分類 / Names
共通名の | 類義語 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Environment: milieu / climate zone / depth range / distribution range
; 海; 新鮮な水; 汽水性の 底生の; 昇流魚 (Ref. 51243); 深さの範囲 10 - 40 m (Ref. 93286). Temperate; 46°N - 37°N, 10°E - 20°E
Europe: Adriatic Sea and its tributaries between Po (Italy) and Buna (Albania) drainages. Recorded from Corfu; present in lowermost part of Adriatic rivers from Soca to Drin. Records from Tyrrhenian slope of Italy, Spain and France are erroneous.
In Appendix II of the Bern Convention (strictly protected fauna). International trade restricted (CITES II, since 1.4.98; CMS Appendix II). Only a single surviving naturally- spawning population at confluence of Ticino and Po; occasional records from Adriatic Sea and coastal rivers; spawning populations survived in Albania, but have possibly been extirpated. Status of threat: critically endangered.
サイズ / 重さ / 年齢
Maturity: Lm ?  range ? - ? cm
Max length : 200 cm TL オス/雌雄の選別がない; (Ref. 3397); 最大公表体重: 25.0 kg (Ref. 3193)
形態学 | 形態計測学
背面の脊椎 (合計): 0; 背鰭 (合計): 36-48; 臀鰭: 24 - 31. Snout moderate, very broad and rounded at tip. Lower lip continuous, interrupted at center. Barbels nearer to tip of snout than to mouth and not touching it. Five rows of scutes, dorsal 10-14 (the middle ones deeper and usually larger than those at front), lateral 32-42 on each side, ventral 8-11 on each side, with no smaller plates between dorsal and lateral rows. Back is olivaceous brown, flanks lighter, belly white.
Occurs in the sea close to shore and estuaries, not entering pure marine waters. In freshwater, it inhabits large deep rivers (Ref. 59043). A long-lived species which is found mainly over sand and mud. Feeds on bottom-living invertebrates and small fishes. Reproduction takes place from May to July. Is threatened by habitat destruction, pollution and overfishing (Ref. 26100). The flesh is used for food but the eggs are not consumed as caviar (Ref. 6866).
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Enters rivers from March to May, and presumably spawns then.
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. 123251)
絶滅寸前の危機的状況 (CR) (A2bcde; B2ab(i,ii,iii,iv,v)); Date assessed: 24 October 2009
協力者画像Stamps, Coins Misc.音シガテラ（食中毒の名前）速度泳ぐ 型式カマOtoliths脳視覚
Estimates based on models
Preferred temperature (Ref. 115969
): 14.7 - 18.2, mean 17.4 °C (based on 12 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00316 (0.00141 - 0.00709), b=3.17 (2.99 - 3.35), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245
栄養段階 (Ref. 69278
): 3.4 ±0.50 se; based on food items.
回復力 (Ref. 120179
): 非常に低い, １４年以上の倍増期間の最小個体群 (Preliminary K or Fecundity.).
弱み (Ref. 59153
): Very high vulnerability (86 of 100) .