Rasboroides vaterifloris (Deraniyagala, 1930)
Pearly rasbora
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Rasboroides vaterifloris
图片提供人 Terceira, A.C.
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图片提供人 Terceira, A.C.
分类 / 名称 俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
环境：氛围 / 气候带 / 深度上下限 / 分布范围 生态学
; 淡水 底中水层性; pH range: 6.0 - 6.0; dH range: 5 - 8. 熱帶; 25°C - 29°C (Ref. 2060); 7°N - 6°N
分布 领土 | FAO区域 | 生态系 | 标本纪录 | 分布图 | 简介 | Faunafri
Asia: restricted to the Kalu basin, Sri Lanka.
亞洲: 發現只在卡盧河到 Nilwala 流域，斯里蘭卡的中央集水區中。
亞洲: 發現只在卡盧河到 Nilwala 流域，斯里蘭卡的中央集水區中。
大小 / 重量 / 年龄
简单描述 检索表 | 型态特徵 | 形态测量图
背的软条 (总数) : 10; 臀鳍软条: 8 - 9; 脊椎骨: 29. Rasboroides vaterifloris is distinguished from its congener R. nigromarginatus by the location of pelvic-fin origin which is midway between the pectoral-fin base and anal-fin origin (vs. closer to anal-fin origin), by having the dorsal margin of the operculum more or less straight (vs. with a deep indentation), and the dorsal profile of the head approximately straight (vs. slightly concave) behind the level of the eye in males. Males of R. vaterifloris can be diagnosed from
those of R. nigromarginatus by having a greater interorbital width (29-33 % HL, vs. 17-22) and a greater internarial width (19-21 % HL, vs. 11-17), while females differ by having a greater anal-fin depth (23.5-24.8 % SL, vs. 17.4-22.7), a greater interorbital width (25-33 % HL, vs. 16-21), a greater caudal-peduncle depth (12.4-13.4 % SL, vs. 10.4-12.3) and a lesser caudal-peduncle length (18.6-21.2 % SL, vs. 21.1-25.0). It differs from R. pallidus and R. rohani by having the dorsal-fin origin 1 scale-width (vs. 3 scale-widths) behind the pelvic-fin origin and a
lesser body depth of 31.0-32.8 % SL (vs. 33.0-37.5 in R. pallidus and 33.3-40.0 in R. rohani) (Ref. 94541).
Body shape (shape guide): fusiform / normal.
Body shape (shape guide): fusiform / normal.
Occurs in shallow, cool, clear, quiet, heavily shaded forest streams, usually with a silty substrate and often in areas with a large amount of leaf debris in the water. Feeds on terrestrial insects (Diptera and Coleoptera, see Ref. 6469) and detritus. Males slimmer and brightly colored than females.
出现于浅滩, 冷的，清澈的, 安静,很重地遮蔽了森林溪流, 通常有一个淤泥的底部而且常见于区域中在水具有一个大量的树叶碎片。 吃陆栖的昆虫 (双翅类与鞘翅目, 见参考文献 6469) 与碎屑。 雄性减肥者与色彩鲜艳的超过雌性。
出现于浅滩, 冷的，清澈的, 安静,很重地遮蔽了森林溪流, 通常有一个淤泥的底部而且常见于区域中在水具有一个大量的树叶碎片。 吃陆栖的昆虫 (双翅类与鞘翅目, 见参考文献 6469) 与碎屑。 雄性减肥者与色彩鲜艳的超过雌性。
生命周期和交配行为 成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
A prolific breeder. The courtship ritual is frenetic; several batches of about 20 eggs are spawned among submerged marginal vegetation during the course of about 30 minutes. The eggs sink, and hatch in about 36 hours. The free-swimming fry are very delicate and sensitive to water conditions. 亞洲: 發現只在卡盧河到 Nilwala 流域，斯里蘭卡的中央集水區中。
主要参考文献
上传您的参考资料 | 参考文献 | 合作者 | 合作者
Pethiyagoda, R., 1991. Freshwater fishes of Sri Lanka. The Wildlife Heritage Trust of Sri Lanka, Colombo. 362 p. (Ref. 6028)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-2 (Global))
濒危 (EN) (B1ab(iii)+2ab(iii)); Date assessed: 05 August 2019
CITES
Not Evaluated
对人类的威胁
无害处的
人类利用
渔业: 没有兴趣; 水族馆: 商业性
FAO - Publication: search | FishSource |
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基于模型的估算
|
系统发育多样性指数 (参考文献 82804) |
PD50 = 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high]. |
| Bayesian length-weight | a=0.00891 (0.00382 - 0.02082), b=3.02 (2.82 - 3.22), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
|
营养阶层 (参考文献 69278) |
2.8 ±0.32 se; based on food items. |
|
回复力 (参考文献 120179) |
高度, 族群倍增时间少于 15个月 (Preliminary K or Fecundity.). |
|
渔业脆弱性 (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |