分类 / Names
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Gymnotiformes (Knifefishes) >
Sternopygidae (Glass knifefishes)
Etymology: Sternopygus: Greek, sternon = sternon, + Greek, pyge = tail (Ref. 45335); branco: Specific epithet from the Portuguese word meaning white, referring to the characteristic pale color of freshly netted live specimens; noun in apposition..
Environment: milieu / climate zone / depth range / distribution range
生态学
; 淡水 底中水层性. 热带
South America: Amazon River, Brazil.
南美洲: 亚马孙河巴西。
大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 49.2 cm TL 雄鱼/尚未辨别雌雄; (Ref. 52797)
简单描述
检索表 | 型态特徵 | 形态测量图
臀鳍软条: 250 - 340.
Occurs in the main channels of major rivers or side branches; not known to occur in seasonally inundated floodplain forests or in forest steams of the Amazon's terra firme. In the Tefé region, this species is caught with beach seines and trawl nets at depth up to 10 meters in areas with weak currents, such as in large eddies, sheltered bays or "paranás" (side-branches of the main river channels that wind their way through the whitewater "várzea" floodplain); occurs syntopically with Sternopygus macrurus in whitewater habitats, but never with Sternopygus atrabes. This species does not occur where currents near the substrate exceeded 0.1 m/sec. At daytime it is usually encountered near submerged structures such as fallen trees and driftwood, and at night it moves into shallower water and away from structures. Specimens are collected on both sand and mud bottoms. It does not live in groups as indicated by electrode surveys and its sporadic occurrence in nets. Sexually mature males were never encountered, but gravid females were found along the edge of whitewater floodplain areas and in paraná channels during the rising water months of January and February. Feeds mainly on autochthonous insect larvae which it encounters on the substrate; the presence of small pieces of wood in many of the stomachs indicate that it forages among organic detritus on the river bed rather than within rafts of floating meadows or marginal macrophytes (Ref. 55493).
出现于主要河的主水道或支流; 不知道季节性地出现在浸水了洪泛区森林或在亚马孙河的地 firme 的森林蒸气中。 在 Tefe 区域中，这种被用海滩围网与拖网捕获在深度达到 10 公尺在有弱的水流的区域中, 例如大的涡流, 掩蔽的海湾或者 " paranas";(转动的主要河道的支流他们的方法经过白水的 " varzea" 洪泛区) 出现在白水的栖息地与 Sternopygus macrurus 有邻接关系, 但是从不以 Sternopygus atrabes. 这种不会出現在底部附近的水流在它通常是在水下的結構附近見到例如落下來的樹與流木的白天超過了 0.1 公尺/秒的地方,而在它移入較淺的水域而且遠離結構的夜晚。 標本在兩者的沙與泥底部上被收集。 在網中的如電極調查與它的分散發生所指出的它不會群居生活。 性成熟的雄魚從不被見到, 但是懷孕的雌性被發現沿著白水洪泛區區域的邊緣與在 parana 峽道中在上升的水數個月的一月與二月期間。 主要吃土生土長的昆蟲幼生它在底部上的相會; 那有在許多腹部中的小木材指出，它在河床上的有機碎屑之中覓食而不是在漂浮草地或邊緣的大型植物的筏裡面.(參考文獻 55493)
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔鱼
南美洲: 亚马孙河巴西。
Crampton, W.G.R., K.G. Hulen and J.S. Albert, 2004. Redescription of Sternopygus obtusirostris (Gymnotiformes: Sternopygidae) from the Amazon basin, with description of osteology, ecology and electric organ discharges. Ichthyol. Explor. Freshwat. 15(2):121-134. (Ref. 52797)
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
营养阶层 (Ref.
69278): 2.6 ±0.27 se; based on food items.
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (39 of 100).
