分類 / Names
共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa
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; pH range: 7.0 - 7.5; dH range: 10 - 20; potamodromous. Temperate; 2°C - 18°C (Ref. 1672); 67°N - 36°N, 10°W - 142°E
Europe: Atlantic Ocean, North and Baltic Sea basins, from Loire drainage eastward, eastern Great Britain, Rhône and Volga drainages, upper Danube and middle and upper Dniestr and Dniepr drainages; in Finland, north to about 61°N. Introduced to eastern and northern Italy, Ireland, Wales and Scotland. Eastern and southern limits unclear (Ref. 59043). Occurs as far east as Korea (Ref. 4537). Populations from the Iberian Peninsula and Adour basin in southern France refer to G. lozanoi (Ref. 57030). Populations from the Caspian basin may represent a distinct species (Ref. 59043).
Length at first maturity / サイズ / 重さ / 年齢
Maturity: Lm 9.3 range ? - ? cm
Max length : 21.0 cm TL オス/雌雄の選別がない; (Ref. 88166); common length : 12.0 cm TL オス/雌雄の選別がない; (Ref. 6258); 最大公表体重: 220.00 g (Ref. 6258); 最大記録サイズ: 8 年 (Ref. 6258)
背面の脊椎 (合計): 2 - 3; 背鰭 (合計): 5-7; 肛門の骨 2-3; 臀鰭: 6 - 8; 脊つい: 39 - 41. Diagnosed from other congeners in Europe by the possession of the following characters: barbel reaching beyond anterior eye margin, usually to middle of eye; snout length greater than postorbital distance; head length 26-30% SL; eye diameter 5-7% SL; 1.0-1.4 times in interorbital distance in over about 6 cm SL specimens (less in smaller ones), 2.4-2.8 times in head depth; head depth 15-17% SL at nape, 43-51% HL at eye; body depth 19-23% SL; head width 14-16% SL, 49-57% HL; caudal peduncle depth 30-34% HL; breast naked between pectorals; scales between anus and anal origin 4-5; scales on lateral line usually 39-42 + 2; and scales around caudal peduncle usually 12-14 (Ref. 59043). Caudal fin with 19 rays (Ref. 2196). Scalar formula: 38-45 (Ref. 40476).
Occurs in nearly all types of riverine and lacustrine habitats with sand bottom. Found in small mountain streams, large lowland rivers and large lakes (Ref. 59043). Inhabits fast flowing rivers with sand or gravel bottom but may also occur in still waters. Forms schools. Feeds on insect larvae, mollusks, and crustaceans. Normally active during the day but if they are disturbed, in particular, by predators, they can defer their activity to periods when light intensity is weak. Capable of emitting squeaking sounds. These vocalizations, which is a means by which fish communicate with each other, vary with the degree of activity and the temperature and are independent of the season of reproduction (Ref. 30578). Breeds in shallow water over stones, sand or plant material. Eggs are released above substrate and drift with current, sinking to bottom and sticking to substrate. Larvae and juveniles occur on the bottom and prefer detritus-rich sandy habitats and low current (Ref. 59043).
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Spawns once a year for several years in low productivity streams, but exhibits multiple spawning within a season in high productivity environments (Ref. 40290, 40756). Releases eggs above substrate which drift with current, sink to the bottom and stick to substrate. Larvae and juveniles occur on the bottom and prefer detritus-rich sandy habitats and low current (Ref. 59043).
Kottelat, M. and J. Freyhof, 2007. Handbook of European freshwater fishes. Publications Kottelat, Cornol and Freyhof, Berlin. 646 pp. (Ref. 59043)
Human uses
水産業: 商業; 水族館・水槽: 商業; 餌: usually
用具
特記事項
XMLをダウンロードして下さい
インターネットの情報源
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00708 (0.00611 - 0.00820), b=3.12 (3.08 - 3.16), in cm total length, based on LWR estimates for this species (Ref.
93245).
栄養段階 (Ref.
69278): 3.1 ±0.38 se; based on food items.
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=1-3; tmax=8; Fec=1,000-3,000).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (31 of 100).
