Stygichthys typhlops Brittan & Böhlke, 1965
Blind tetra
分类 / 名称 俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei > Characiformes (Characins) > Acestrorhamphidae (American tetras) > Stygichthyinae
Etymology: Stygichthys: Greek, stygos = the underworld of ancient Greece mithology + Greek, ichthys = fish (Ref. 45335).
Etymology: Stygichthys: Greek, stygos = the underworld of ancient Greece mithology + Greek, ichthys = fish (Ref. 45335).
环境：氛围 / 气候带 / 深度上下限 / 分布范围 生态学
; 淡水 大洋性. 熱帶; 16°S - 20°S
分布 领土 | FAO区域 | 生态系 | 标本纪录 | 分布图 | 简介 | Faunafri
South America: upper São Francisco River basin in Minas Gerais, Brazil.
南美洲: 在 Minas Gerais 巴西的 Sao 弗朗西斯科河流域上游。
南美洲: 在 Minas Gerais 巴西的 Sao 弗朗西斯科河流域上游。
大小 / 重量 / 年龄
The specimens were collected from two shallow wells, at Fazenda do Seu Roque which is still occasionally used as a source of water for cattle, and the shallow, abandoned well at Fazenda do Lajeado. Both have similar physico-chemical characteristics, with the pH and conductivity typical of limestone drainages (Fazenda do Seu Roque: pH 6.98, conductivity 0.683 μsm cm−1, 25·3°C and salinity 0·02; Fazenda do Lajeado: pH 7·0, conductivity 0·647 μsm cm−1, 25·8◦ C and salinity 0·02%). Laboratory and field observations demonstrate that this species is predominantly a midwater swimmer; when undisturbed, it remains almost stationary in midwater, with the body inclined at a 10-40° angle, head facing either up or down, or moving slowly, with the mouth slightly open. It is apparently solitary and when in groups (in laboratory), they remain indifferent to each other, not schooling and if there is contact by chance, it is followed by mutual avoidance movements, usually (but not always) with the smaller individual withdrawing for a short distance, some intraspecific agonistic biting attempts during feeding were also observed. The surface feeding behaviour in the laboratory of recently captured individuals, associated with the fact that phreatic waters are generally food-poor, suggests that in nature, these fish concentrate at the upper part of the aquifer where food input is higher in these sectors, as organic matter washes down from the surface. Ostracods were also observed in radiographs of the stomachs of five of the 16 specimens preserved in the field. Specimens were collected with hand nets and minnow-traps baited with commercial fish pellets and dry cat food. During collection with hand-nets in wells, the fish reacted with a quick fleeing movement only when the net was at close range. This reaction plus the limited responsiveness to live prey as initially observed in the laboratory, indicates a low dependence on mechanosensory systems, probably associated with the loss of the lateral line on the body. There is no clear reaction to light, because they are either insensitive to it or behaviourally unresponsive to light conditions (Ref. 84216).
一个盲眼的穴居鱼类。
一个盲眼的穴居鱼类。
生命周期和交配行为 成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
南美洲: 在 Minas Gerais 巴西的 Sao 弗朗西斯科河流域上游。
主要参考文献
上传您的参考资料 | 参考文献 | 合作者 | 合作者
Proudlove, G.S., 1997. A synopsis of the hypogean fishes of the world. p. 351-354. In Proceedings of the 12th International Congress of Speleology, La Chaux de Fonds, Switzerland. vol. 3. (Ref. 27297)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-2 (Global))
濒危 (EN) (B2ab(ii,iii)); Date assessed: 07 November 2018
CITES
Not Evaluated
对人类的威胁
无害处的
人类利用
FAO - Publication: search | FishSource |
更多信息
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身体成分
营养素
耗氧量
游泳类型
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视觉色素
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疾病与寄生虫
毒性（半数致死浓度）
身体成分
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耗氧量
游泳类型
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视觉色素
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疾病与寄生虫
毒性（半数致死浓度）
遗传学
基因组
遗传学
异质性
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基因多样性
基因组
遗传学
异质性
遗传率
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特别资料
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网络资源
AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | 核实 FishWatcher | CISTI | Catalog of Fishes: 属, 种 | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | 树状分类阶层 | Wikipedia: 转至, 搜寻 | World Records Freshwater Fishing | Zoobank | 动物学的记录
基于模型的估算
|
系统发育多样性指数 (参考文献 82804) |
PD50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
| Bayesian length-weight | a=0.01995 (0.00906 - 0.04395), b=3.01 (2.83 - 3.19), in cm total length, based on all LWR estimates for this body shape (Ref. 93245). |
|
营养阶层 (参考文献 69278) |
3.0 ±0.4 se; based on size and trophs of closest relatives |
|
回复力 (参考文献 120179) |
高度, 族群倍增时间少于 15个月 (Preliminary K or Fecundity.). |
|
渔业脆弱性 (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |