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Slovenia country information
Common names:
Som
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Population has declined due to pollution and river regulation. Conservation measures include habitat protection, spawning grounds, and artificial propagation (Ref. 90061). Status of threat: vulnerable (Ref. 90061).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/si.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Povz, M., 1996
National Database:
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Population has declined due to pollution and river regulation. Conservation measures include habitat protection, spawning grounds, and artificial propagation (Ref. 90061). Status of threat: vulnerable (Ref. 90061).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/si.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Povz, M., 1996
National Database:
Common names from other countries
分類 / Names 共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa
> Siluriformes (Catfishes) > Siluridae (Sheatfishes)
Etymology: Silurus: Greek, silouros = a cat fish + Greek, odous = teeth (Ref. 45335).
More on author: Linnaeus.
Etymology: Silurus: Greek, silouros = a cat fish + Greek, odous = teeth (Ref. 45335).
More on author: Linnaeus.
Environment: milieu / climate zone / depth range / distribution range 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); 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.
Length at first maturity / サイズ / 重さ / 年齢
Maturity: Lm 87.5, range 86 - 108 cm
Max length : 273 cm TL オス/雌雄の選別がない; (Ref. 123627); 最大公表体重: 130.0 kg (Ref. 123627); 最大記録サイズ: 80 年 (Ref. 59043)
Max length : 273 cm TL オス/雌雄の選別がない; (Ref. 123627); 最大公表体重: 130.0 kg (Ref. 123627); 最大記録サイズ: 80 年 (Ref. 59043)
簡単な記述 検索表 | 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).
The maximum length of the species has been recorded as 5 m for a long time and the maximum weight as 306 kg . It has been demonstatred that misidentifications and problems of measurment units have led to these numbers. The recorded maxima with evidence are 2.73 m and 130 kg (Ref. 123627). 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 | 卵 | 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)
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(Aquaculture systems: 代謝; 水産業: 代謝; publication : search) | FishSource | 私達の周りの海
より多くの情報
Population dynamics
成長のパラメーター
Max. ages / sizes
Length-weight rel.
Length-length rel.
体長組成
Mass conversion
補充
豊度
成長のパラメーター
Max. ages / sizes
Length-weight rel.
Length-length rel.
体長組成
Mass conversion
補充
豊度
Anatomy
カマ
Brain
Otolith
カマ
Brain
Otolith
Physiology
Body composition
Nutrients
酸素消費
水泳形態
泳ぐ速さ
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)
Body composition
Nutrients
酸素消費
水泳形態
泳ぐ速さ
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)
用具
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特記事項
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インターネットの情報源
Alien/Invasive Species database | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes(部類, 種) | DiscoverLife | DORIS | ECOTOX | Faunafri | Fishtrace | GenBank(ゲノム, ヌクレオチド) | GloBI | GOBASE | | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | 国のデーターベース | Otolith Atlas of Taiwan Fishes | 公共の水族館 | PubMed | Reef Life Survey | Scirus | SeaLifeBase | 生命の木 | Wikipedia(行く, 検索する) | World Records Freshwater Fishing | Zoobank | 動物に関する記録
Estimates based on models
Phylogenetic diversity index (Ref. 82804): PD50 = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00631 (0.00525 - 0.00759), b=2.99 (2.94 - 3.04), in cm Total Length, based on LWR estimates for this species (Ref. 93245).
栄養段階 (Ref. 69278): 4.4 ±0.2 se; based on diet studies.
回復力 (Ref. 120179): 低い, ４．５年～１４年の倍増期間の最小個体群 (tm=3-4; tmax=30).
Fishing Vulnerability (Ref. 59153): Very high vulnerability (84 of 100).