分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Osmeriformes (Freshwater smelts)
胡瓜魚目 (Freshwater smelts) >
Osmeridae (Smelts)
胡瓜魚科 (Smelts)
Etymology: Hypomesus: Greek, hypo = under + Greek,mesos = a half (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水; 半鹹淡水 大洋性; 溯河洄游 (Ref. 51243). 溫帶; 73°N - 38°N (Ref. 26213)
North America: Sacramento-San Joaquin Delta region in central California, USA.
北美洲: 在美國加州中部中的薩克拉門托河- 聖約昆河的三角州區域。
Length at first maturity / 大小 / 重量 / 年齡
Maturity: Lm ?, range 6 - ? cm
Max length : 12.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 5723); common length : 6.3 cm TL 雄魚/尚未辨別雌雄; (Ref. 12193); 最大年齡: 1.00 年 (Ref. 12193)
背棘 (總數) : 0; 背的軟條 (總數) : 9 - 11; 臀棘: 0; 臀鰭軟條: 16 - 20; 脊椎骨: 52 - 57. Vomer without posterior process; periphery of glossohyal bone with single row of conical teeth, central part toothless; pyloric caeca 4(2-5); base of adipose fin more than 20% of head length; eye large; adipose eyelid poorly developed.
沒有在後部的突起的犛骨; 上舌骨的外圍有單列的錐形齒，中央的部份無齒的; 幽門的盲腸 4;(2-5) 脂鰭超過 20% 的頭長基底; 眼大的; 脂眼瞼發展不良的。
Adults occur in open brackish and freshwater of large channels. Diet consists of zooplankton (Ref. 33312).
成魚出現在大峽道的開放半鹹淡水與淡水。 食物由浮游動物組成。 (參考文獻 33312)
Eggs are demersal (Ref. 33312).北美洲: 在美國加州中部中的薩克拉門托河- 聖約昆河的三角州區域。
Saruwatari, T., J.A. López and T.W. Pietsch, 1997. A revision of the ormerid genus Hypomesus Gill (Teleostei: Salmoniformes), with a description of a new species from the southern Kuril Islands. Species Diversity 2:59-82. (Ref. 33312)
IUCN 瀕危狀態 (Ref. 130435)
極危 (CR) (A2bce); Date assessed: 17 February 2012
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5313 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00372 (0.00182 - 0.00758), b=3.17 (2.99 - 3.35), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.2 ±0.1 se; based on diet studies.
回復力 (Ref.
120179): 高度, 族群倍增時間少於 15個月 (tm=1; tmax=1).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
