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> Atheriniformes (Silversides) > Bedotiidae (Madagascar rainbowfishes)
Etymology: Rheocles:Greek, rheos = stream + Greek, kles, kleis = straits; derhami:Named for Patrick de Rham, director of the Aquatic Conservation Network (Ref. 39832). Eponymy: Dr Patrick Henri de Rham (d: 1936) is a Swiss zoologist, botanist, ichthyologist and aquarist in Lausanne, and was Expert Ecologist to the Coopération Technique Suisse. He is a Director of the Aquatic Conservation Network. (Also see Patrick and Rham) (Ref. 128868), visit book page.
ေက်ာဆူးေတာင္ (စုစုေပါင္း) : 2; ေက်ာဘက္တြင္ရွိေသာ ေရယက္၌ပါေသာ အမွ်င္မ်ား (စုစုေပါင္း) : 14 - 19; စအိုတြင္ရွိေသာဆူးေတာင္မ်ား: 1; စအိုနားတြင္ရွိျပီး နူးညံ့ေသာေရယက္အမွ်င္မ်ား: 15 - 21; ေက်ာရိုးမ်ား: 35 - 38. Rheocles derhami is readily distinguished from R. sikorae and R. wrightae by length of upper jaw (32-41%HL versus 46-58) and absence of black pigmentation of genital papilla, from R. pellegrini by number of gill rakers on lower limb of first arch (9-10 versus 6-7), from R. lateralis by caudal peduncle length (67.3-78.6%SL versus 84.6-96.7), and from R. alaotrensis by absence of chest and belly scales and paired predorsal scale rows (Ref. 39832). In life males normally light grey, the second dorsal, anal and caudal fins are bright silvery blue, the throat region is orange-red, light grey females are not brightly colored; preserved specimens are creamy yellow, scale rows in dorsal midline heavily pigmented and darkened (Ref. 39832). Body shape (shape guide): fusiform / normal.
Stiassny, M.L.J. and D.M. Rodriguez, 2001. Rheocles derhami, a new species of freshwater rainbowfish (Atherinomorpha: Bedotiidae) from the Ambomboa River in northeastern Madagascar. Ichthyol. Explor. Freshwat. 12(2):97-104. (Ref. 39832)
စိုးရိမ္ဖြယ္အေျခအေနသို႔ေရာက္ရွိေန ေသာမ်ိဳးသုဥ္းရွားပါးေတာ့မည့္မ်ိဳးစိတ္မ်ား၏အဆင့္အတန္း (Ref. 130435: Version 2025-2 (Global))
Phylogenetic diversity အညွှန်းကိန်း (က်မ္းကိုးစာရင္း 82804): PD50 = 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01122 (0.00514 - 0.02450), b=3.04 (2.87 - 3.21), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).
အစာရရွိမႈကြင္းဆက္နွင့္ အစာစားေသာအေလ့အက်င့္ (က်မ္းကိုးစာရင္း 69278): 3.2 ±0.40 se; based on food items.
ငါးဖမ်းခြင်း အားနည်းချက် (Ref. 59153): Low vulnerability (10 of 100). 🛈
