokolovsky A. S., Dudarev V. A., Sokolovskaya T. G., Solomatov S. F. Fishes of the Russian waters of the Sea of Japan: Annotated and illustrated catalog. - Vladivostok: Dalnauka, 2007. - S. 51-56. - 200 p. - ISBN 978-5-8044-0750-7
- ↑ Eastern sea bass in the FishBase database.
- ↑ Kolpakov N.V. On the biology of small Sebastes minor and eastern S. taczanowskii (Sebastidae) sea bass of coastal waters of northern Primorye // Issues of ichthyology. - 2006. - T. 46 , No. 3 . - S. 334—344 .
- ↑ Hiroya Takahashi, Kazunori Takano, Akihiro Takemura. Reproductive cycles of Sebastes taczanowskii , compared with those of other rockfishes of the genus Sebastes // Environmental Biology of Fishes. - 1991. - Vol. 30, No. 1-2 . - P. 23-30. - DOI : 10.1007 / BF02296873 .
- ↑ Takemura, A .; Takano, K .; Takahashi, H. Reproductive cycle of a viviparous fish, the white-edged rockfish, Sebastes taczanowskii . - 1987. - Vol. 38, No. 2 . - P. 111-125.
