分類 / Names
共通名の | 類義語 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Environment: milieu / climate zone / depth range / distribution range
; 新鮮な水 底生の漂泳性; pH range: 6.0 - 7.5; dH range: ? - 15; potamodromous (Ref. 51243). Subtropical; 22°C - 28°C (Ref. 1672)
Central and South America: southern Mexico to Paraguay, including Trinidad.
Length at first maturity / サイズ / 重さ / 年齢
Maturity: Lm 19.4, range 25 - ? cm
Max length : 76.0 cm TL オス/雌雄の選別がない; (Ref. 79585); 最大公表体重: 1.2 kg (Ref. 79585)
Aggressive (Ref. 27188). Inhabits turbid slow moving or standing waters (Ref. 11225). Found also in shallow edges of streams (Ref. 75964). Can survive when ditches, canals and small ponds dry out. (Ref. 11225). Feeds mainly at night on worms, insects (e.g. odonate larvae), shrimps, fish (preferably small characids, e.g. Ctenobrycon and Curimata) and plant matter (Ref. 7020; 10011). Oviparous (Ref. 205). Mouth brooding by males is observed in this species (Ref. 55570). Males provide parental care in nests excavated for eggs and larvae (Ref. 55570). Uses its long anal fin for locomotion. Can distinguish between a `friendly neighbor' and a potentially `threatening stranger' based on electric organ discharge (EOD) waveform alone (Ref. 10011). Relationship between EOD pattern and agonistic behavior in this species has been demonstrated (Refs. 10531, 10532, 10533). Shows auditory abilities, responding best to a frequency of 1000 Hz, with an upper limit above 5000 Hz (Ref. 10831). Also responds to vibratory stimuli (water waves: 125-250 Hz) with transient increase in EOD rate (Ref. 10834). 'Prefers' temperatures of 24-25°C (Ref. 10836).
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Parental care is provided by the male. The male sits on a depression with its anal fin expanded horizontally guarding a cluster of larvae. More larvae are spread out in leaf litter up to 2 m away (Ref. 55570).
Campos-da-Paz, R., 2003. Gymnotidae (Naked-back knifefishes). p. 483-486. 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. 36692)
CITES (Ref. 118484)
水産業: 興味がない; 水族館・水槽: 商業
協力者画像Stamps, Coins Misc.音シガテラ（食中毒の名前）速度泳ぐ 型式カマOtoliths脳視覚
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00355 (0.00263 - 0.00478), b=2.96 (2.87 - 3.05), in cm Total Length, based on LWR estimates for this species (Ref. 93245
栄養段階 (Ref. 69278
): 3.6 ±0.56 se; Based on food items.
Generation time: 3.6 ( na - na) years. Estimated as median LN(3)/K based on 2 growth studies.
回復力 (Ref. 120179
): 手段, １．４年～４．４年の倍増期間の最小個体群 (tm=2).
弱み (Ref. 59153
): Moderate vulnerability (37 of 100) .