分类 / Names
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Siluriformes (Catfishes) >
Trichomycteridae (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
生态学
; 淡水 居于水底的. 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 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 14.0 cm SL 雄鱼/尚未辨别雌雄; (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).
在大西洋的森林中发现于溪流了; 洄水区没有对 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动的陡峭的丘陵溪流中在小的瀑布之下在水池中居住。 密度从每平方公尺 3 到 25个个体改变。 在 18 到 25个每平方公尺个体的密度，鱼在向上到的松散的鱼群 30个个体中聚集; 大的一些倾向独居性的与具有领域性。 自游性, 活跃的两者都在白天期间而在夜晚; 达到 9 公分TL 的稚鱼与小成鱼在白天更活跃, 然而较大的一些大部份在晚上是活跃的。 使用视觉的，有触觉的, 与 chemo-知觉的方位在水团觅食底栖的水生而陆栖的节肢动物或在表面上。 食物包括不成熟的水生昆虫，甲壳动物，成鱼陆栖的有翼昆虫全部或碎片, 以及腐肉。 大部份藉由扫描底部觅食, 触须碰触底部, 但是视觉的导向漂流物进食也被利用个体向上到 5 公分TL。 觅食可能进入沙子或者植物残枝之内埋藏而且筛撒过鳃盖开口与嘴。 在雨季 (南的夏天) 的开始繁殖。 成熟卵母细胞大约 0.2 公分直径; pterigyolarvae 排列 1-1.5 公分TL 。 有斑点的彩色斑纹在溪流族群之间一贯地差异, 一个遗传区别的指证.(参考文献 50917)
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
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)
世界自然保护联盟红皮书 (Ref. 130435: Version 2024-2)
临近濒危 (NT) (B1b(iii)); Date assessed: 07 November 2018
人类利用
渔业: 自给性渔业
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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).
营养阶层 (Ref.
69278): 3.4 ±0.46 se; based on food items.
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
