分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Atheriniformes (Silversides)
銀漢魚目 (Silversides) >
Bedotiidae (Madagascar rainbowfishes)
皮杜銀漢魚科 (Madagascar rainbowfishes)
Etymology: Rheocles: Greek, rheos = stream + Greek, kles, kleis = straits; vatosoa: Named for its jewel-like coloration (vatosoa a Malagasy word for crystal or gemstone); noun in apposition.
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 大洋性. 熱帶
Africa: Madagascar.
非洲: 馬達加斯加。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 7.9 cm SL 雄魚/尚未辨別雌雄; (Ref. 42716)
背棘 (總數) : 5 - 7; 背的軟條 (總數) : 11 - 15; 臀棘: 1; 臀鰭軟條: 14 - 18; 脊椎骨: 35 - 38. Different from other congeners by possessing a single interdorsal pterygiophore (versus 3). Distinguished from R. sikorae and R. wrightae by having a shorter upper jaw (32.3-43.7%HL vs. 46.2-59), and the absence of black pigmentation of genital papilla; from R. pellegrini and R. derhami by the full squamation of the nape and chest (vs. naked or partially scaled); from R. lateralis by a shorter caudal peduncle (49-79.8 %SL vs. 84.6-96); and, from R. alaotrensis by predorsal scale row implantation (irregular vs. single row), and longer anal fin base (24.1-30.4 %SL vs. 17.2-21.7 %SL) (Ref. 42716).
藉由持有一個間背片支鰭骨的不同與其他同類.(對 3) 藉由有一個與 R. sikorae 與 R. wrightae 區分了較短的上頜 (32.3-43.7% HL vs.46.2-59), 與那缺乏生殖乳突的黑色顏色; 從 R. pellegrini 與 R. derhami 後頸與胸的藉由完整鱗片的排列;(vs. 裸露的或部份地覆有鱗片的) 從一個較短的尾柄的 R. lateralis;(49-79.8% SL vs.84.6-96) 並且, 從前背鱗片列種植 (不規則的 vs. 單一列) 的 R. alaotrensis, 與較長的臀鰭基底 (24.1-30.4% SL 和 17.2-21.7% SL 比較).(參考文獻 42716)
Collected in the upper and middle reaches of the Lokoho river in the general vicinity of the town of Andapa. Found predominantly in clear streams over gravel or coarse sand bottoms. This streams are characterized by soft, slightly acidic to moderately alkaline water; total and carbonate hardness values < 1°DH and pH 6.8-7.5. Collected from both rapidly flowing rivers and small brooks. Stomach contents almost exclusively of macerated insect remains, most of terrestrial origin. A few remains of aquatic insect larvae suggesting a somewhat opportunistic feeding (Ref. 42716).
在 Andapa 的城鎮的一般鄰近區域中的 Lokoho 河的上游與中游中收集了。 主要在礫石或粗糙的砂質底部上的清澈溪流中發現。 這一個溪流特徵為柔軟, 些微酸性對一般鹼的水; 總數與碳酸硬度 <1 ° DH 與酸鹼度 6.8-7.5. 快速地採集自兩者流動的河與小的小溪了。 胃內含物幾乎只浸軟的昆蟲保持, 大部分的陸棲起源。 意味著略微隨機的進食的一些水生昆蟲幼生殘骸.(參考文獻 42716)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
非洲: 馬達加斯加。
Stiassny, M.L.J., D.M. Rodriguez and P.V. Loiselle, 2002. Rheocles vatosoa, a new species of freshwater rainbowfish (Atherinomorpha: Bedotiidae) from the Lokoho River basin in Northeastern Madagascar. Cybium 26(1):71-77. (Ref. 42716)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-1)
瀕危 (EN) (B1ab(i,ii,iii,v)); Date assessed: 23 June 2016
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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=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
營養階層 (Ref.
69278): 2.6 ±0.28 se; based on food items.
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
