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
; 新鮮な水; 汽水性の 底生の; potamodromous (Ref. 51243); 深さの範囲 1 - ? m. Temperate; 72°N - 40°N, 12°E - 103°E
Eurasia: rivers draining to Black, Azov and Caspian Seas; Siberia from Ob eastward to Yenisei drainages. Introduced throughout Europe, without formation of self-sustaining populations. Appendix III of the Bern Convention (protected fauna). International trade restricted (CITES II, since 1.4.98; CMS Appendix II for Danube population).
Length at first maturity / サイズ / 重さ / 年齢
Maturity: Lm 43.0, range 40 - 45 cm
Max length : 125 cm TL オス/雌雄の選別がない; (Ref. 6866); common length : 40.0 cm TL オス/雌雄の選別がない; (Ref. 556); 最大公表体重: 16.0 kg (Ref. 593); 最大記録サイズ: 20 年 (Ref. 556)
形態学 | 形態計測学
背面の脊椎 (合計): 13; 背鰭 (合計): 28; 肛門の骨 9; 臀鰭: 14 - 18. Back and flanks are beige. Five rows of scutes : 12-17D, 57-71L, 10-19V. Ventrals and laterals are very light-colored, nearly white. Narrow and pointed snout with four long and fringed barbels. Inferior lip clearly slit (Ref. 40476). Can be diagnosed from congeners in Europe by having 56-71 lateral scutes, first dorsal scute not fused with head, barbels fimbriate, lower lip interrupted in middle and 11-27 gill rakers (Ref. 59043).
A fluvial fish which inhabits rivers and their tributaries (Ref. 9696). Occurs in large rivers, usually in the current and in deep water. Moves to flooded areas to feed (Ref. 59043). Chiefly potamodromous (Ref. 58897). Like other sturgeons, it aggregates in bottom holes in winter and exhibits little activity. In spring, when ice breaks, it rises from the bottom holes and moves upstream for spawning (Ref. 593). Spawns in habitats with strong-current on gravel, rarely on gravel-sand bottom or in flooded sites. Juveniles stay in riverine habitats during their first summer. Classified as endangered species. Anadromous populations are now extirpated; local populations are still surviving in most parts of range (Ref. 59043).
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Scatters eggs on gravel.
Birstein, V.J., 1993. Sturgeons and paddlefishes: threatened fishes in need of conservation. Conserv. Biol. 7:773-787. (Ref. 6866)
水産業: 商業; 水産養殖: 商業; 水族館・水槽: 公共の水族館
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00141 (0.00082 - 0.00244), b=3.27 (3.12 - 3.42), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245
栄養段階 (Ref. 69278
): 3.6 ±0.4 se; based on diet studies.
Generation time: 9.2 ( na - na) years. Estimated as median ln(3)/K based on 1 growth 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=5-9; tmax=36; K=0.12; Fec=11,000).
弱み (Ref. 59153
): High vulnerability (64 of 100) .