分类 / Names
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Issue
See Géry, 1977:579 for comments and Bizerril, 1994:65 for key.
Environment: milieu / climate zone / 深度上下限 / distribution range
生态学
; 淡水 底中水层性. 熱帶
分布
国家 | FAO区域 | 生态系 | 标本纪录 | 分布图 | 简介 | Faunafri
South America: coastal basins of southeastern Brazil.
南美洲: 巴西東南方的海岸流域。
大小 / 重量 / 年龄
成熟度: Lm ? range ? - ? cm
Max length : 8.1 cm SL 雄鱼/尚未辨别雌雄; (Ref. 38376); 10.4 cm SL (female)
Inhabits streams and rivers with sandy to muddy bottom. Forages during the day mingling with schools of similarly sized and looking prey types, such as tetras of the genus Astyanax, and feeds on their scales. The resemblance of this scale-eater with its habitual prey is an example of aggressive mimicry (Ref. 40388). The fish follows closely the intended prey by placing itself obliquely to its rear; strikes at prey's flank with its mouth widely open, the scales being removed during a quick bite. Removed scales are swallowed immediately and the predator resumes schooling with its prey. The fourth dentary teeth, the most important one for scale removal, is already differentiated in juveniles at 1.9 SL. The scale-eating habit may have a primarily social origin through inter-specific aggression. Besides scales, it occasionally takes insects, tiny crustaceans and plant material (Ref. 28733).
栖息于溪流与河川底部为砂质或泥质的地方。 觅食在白天期间与大小与外型相同猎物类型的鱼群 , 本属 Astyanax 的例如南美产的热带鱼混合, 并且吃他们的鳞片。 这一个吃鳞片的鱼类的相似处用它的习惯猎物是一个侵略性拟态的例子.(参考文献 40388) 鱼藉由斜地对它的后面放置它本身跟随接近地属意的猎物; 攻击在猎物的侧面用它的嘴张的很大, 鳞片在快的咬的时候被弄掉。 掉下的鳞片紧邻被吞，而且掠食者重新与它的猎物形成鱼群。 第四个齿骨齿, 最重要的对于刮下鳞片, 已经在 1.9 SL 被在稚鱼区别。 吃鳞片的习惯可能经过同种间的侵略行为有一个主要社会的起源。 除鳞片之外，它偶而吃昆虫，极小的甲壳动物与植物。 (参考文献 28733)
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
南美洲: 巴西東南方的海岸流域。
Terán, G.E., M.F. Benitez and J.M. Mirande, 2020. Opening the Trojan house: phylogeny of Astyanax, two genera and resurrection of Psalidodon (Teleostei: Characidae). Zool. J. Lin. Soc. 190(4):1217-1234. (Ref. 123753)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-1)
人类利用
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Estimates based on models
Phylogenetic diversity index (参考文献
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01096 (0.00498 - 0.02415), b=3.09 (2.92 - 3.26), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
营养阶层 (参考文献
69278): 3.2 ±0.49 se; based on food items.
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.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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