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Atheriniformes (Silversides) >
Bedotiidae (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.
पर्यावरण: पर्यावरण / जलवायु क्षेत्र / गहराई सीमा / वितरण सीमा
पारिस्थितिकी
; स्वच्छ जल, अलवण जल पिलाजिक. Tropical
Africa: Madagascar.
आकार / वज़न / आयु
परिपक्व अवधि: Lm ?  range ? - ? cm
Max length : 7.9 cm SL पुल्लिंग / अलिंग; (Ref. 42716)
पृष्ठीय रीढ़ (सम्पूर्ण) : 5 - 7; पृष्ठीय सौफट रेज़ (सम्पूर्ण) : 11 - 15; गुदा कांटा: 1; ऐनल सौफट रेज़: 14 - 18; जानवरों की रीड़ का जोड़: 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).
Body shape (shape guide): elongated; Cross section: oval.
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).
जीवन चक्र और संभोग व्यवहार
परिपक्व अवधि | पुनरुत्पत्ति | मछलीऔ का अंडे देना | अंडे | उपजाऊपन | लार्वा
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)
आईयूसीएन रेड लिस्ट स्थिति (Ref. 130435: Version 2025-2 (Global))
मनुष्यों के लिए ख़तरा
Harmless
मानव उपयोग
साधन
विशेष रिपोर्ट
XML डाउनलोड करें
इंटरनेट स्रोत
मॉडल पर आधारित अनुमान
जातिवृति विविधता सूचकांक (संदर्भ 82804) |
PD50 = 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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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). |
ट्रॉफिक स्तर (संदर्भ 69278) |
2.6 ±0.28 se; based on food items. |
मछली पकड़ने की भेद्यता (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |