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Coregonus maraena (Bloch, 1779)

Maraena whitefish
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Coregonus maraena   AquaMaps   Data sources: GBIF OBIS
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Image of Coregonus maraena (Maraena whitefish)
Coregonus maraena
Picture by Freyhof, J.

Sweden country information

Common names: Älvsik
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: live export: yes;
Comments: Known from Lake Vättern, Vänern, Mälaren, Siljan (Ref. 88171). Also Ref. 30402.
National Checklist: Sweden checklist - Fish
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/sw.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Kottelat, M., 1997
National Database: Swedish Museum of Natural History

Common names from other countries

сея, 衰白鮭, Älvsik, ... more

分類 / Names 共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa

> Salmoniformes (Salmons) > Salmonidae (Salmonids) > Coregoninae
Etymology: Coregonus: Greek, kore = pupils of the eye + Greek, gonia = angle (Ref. 45335).
  More on author: Bloch.

Environment: milieu / climate zone / depth range / distribution range 生態学

海; 新鮮な水; 汽水性の 底生の; 昇流魚 (Ref. 88171); 深さの範囲 10 - 20 m (Ref. 130226).   Temperate; 69°N - 49°N, 7°E - 37°E (Ref. 59043)

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Europe: In the Baltic Sea: Swedish coast (including Bothnian Gulf, not in Gotland); in southern Baltic, extending from the Schlei to Gulf of Finland. Southeast North Sea Basin: Ems, Weser and Elbe drainages and small rivers of Schleswig-Holstein and Denmark. Landlocked in several lakes in Poland, Sweden, and Russia. Introduced and transplanted in many drainages within its native range and outside westward to Rhine drainage (Ref. 59043). Apparent abundance in Germany, Poland and Scandinavia results from the massive stocking programs without which the populations would rapidly decline. Usually known as C. lavaretus in the Baltic Sea basin. North Sea population might represent a distinct species (Ref. 59043).

サイズ / 重さ / 年齢

Maturity: Lm ?  range ? - ? cm
Max length : 130 cm TL オス/雌雄の選別がない; (Ref. 593); 最大公表体重: 10.0 kg (Ref. 593)

生物学     用語集 (例 epibenthic)

Forages along coasts. Also reported from deep, oligo-mesotrophic lakes. Feeds on benthic prey (crustaceans, molluscs, large insect larvae, small fish). Spawns in shallow water, in rapids or small rivers or over firm sediments in lowland rivers and estuaries. Northernmost stocks undertake the longest migrations between spawning and foraging grounds. In the northern part of the range, individuals may travel as much as 700 km between these areas (Ref. 59043). Growth parameters from Russia suggest a maximum age of 20 years (Ref. 56506) . Members of the genus Coregonus readily hybridise with other Coregonus species and populations (Ref. 89548).

Life cycle and mating behavior Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 幼生

Adults ascend rivers between June and October (northern Baltic) or November (southern Baltic), when water temperature drops below 10 °C. Spawning occurs in estuarine areas with low salinities or lower reaches of rivers or rapids (Ref. 59043). Coregonus species spawn on gravel and sand bottoms (Ref. 35387). Spawns for the first time at 3-5 years. Some females spawn only every second year (Ref. 59043). Spawners may spend the winter in rivers or near estuaries along the coast (Ref. 89484). Eggs hatch in early spring and larvae drift downstream to estuarine bays or to the sea; juveniles migrate to the sea in summer (Ref. 59043).

主な参考文献 Upload your references | 参考文献 | コーディネーター | 協力者

Kottelat, M., 1997. European freshwater fishes. An heuristic checklist of the freshwater fishes of Europe (exclusive of former USSR), with an introduction for non-systematists and comments on nomenclature and conservation. Biologia, Bratislava, 52/Suppl. 5:1-271. (Ref. 13696)

IUCNのレッドリストの状況は (Ref. 130435)

  攻撃されやすい (VU) (A2cd); Date assessed: 05 March 2010

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

  Harmless




Human uses

水産業: 少数商業の; 水産養殖: 商業
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Estimates based on models

Preferred temperature (Ref. 115969): 4.5 - 9.7, mean 7.5 (based on 174 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00537 (0.00328 - 0.00878), b=3.20 (3.06 - 3.34), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
栄養段階 (Ref. 69278):  3.5   ±0.3 se; based on size and trophs of closest relatives
回復力 (Ref. 120179):  手段, １．４年～４．４年の倍増期間の最小個体群 (tm=2-3).
Fishing Vulnerability (Ref. 59153):  Very high vulnerability (78 of 100).
価格帯 (Ref. 80766):   Very high.