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) >
Parodontidae (Scrapetooths)
下口半脂鯉科 (Scrapetooths)
Etymology: Apareiodon: Greek, a = without + Greek, pareia, -as = cheek + Greek, odous = teeth (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 底中水層性; pH range: 4.9 - 7.0; dH range: ? - 18. 熱帶; 20°C - 25°C (Ref. 13614)
South America: Orinoco River basin and the coastal basins of French Guiana, Guyana and Suriname.
南美洲: 奧里諾科河河流域與法屬圭亞那，蓋亞那與蘇利南的海岸流域。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 9.2 cm SL 雄魚/尚未辨別雌雄; (Ref. 10296)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背的軟條 (總數) : 11 - 12; 臀鰭軟條: 9 - 10; 脊椎骨: 39 - 41. It differs from all congeners by possessing two ventrolateral rows of dark spots aligned along the horizontal lines where first and second and second and third scale rows below lateral-line scale row overlap (one or both rows of spots coalesce into narrow zigzag stripes in most specimens, upper row occasionally poorly developed); by possessing patches of dark pigment extending along the anal fin base and on the ventral midline of the caudal peduncle to the caudal fin base. Another distinguishing feature is the insertion of the first pterygiophore of the dorsal fin after vertebra 13 or 14 vs. 10 to 12 (rarely 13) in other species (reflected in a mean predorsal distance exceeding 0.50 of SL in A. gransabana vs. less than 0.50 in other species); distinguished from all congeners except A. guyanensis by the usual presence of 5 (occasionally 6) teeth (not counting replacement teeth) on each premaxillary bone vs. 4 in other species. Teeth of A. gransabana are gently convex with about 10-12 cusps, whereas those of A. guyanensis are spade-shaped with a highly convex margin and about 14-15 cusps, further differing from all congeners by the presence of 10-11 vertical scale rows vs. usually 9. A. gransabana has a notably more laterally compressed, parallel-sided body than its characteristically terete congeners (body width/dorsal-fin origin to pelvic-fin insertion distance less than 0.60 vs. usually 0.70 or more); and the isthmus is approximately one-half as wide; the caudal peduncle is more constricted (least depth/dorsal origin to pelvic-fin base distance averages 0.43 versus 0.450-0.570 or more in other species with ranges rarely overlapping).
它有別於所有同類藉由持有被排列的二腹側的列深色的斑點沿著水平線在哪裡第一個與第二個與第二個與第三個鱗片列在側線下鱗片列重疊;(一或者兩者的列斑點在大多數的標本中合併成狹窄的曲折斑紋, 上面的列偶然地發展不良的) 藉由持有深色的延伸的區塊沿著臀鰭基底與在尾梗到尾鰭基底的腹中線上。 另外有區別的特徵是背鰭的第一個支鰭骨的嵌入在脊椎骨 13 或 14之後 vs.10 到 12(很少地 13) 在其他的種方面;(在 A. gransabana 中超過 SL 中的 0.50 的平均的前背距離方面反映 vs. 少於 0.50 在其他的種方面) 與除了 A. guyanensis 以外的所有同類區分了藉由平常的有在每個上頜骨前的硬骨 5(偶然地 6)個齒 (不計算替換齒) vs.4 在其他的種方面。 A. gransabana 的齒逐漸中凸大約 10-12 尖頭, 然而 A. guyanensis 的是具有一個的鏟形的 , 高度中凸的邊緣大約 14-15個尖頭, 進一步不同於所有的同類藉由有 10-11 垂直的鱗片列 vs. 通常 9. A. gransabana 超過它的表示特性圓柱形同類有一個特別更側扁又平行-邊的身體;(身體寬度/ 背鰭起點到腹鰭嵌入距離少於 0.60 vs. 通常 0.70個或更多) 而且峽部大約一半當寬的; 尾梗是被壓縮的更多。 (對腹鰭基底距離的最少深度/ 背鰭起點以範圍對 0.450-0.570個或更多在其他的種方面平均 0.43 非部分重疊的)
Occurs in small streams mostly less than 10 m width in rocky areas with moderate to strong current. Schools of 20-40 individuals were found to swim in strong current near the substratum with a head-downward orientation. In reaches with moderate current, these fish usually swam higher above the substratum, and with more horizontal body orientation. Attains at least 9.2 cm SL.
在岩石區有中等的到強的水流中出現於小的溪流大部份少於 10 公尺寬度。 20-40個個體的魚群被發現在下層土壤附近的強的水流中游泳具有一個頭部-向下的方位。 在範圍方面以平穩的水流，這些魚通常游泳更高地高於下層土壤, 而且有更水平的身體方位。 達到至少 9.2 公分 SL 。
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
南美洲: 奧里諾科河河流域與法屬圭亞那，蓋亞那與蘇利南的海岸流域。
Starnes, W.C. and I. Schindler, 1993. Comments on the genus Apareiodon Eigenmann (Characiformes: Parodontidae) with the description of a new species from the Gran Sabana Region of eastern Venezuela. Copeia 1993(3):754-762. (Ref. 10296)
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=0.01023 (0.00374 - 0.02799), b=3.06 (2.82 - 3.30), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
回復力 (Ref.
120179): 中等的, 族群倍增時間最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
