分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Siluriformes (Catfishes)
鯰形目 (Catfishes) >
Pangasiidae (Shark catfishes)
鯰科 (Shark catfishes)
Etymology: Helicophagus: Greek, helike = spiral + Greek, phagein = to eat (Ref. 45335).
More on authors: Ng & Kottelat.
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 居於水底的. 熱帶
Asia: Chao Phraya and Mekong River drainages in Indochina.
亞洲: 湄南河與在印度支那的湄公河流域。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 47.2 cm SL 雄魚/尚未辨別雌雄; (Ref. 43281)
背棘 (總數) : 1; 背的軟條 (總數) : 6 - 7; 臀鰭軟條: 35 - 42; 脊椎骨: 46 - 48. Can be differentiated from all its congeners by the following combination of characters: length of anal-fin base 34.5-38.2% SL, length of caudal peduncle 12.9-15.3% SL, head length 20.8-22.8% SL, eye diameter 16.1-21.2% HL, 9-12 gill rakers on the first branchial arch (Ref. 39387). Snout relatively elongate, conical in dorsal view; mouth narrow, with 20-25 times in SL; posterior nostril midway between anterior nostril and eye (Ref. 43281).
能在組合特徵之後被從它所有的同類區別藉由: 臀鰭基底 34.5-38.2% SL 的長度，尾柄 12.9-15.3% SL ，頭長 20.8-22.8% SL 的長度, 眼直徑 16.1-21.2% HL,9- 在第一個鰓弓上的 12個鰓耙.(參考文獻 39387) 吻相當延長, 錐形從背面觀察; 嘴狹窄的, 隨著標準體長比率 20-25; 在前鼻孔與眼之間的後鼻孔中途.(參考文獻 43281)
Occurs in permanent river channels and does not move into flooded areas. Migrates upstream when water levels begin to rise at the beginning of the flood season and moves downstream as the water clears at the end of the flood season. Feeds predominantly on bivalves.
出現於永久的河道與不會移進洪泛區中。 在洪水季節的起點水位開始上升的時候時溯河迴游而且降河移動當水清澈的在洪水季節結束的時候。 主要捕食二枚貝。
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔魚
亞洲: 湄南河與在印度支那的湄公河流域。
Ng, H.H. and M. Kottelat, 2000. Helicophagus leptorhynchus, a new species of molluscivorous catfish from Indochina (Teleostei: Pangasiidae). Raffles Bull. Zoll. 48(1):55-58. (Ref. 39387)
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00457 (0.00217 - 0.00962), b=3.09 (2.90 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 2.8 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (43 of 100).
