Common names from other countries
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) >
Trichomycteridae (Pencil or parasitic catfishes)
毛鼻鯰科 (Pencil or parasitic catfishes) > Trichogeninae
Etymology: Trichogenes: Greek, thrix = hair + Greek, genes, genesis = birth, race (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 居於水底的. 熱帶; 20°C - 24°C (Ref. 13614)
South America: coastal streams between Rio de Janeiro and São Paulo States, Southeastern Brazil. Due to restricted distribution, specialized habitat, and differentiated populations, the vulnerable (VU B1+2bc) status in the IUCN List is proposed (Ref. 50917).
南美洲: 在里約熱內盧與聖保羅美國，巴西東南方之間的海岸溪流。 由於侷限的分佈, 特殊化棲息地, 而且區別了族群, 在 IUCN 目錄的易受傷害的 (VU B1+2 bc) 狀態被提議.(參考文獻 50917)
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 14.0 cm SL 雄魚/尚未辨別雌雄; (Ref. 50917); 10.6 cm SL (female)
Found in streams in the Atlantic forest; backwaters with no flow to 0.44 meter per second water flow. Dwells mostly in pools beneath small waterfalls in steep hill streams flowing over rocky and sandy substrates. Density varies from 3 to 25 individuals per square meter. At densities of 18 to 25 individuals per square meter, fish aggregates in loose groups of up to 30 individuals; largest ones tend to be solitary and territorial. Nektonic, active both during daytime and at night; juveniles and small adults of up to 9 cm TL are more active at daytime, whereas larger ones are active mostly at night. Uses visual, tactile, and chemo-sensory orientation to feed on bottom-dwelling aquatic and terrestrial arthropods in the water column or on the surface. Diet includes immature aquatic insects, crustaceans, adult terrestrial winged insects whole or fragmented, as well as carrion. Forages mostly by scanning the bottom, the barbels touching the substrate, but visual oriented drift feeding is also employed by individuals up to 5 cm TL. While foraging may bury into sand or plant debris and sifts through opercular openings and mouth. Reproduces at the onset of rainy season (austral summer). Mature oocytes about 0.2 cm diameter; pterigyolarvae range 1-1.5 cm TL. Spotted color pattern differs consistently between stream populations, an indication of genetic differentiation (Ref. 50917).
在大西洋的森林中發現於溪流了; 洄水區沒有對 0.44 公尺每秒水水流的水流。 大部份在岩石而沙的底部之上流動的陡峭的丘陵溪流中在小的瀑布之下在水池中居住。 密度從每平方公尺 3 到 25個個體改變。 在 18 到 25個每平方公尺個體的密度，魚在向上到的鬆散的魚群 30個個體中聚集; 大的一些傾向獨居性的與具有領域性。 自游性, 活躍的兩者都在白天期間而在夜晚; 達到 9 公分TL 的稚魚與小成魚在白天更活躍, 然而較大的一些大部份在晚上是活躍的。 使用視覺的﹐有觸覺的, 與 chemo-知覺的方位在水團覓食底棲的水生而陸棲的節肢動物或在表面上。 食物包括不成熟的水生昆蟲，甲殼動物，成魚陸棲的有翼昆蟲全部或碎片, 以及腐肉。 大部份藉由掃描底部覓食, 觸鬚碰觸底部, 但是視覺的導向漂流物進食也被利用個體向上到 5 公分TL。 覓食可能進入沙子或者植物殘枝之內埋藏而且篩撒過鰓蓋開口與嘴。 在雨季 (南的夏天) 的開始繁殖。 成熟卵母細胞大約 0.2 公分直徑; pterigyolarvae 排列 1-1.5 公分TL 。 有斑點的彩色斑紋在溪流族群之間一貫地差異, 一個遺傳區別的指證.(參考文獻 50917)
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔魚
南美洲: 在里約熱內盧與聖保羅美國，巴西東南方之間的海岸溪流。 由於侷限的分佈, 特殊化棲息地, 而且區別了族群, 在 IUCN 目錄的易受傷害的 (VU B1+2 bc) 狀態被提議.(參考文獻 50917)
Burgess, W.E., 1989. An atlas of freshwater and marine catfishes. A preliminary survey of the Siluriformes. T.F.H. Publications, Inc., Neptune City, New Jersey (USA). 784 p. (Ref. 6868)
IUCN 瀕危狀態 (Ref. 130435)
近危 (NT) (B1b(iii)); Date assessed: 07 November 2018
CITES (Ref. 128078)
Not Evaluated
人類使用
漁業: 自給性漁業
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm Total Length, based on all LWR estimates for this body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.4 ±0.46 se; based on food items.
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
