分类 / Names
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Teleostei >
Siluriformes (Catfishes) >
Pimelodidae (Long-whiskered catfishes)
Etymology: Brachyplatystoma: Greek, brachys, eia = short + Greek, platys = flat + Greek, stoma = mouth (Ref. 45335); capapretum: The name capapretum is from Portuguese. While seeking information about this undescribed species in Belém, the authors encountered only one person who distinguished the species from the similar "filhote" or "piraiba", B. filamentosum. This o.
Environment: milieu / climate zone / depth range / distribution range
生态学
; 淡水 底中水层性; 深度上下限 5 - 10 m (Ref. 55106). 热带
South America: Amazon River from Belém, Brazil upriver to at least Iquitos, Peru, and several large tributary rivers and lakes including Trombetas, Madeira, Negro, Manacapuru, Purus, Tefé, Juruá, Jutaí, and Içá.
南美洲: 来自 Belem 巴西的亚马孙河上游的到至少伊奇多，秘鲁与一些大的支流河川与湖泊包括 Trombetas ，马得拉群岛，黑人， Manacapuru ， Purus ， Tefe ， Jurua ， Jutai 与 Ica。 在亚马孙河主流与大的白色与黑色的水支流中在 200 公尺 asl 之下捕获; 拖网捕获在 5 到之间的大部份被采的标本 10 公尺深, 100 年代的 10 年代公尺外海的海岸, 在泥到沙子底部上。
大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 58.1 cm SL 雄鱼/尚未辨别雌雄; (Ref. 55106); 最大体重: 32.7 kg (Ref. 72380)
简单描述
检索表 | 型态特徵 | 形态测量图
This species is distinguished by the following characters of which the first three are unique among the Pimelodidae and the last is unique among the Brachyplatystomatini: jaw teeth dimorphic with mostly fine, densely spaced outer teeth and relatively few (3-6) inner rows of slender, straight, inwardly depressible teeth; juveniles (< 200 mm SL, but some as large as 300 mm SL) marked by bold, large (twice or more times eye diameter) dark brown or gray spots centered above lateral line; ground color in preservative tan to medium brown; adults and juveniles (> ca. 200 mm SL) black to very dark gray or brown dorsally and abruptly countershaded along a horizontal from snout tip to caudal-fin base, especially along posterior half of body just above or at lateral line; ventrally it is plain white to dusky cream; most specimens with light patch anterior to upper lobe of caudal fin; caudal fin of adults is moderately to shallowly forked, lobes broad and nearly equal (Ref. 55106).
Brachyplatystoma capapretum 特征为哪一个第一个三在油鲶科之中是独特的下列特征
而且最后的在 rachyplatystomatini 之中很独特。
1. 颌齿双型性的具有大部份细, 浓密地
有间隔的外部齿与相当少见的 (三到六) 内部的列细长的﹐直的, 向内的
可抑压的齿。
2. 稚鱼 (少于 200 mm SL, 但是一些当
大的当 300 mm SL) 有显著的显著, 大的 (两次或更多倍眼直径) 深褐色或灰色的斑点集中在侧线上面; 底色在标本保存狀態下黃褐色的到普通褐色的。
3. 成魚與稚魚 (超過大約 200 mm
SL) 黑色到非常深灰色或褐色背面
而且突然地 countershaded 沿著一水平的
從吻尖到尾鰭基底, 尤其
沿著身體的後半段在或的正上方在側線; 腹全白色到暗色的乳黃色的; 大多數的標本有淡色的小區塊位於尾鰭上葉前。
4. 成魚的尾鰭一般到水淺地
叉型, 葉寬的與幾乎相等的。
Collected below 200 m asl in the Amazon mainstream and largest white and black water triburtaries; trawled 10s to 100s m off shore, on mud and sand substrates (Ref. 55106).
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔鱼
南美洲: 来自 Belem 巴西的亚马孙河上游的到至少伊奇多，秘鲁与一些大的支流河川与湖泊包括 Trombetas ，马得拉群岛，黑人， Manacapuru ， Purus ， Tefe ， Jurua ， Jutai 与 Ica。 在亚马孙河主流与大的白色与黑色的水支流中在 200 公尺 asl 之下捕获; 拖网捕获在 5 到之间的大部份被采的标本 10 公尺深, 100 年代的 10 年代公尺外海的海岸, 在泥到沙子底部上。
Lundberg, J.G. and A. Akama, 2005. Brachyplatystoma capapretum: a new species of Goliath catfish from the Amazon basin, with a reclassification of allied catfishes (Siluriformes: Pimelodidae). Copeia 2005(3):492-516. (Ref. 55106)
世界自然保护联盟红皮书 (Ref. 130435)
临近濒危 (NT) (A2bd); Date assessed: 14 December 2020
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00832 (0.00477 - 0.01449), b=3.10 (2.95 - 3.25), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
营养阶层 (Ref.
69278): 4.2 ±0.8 se; based on size and trophs of closest relatives
回复力 (Ref.
120179): 中等的, 族群倍增时间最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Moderate to high vulnerability (48 of 100).
