分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins) >
Serrasalmidae (Piranhas and pacus) > Serrasalminae
Etymology: Serrasalmus: Latin, serran, serranus, saw and a fish of genus Serranus + Latin, salmo = salmon (Ref. 45335).
More on author: Valenciennes.
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 底中水層性. 熱帶
South America: Paraguay-Paraná River basin.
南美洲: 巴拉圭- 巴拉納河的流域。
Length at first maturity / 大小 / 重量 / 年齡
Maturity: Lm 12.2 range ? - ? cm
Max length : 27.1 cm TL 雄魚/尚未辨別雌雄; (Ref. 115169); 32.4 cm TL (female); 最大體重: 440.00 g (Ref. 115169); 最大體重: 440.00 g
Feeds mainly during the daytime, though some large fish (15-20 cm SL) extend their foraging activity to dusk (about 1800-1900H). Night is spent sheltered among vegetation. Small-sized to medium-sized fish (7-10 cm) are solitary and patrol feeding territories (3-4 square m.) in a way similar to that reported for the scale-eating Catoprion mento. Stalking with some use of plant cover is a frequent mode of hunting employed by S. marginatus. It approaches its prey with a slow, stealthy movement from behind or below. It strikes its prey on the tail or anal fin, of which a piece is clipped out with a jerking motion of the body. This clipping is audible underwater. Lurking is also employed during daytime (Ref. 9080).
主要在白天期間覓食, 雖然一些大的魚 (15-20 公分 SL) 把他們的覓食活動延伸到薄暮。 (大約 18001900H 的) 夜晚被花費在植物之中隱匿。 小型到中等大小的魚 (7-10 公分) 是獨居性的而且巡邏攝食領域 (3-4 平方公尺.) 在一定程度上類似以為吃鱗片的 下鋸脂鯉〔Catoprion mento〕 報告。 悄悄靠近有一些植物表面的使用是被 S. marginatus 利用的一個獵食的常用模式. 它從後面或下面接近它的獵物緩慢地又祕密的運動。 它攻擊獵物的尾部或者臀鰭, 其中塊被修剪出具有一個痙攣身體的運動。 這一個剪斷是聽得見的在水中的。 潛藏也被利用在白天期間。 (參考文獻 9080)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
南美洲: 巴拉圭- 巴拉納河的流域。
Jégu, M., 2003. Serrasalminae (Pacus and piranhas). p. 182-196. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 39031)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-1)
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01318 (0.01068 - 0.01627), b=3.16 (3.11 - 3.21), in cm total length, based on LWR estimates for this species (Ref.
93245).
營養階層 (Ref.
69278): 3.6 ±0.56 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 (22 of 100).
