分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins)
脂鯉目 (Characins) >
Characidae (Characins; tetras)
脂鯉科 (Characins; tetras) > Stethaprioninae
Etymology: Deuterodon: Greek, deuter = second + Greek, odous = teeth (Ref. 45335).
More on author: Eigenmann.
Issue
See Géry, 1977:579 for comments and Bizerril, 1994:65 for key.
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 底中水層性. 熱帶
South America: coastal basins of southeastern Brazil.
南美洲: 巴西東南方的海岸流域。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 8.1 cm SL 雄魚/尚未辨別雌雄; (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).
棲息於溪流與河川底部為砂質或泥質的地方。 覓食在白天期間與大小與外型相同獵物類型的魚群 , 本屬 Astyanax 的例如南美產的熱帶魚混合, 並且吃他們的鱗片。 這一個吃鱗片的魚類的相似處用它的習慣獵物是一個侵略性擬態的例子.(參考文獻 40388) 魚藉由斜地對它的後面放置它本身跟隨接近地屬意的獵物; 攻擊在獵物的側面用它的嘴張的很大, 鱗片在快的咬的時候被弄掉。 掉下的鱗片緊鄰被吞，而且掠食者重新與它的獵物形成魚群。 第四個齒骨齒, 最重要的對於刮下鱗片, 已經在 1.9 SL 被在稚魚區別。 吃鱗片的習慣可能經過同種間的侵略行為有一個主要社會的起源。 除鱗片之外，它偶而吃昆蟲，極小的甲殼動物與植物。 (參考文獻 28733)
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔魚
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)
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01202 (0.00548 - 0.02637), b=3.08 (2.90 - 3.26), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.2 ±0.49 se; based on food items.
回復力 (Ref.
120179): 高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
