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Squalius cephalus  (Linnaeus, 1758)

Chub
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Squalius cephalus   AquaMaps   Data sources: GBIF OBIS
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Squalius cephalus
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分類 / Names 共通名の | 類義語 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

条鰭類 > Cypriniformes (Carps) > Cyprinidae (Minnows or carps) > Leuciscinae

Issue
Leuciscus orientalis Nordmann, 1840 is considered valid in Eschmeyer (CofF ver. May 2011: Ref. 86870). This is allocated to Squalius in Ref. 84537, a valid name, but secondary homonym Squalius orientalis Heckel, 1847 needs a replacement name.

環境 / 気候 / 範囲 生態学

; 新鮮な水; 汽水性の 底生の漂泳性; pH range: 6.0 - 7.8; dH range: 8 - 25; potamodromous (Ref. 51243); 深さの範囲 0 - ? m.   Temperate; 4°C - 20°C (Ref. 2059), preferred ?; 64°N - 35°N, 10°W - 60°E

分布 国々 | 国連食糧農業機関の区域 | エコシステム | 事件 | Point map | 導入 | Faunafri

Eurasia: North, Baltic, northern Black, White, Barents and Caspian Sea basins, Atlatinc basins southward to Adour drainages (France), Great Britain north to 56°C, Scandinavia: southern Finland, Sweden north to abut Stockholm. Mediterranean basin from Var to Hérault (possibly Aude) (France) drainages. Introduced elsewhere, Naturally absent from Italy and Adriatic basin.

Length at first maturity / サイズ / 重さ / 年齢

Maturity: Lm ?, range 7 - 30 cm
Max length : 60.0 cm SL オス/雌雄の選別がない; (Ref. 59043); common length : 30.0 cm TL オス/雌雄の選別がない; (Ref. 556); 最大公表体重: 8.0 kg (Ref. 2196); 最大記録サイズ: 22 年 (Ref. 41616)

簡単な記述 形態学 | 形態計測学

背面の脊椎 (合計): 3; 背鰭 (合計): 7-9; 肛門の骨 3; 臀鰭: 7 - 10; 脊つい: 42 - 48. Differs from its congeners in France, North, Baltic, Arctic, Black and Caspian Sea basins by the possession of the following characters: dorsal profile with a well-marked discontinuity between head and trunk; a row of black pigments along free margin of each flank scale, forming a regular reticulate pattern, with no or very few pigments on central part of scales; anal and pelvic fins orange to red; dorsal fin with 8½ branched rays; anal fin with 8½ branched rays (rarely 9½); scales on lateral line 40-45 + 2-3; mouth terminal, with well marked chin; lower jaw tip not included in the upper lip; interorbital distance 37-42% HL; postorbital distance 47-51% HL; eye diameter 17-22% HL, 1.5-2.3 times in snout length; body depth 22-27% SL; lower jaw long, length greater than depth of operculum; iris whitish; pharyngeal teeth 2,5-5,2; in stretched anal fin of individuals larger than about 15 cm SL, distance between tips of first and last branched rays usually greater than caudal peduncle depth (Ref. 59043). Caudal fin with 19 rays (Ref. 2196).

生物学     用語集 (例 epibenthic)

Most abundant in small rivers and large streams of barbel zone with riffles and pools. Found along shores of slow-flowing lowland rivers, even in very small mountain streams, and in large lake, undertaking spawning migration to inflowing streams. Adults are solitary while juveniles occur in groups. Feeding larvae and juveniles live in very shallow shoreline habitats. Feed on a wide variety of aquatic and terrestrial animals and plant material. Large individuals prey predominantly on fishes. Breed in fast-flowing water above gravel bottom, rarely among submerged vegetation. Often form fertile hybrids with Alburnus alburnus (Ref. 59043). Popular with amateur sport fishermen. Can be caught with various baits and lures. The flesh is of poor quality (Ref. 38587).

Life cycle and mating behavior 成熟 | 繁殖 | 放精 | | 生産力 | 幼生

Spawning occurs in fast-flowing water above gravel bottom, rarely among submerged vegetation. Female spawn more than once during a season, individual females spawn with several males. Males assemble at spawning site and follow ripe females, often with much splashing, to shallow riffles. Females lays sticky eggs into the gravel (Ref. 59043). Pale yellow eggs are found attached to gravel, weed and stones in flowing water (Ref. 41678).

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. and J. Freyhof, 2007. Handbook of European freshwater fishes. Publications Kottelat, Cornol and Freyhof, Berlin. 646 pp. (Ref. 59043)

IUCNのレッドリストの状況は (Ref. 115185)

CITES (Ref. 94142)

Not Evaluated

人間に対する脅威

  Harmless




Human uses

水産業: 少数商業の; ゲームフィッシュ: はい
FAO(水産養殖: 代謝; 水産業: 代謝; publication : search) | FisheriesWiki | 私達の周りの海

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