分类 / Names
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Environment: milieu / climate zone / depth range / distribution range
生态学
海洋; 淡水; 半咸淡水 居于水底的; 溯河洄游 (Ref. 51243); 深度上下限 6 - 53 m (Ref. 93286), usually 6 - 34 m (Ref. 93286). 亞熱帶的; 49°N - 28°N, 82°W - 65°W (Ref. 54259)
North America: St. John River in Canada to St. Johns River in Florida, USA.
北美洲: 加拿大的聖約翰河到美國佛羅里達的聖約翰河。 國際間的買賣禁止。 ( 引用 I 自從 1.7.75 以後)
Length at first maturity / 大小 / 重量 / 年龄
Maturity: Lm 50.0, range 45 - 55 cm
Max length : 143 cm TL 雄鱼/尚未辨别雌雄; (Ref. 6866); common length : 50.0 cm TL 雄鱼/尚未辨别雌雄; (Ref. 12193); 最大体重: 23.0 kg (Ref. 6866); 最大年龄: 67 年 (Ref. 6866)
背棘 (总数) : 0; 背的软条 (总数) : 33 - 42; 臀棘: 0; 臀鳍软条: 18 - 24. Snout short, bluntly V-shaped, not upturned at tip. Barbels short (Ref. 7251). Absence of fontanelle and post dorsal shields. Single row of pre anal shields, 6-11 (Ref. 4639). Dorsal shields 7-13, lateral shields 22-34 (Ref. 4639). Blackish viscera (Ref. 37032). Head and back dark, lower surface white (Ref. 37032). Anal fin origin beneath dorsal fin origin (Ref. 86798).
吻短, 钝地 V 形的, 尖端不朝上。 触须短.(参考文献 7251) 没有囱门与后背甲。 单列的前肛门的盾甲,6-11.(参考文献 4639) 背甲 7-13 ，侧甲 22-34.(参考文献 4639) 黑色的内脏.(参考文献 37032) 头部与背部深色的, 下表面白色.(参考文献 37032)
Inhabit river mouths, lakes, estuaries, and bays; occasionally enters the open sea. Feeds mostly at night over soft substrates; juveniles feed primarily on benthic crustaceans and insects, adults prey on benthic crustaceans, insects and mollusks (Ref. 93252). Maximum known age is 67 years for females and 30 years for males. Flesh of good quality; eggs are suitable for caviar (Ref. 3192).
栖息于河口，湖，河口与海湾; 偶然地进入开放海域。 最大的已知年龄是 67 年母鱼与雄鱼 30 年。 好品质的肉; 卵适合做成鱼子酱。 (参考文献 3192)
北美洲: 加拿大的聖約翰河到美國佛羅里達的聖約翰河。 國際間的買賣禁止。 ( 引用 I 自從 1.7.75 以後)
Page, L.M. and B.M. Burr, 1991. A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p. (Ref. 5723)
人类利用
渔业: 低经济; 游钓鱼种: 是的; 水族馆: 公众的水族馆
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Estimates based on models
Preferred temperature (Ref.
123201): 7.5 - 25.5, mean 15.6 °C (based on 138 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00324 (0.00142 - 0.00736), b=3.17 (2.99 - 3.35), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
营养阶层 (Ref.
69278): 3.3 ±0.39 se; based on food items.
回复力 (Ref.
120179): 非常低的, 最小族群倍增时间超过14 年 (K=0.04; tm=14-17; tmax=67; Fec=48,000).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (86 of 100).
