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Silurus glanis  Linnaeus, 1758

Wels catfish
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Native range
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Silurus glanis   AquaMaps   Data sources: GBIF OBIS
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Image of Silurus glanis (Wels catfish)
Silurus glanis
Picture by Hartl, A.

分類 / Names 共通名の | 類義語 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

条鰭類 > Siluriformes (Catfish) > Siluridae (Sheatfishes)
Etymology: Silurus: Greek, silouros = a cat fish + Greek, odous = teeth (Ref. 45335).   More on author: Linnaeus.

環境 / 気候 / 範囲 生態学

; 新鮮な水; 汽水性の 底生の漂泳性; 移住性ではない; 深さの範囲 0 - 30 m (Ref. 9988).   Temperate; 4°C - 20°C (Ref. 2059), preferred ?; 62°N - 36°N, 0°E - 80°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

Europe and Asia. North, Baltic, Black, Caspian and Aral Sea basins, as far north as southern Sweden and Finland; Aegean Sea basin in Maritza and from Struma to Sperchios drainages; Turkey. Absent from the rest of Mediterranean basin. Now widely introduced and translocated throught Europe and Lake Balkhash basin in Kazakhstan. Several countries report adverse ecological impact after introduction. In Appendix III of the Bern Convention (protected fauna).

Length at first maturity / サイズ / 重さ / 年齢

Maturity: Lm 87.5, range 86 - 108 cm
Max length : 500 cm SL オス/雌雄の選別がない; (Ref. 59043); common length : 300 cm TL オス/雌雄の選別がない; (Ref. 9988); 最大公表体重: 306.0 kg (Ref. 9988); 最大記録サイズ: 80 年 (Ref. 59043)

簡単な記述 形態学 | 形態計測学

背面の脊椎 (合計): 1; 背鰭 (合計): 4-5; 肛門の骨 1; 臀鰭: 83 - 95. Distinguished from all other freshwater fishes in Europe by the following unique characters: two pairs of mental barbels; and anal fin with 83-91½ rays. Differs further from the following combination of features: body naked; large, depressed head; dorsal fin with 2-4½ rays; caudal fin rounded or truncate; no adipose fin; and anal rays almost touching caudal (Ref. 59043). Caudal fin with 17 rays (Ref. 2196).

生物学     用語集 (例 epibenthic)

Inhabits large and medium size lowland rivers, backwaters and well vegetated lakes (Ref. 59043). Occurs mainly in large lakes and rivers, though occasionally enters brackish water in the Baltic and Black Seas (Ref. 9988). Found in deep waters of dams constructed on the lower reaches of rivers (Ref. 9696). A nocturnal predator, foraging near bottom and in water column. Larvae and juveniles are benthic, feeding on a wide variety of invertebrates and fish. Adults prey on fish and other aquatic vertebrates. Attains first sexual maturity at 2-3 years of age (Ref. 59043). Spawns in the salt water of the Aral Sea (at Kulandy) (Ref. 1441). Marketed fresh, canned and frozen; can be pan-fried and baked (Ref. 9988). Locally threatened due to river regulation destroying shallow spawning sites (Ref. 59043).

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

Males defend small territories in the spawning sites and construct nests made of plant materials. They dig shallow depressions or clean spawning substrate such as willow (Salix) and roots. Males guard the nests until larvae emerge. Spawns in pairs. Eggs hatch in 2-3 days. Larvae live in the nest until yolk sac is absorbed for 2-4 (Ref. 59043). Eggs are surrounded by a mucous and adherent wrapping. Incubation lasts about 50 hours at 24°C. Egg size 3 mm, larval length at hatching 8.5 mm (Ref. 26211).

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. 109396)

CITES (Ref. 94142)

Not Evaluated

人間に対する脅威

  Potential pest




Human uses

水産業: 商業; 水産養殖: 商業; 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

より多くの情報

Age/Size
成長
体長-重さ
Length-length
体長組成
形態計測学
形態学
幼生
幼生の動力
補充
豊度
参考文献
水産養殖
水産養殖の紹介
緊張
遺伝子の
対立遺伝子頻度
遺伝
病気
行列
Mass conversion
協力者
画像
Stamps, Coins

シガテラ(食中毒の名前)
速度
泳ぐ 型式
カマ
Otoliths

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インターネットの情報源

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5001   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00661 (0.00421 - 0.01038), b=3.00 (2.86 - 3.14), based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
栄養段階 (Ref. 69278):  4.4   ±0.2 se; Based on diet studies.
回復力 (Ref. 69278):  低い, 4.5年~14年の倍増期間の最小個体群 (tm=3-4; tmax=30).
Prior r = 0.29, 2 SD range = 0.1 - 0.87, log(r) = -1.24, SD log(r) = 0.55, Based on: 2 K, 10 tgen, 2 tmax, 5 Fec records
弱み (Ref. 59153):  Very high vulnerability (84 of 100) .
価格帯 (Ref. 80766):   Unknown.