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Ophidiiformes (Cusk eels) >
Dinematichthyidae (Viviparous brotula)
Etymology: Didymothallus: Name from Greek 'didymos' for double or twofold and 'thallus' for branch in plants, referring to the two supporters of nearly equal length in the single pair of pseudoclaspers..
More on author: Günther.
Environment: milieu / climate zone / depth range / distribution range
Ecologie
marien rifbewoner. Tropical
Indo-West Pacific: Australia.
Grootte / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 5.1 cm SL mannelijk / geslacht onbekend; (Ref. 76869); 6.6 cm SL (female)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale zachte stralen (totaal) : 78 - 97; Anale zachte stralen: 57 - 73; Wervels: 40 - 45. This species is distinguished by the following characters: D 78-97; A 57-73, V in D 2.2-2.6; vertebrae 12-13+28-32=40-45; one (outer) pseudoclasper wing-shaped with 2 slender,
straight supporters, the posterior one is slightly longer and thicker than anterior one; straight penis; 4-6 rows of scales on upper part of cheek, 0-2 rows on lower part; anterior tip of otolith rounded, otolith with undivided long sulcus, its centre anterior of centre of otolith, not inclined, otolith length to height, 2.2-2.3, otolith length to sulcus length, 1.9-2.1 (Ref. 76869).
Common species found on shallow reefs (Ref. 34024). Most common in inshore and back reef environments, associated with crevices of silty coralline rock. Female specimens with unusually low numbers of large embryos, 1-3, usually 2). One female (3.2 cm SL) contained one embryo (1.4 cm SL in length) This is among the lowest degree of fecundity observed in tribe Dinematichthyini. (Ref. 76869).
Levenscyclus en paargedrag
Maturities | Voortplanting | Spawnings | Egg(s) | Fecundities | Larven
Schwarzhans, W. and P.R. Møller, 2007. Review of the Dinematichthyini (Teleostei: Bythitidae) of the Indo-west Pacific. Part III. Beaglichthys, Brosmolus, Monothrix and eight new genera with description of 20 new species. The Beagle, Records of the Museums and Art Galleries of the Northern Territory 23:29-110. (Ref. 76869)
Status op de Rode Lijst van het IUCN (Ref. 130435)
Gevaar voor de mens
Harmless
Gebruik door de mens
Visserij: van geen belang
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Estimates based on models
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5625 [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).
Trofisch niveau (Ref.
69278): 3.3 ±0.5 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
