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Atheriniformes (Silversides) >
Melanotaeniidae (Rainbowfishes, blue eyes)
Etymology: Melanotaenia: Greek, melan, -anos = black + latin, taenia = stripe (Ref. 45335); aruensis: Named for its tye locality, Aru Islands.
Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied
Ecologie
; zoet water benthopelagisch; pH range: 8.0 - ?. Tropical; 27°C - ? (Ref. 110723)
Asia: Trangan Island and Kobroor Island in Aru Islands, Indonesia.
Grootte / Gewicht / Leeftijd
Maturiteit: Lm ? range ? - ? cm
Max length : 7.6 cm SL mannelijk / geslacht onbekend; (Ref. 110723); 6.9 cm SL (female)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale stekels (totaal) : 5 - 7; Dorsale zachte stralen (totaal) : 10 - 13; Anale stekels: 1; Anale zachte stralen: 20 - 23. Melanotaenia aruensis is distinguished by the following combination of characters: V to VII-I,10-13 dorsal-fin rays; I,20-23 anal-fin rays; 14-15 pectoral-fin rays; 34-36 scales on lateral line, 15-18 predorsal scales; 13-19 cheek scales; 17-18 total gill rakers on first arch; greatest body depth of adult male 35.1 % SL; least depth of caudal peduncle 9.5-11.1 % SL; colour in life grey-brown dorsally on head, nape, and adjacent anterodorsal portion of body; posterior two-thirds of upper half of body bluish grey with narrow bronze margin around each scale and bronze stripe between each horizontal scale row; dorsal and caudal fins semitranslucent grey, second dorsal fin with relatively broad whitish margin (Ref. 110723).
Body shape (shape guide): fusiform / normal.
The type locality on Trangan Island lies in a luxuriant rainforest on the downstream side of a spectacular 75 m-long limestone tunnel. The stream has about 10-12 m width, 0.5-2.0 m depth and relatively clear and slow-flowing water with a rocky limestone bottom and abundant cover mainly in the form of submerged fallen tree limbs. Another location on Kobroor Island where the species occurs is also lined by luxuriant forest and has 15-20 m width, 1-3 m depth, and clear and slow flowing water. The margins of the channel are composed of abundant, partially submerged
terrestrial plants, which offered abundant shelter for small fishes (Ref. 110723).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Allen, G.R., R.K. Hadiaty, P.J. Unmack and M.V. Erdmann, 2015. Rainbowfishes (Melanotaenia: Melanotaeniidae) of the Aru Islands, Indonesia with descriptions of five new species and redescription of M. patoti Weber and M. senckenbergianus Weber. aqua, Int. J. Ichthyol. 21(2):66-108. (Ref. 110723)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))
Gevaar voor de mens
Harmless
Gebruik door de mens
Visserij: van potentieel belang; Aquarium: Potentieel
Tools
Speciale rapporten
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Schattingen op basis van modellen
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5000 [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).
Trofisch niveau (Ref.
69278): 2.9 ±0.4 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref.
120179): Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (Preliminary K or Fecundity.).
Kwetsbaarheid van de visserij (Ref.
59153): Low vulnerability (10 of 100).
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