分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Siluriformes (Catfishes)
鯰形目 (Catfishes) >
Heptapteridae (Three-barbeled catfishes)
七鰭鯰科 (Three-barbeled catfishes)
Etymology: Rhamdia: Brazilian vernacular name, Nhamdia/Jamdia (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 底中水層性. 熱帶
South America: Tocantins River basin, Brazil.
南美洲: 巴西。
大小 / 重量 / 年齡
Maturity: Lm ?  range ? - ? cm
Max length : 23.8 cm SL 雄魚/尚未辨別雌雄; (Ref. 36914)
簡短描述
型態特徵 | 形態測量圖
背棘 (總數): 1; 背的軟條 (總數): 6. Rhamdia itacaiunas is diagnosed from all congeners by the pectoral fin spine with serrations on both sides; caudal fin upper lobe pointed and longer than lower lobe; mouth deeply cleft to near the vertical at the anterior margin of the eye; eyes in advanced position, distinctly closer to the snout than to the operculum hind margin; adipose fin 23.3-28.4% of SL or 96.2-127% of HL; maxillary barbel 41.2-53.8% of SL or 190-231% of HL; broad tooth plates.
Rhamdia itacaiunas 在兩邊上被用鋸齒從所有的同類鑑定藉由胸鰭棘; 尾鰭上葉尖而長度超過下葉; 深深地劈開的嘴到在眼的前緣的垂直者的附近; 眼預先位置, 超過到鰓蓋後緣的明顯更靠近吻部; 脂鰭 23.3-28.4% 的 SL 或 96.2-127% 的 HL; 上頜骨觸鬚 41.2-53.8% 的 SL 或 190-231% 的 HL; 寬的齒板。
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
南美洲: 巴西。
Silfvergrip, A.M.C., 1996. A systematic revision of the Neotropical catfish genus Rhamdia (Teleostei, Pimelodidae). Stockholm University and Swedish Museum of Natural History. 156 pp. + 8 pls. (Ref. 50029)
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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=0.00776 (0.00362 - 0.01664), b=2.98 (2.80 - 3.16), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.6 ±0.4 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 非常低的, 最小族群倍增時間超過14 年 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (19 of 100).