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Blenniiformes (Blennies) >
Tripterygiidae (Triplefin blennies) > Tripterygiinae
Etymology: Helcogramma: Greek, helkos, -eos, -ous = ulcer, sore + Greek, gramma = letter, mark (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Ecologie
marien demersaal; diepte 0 - 10 m (Ref. 6211). Tropical
Western Indian Ocean: Sri Lanka; possibly also in nearby areas.
Grootte / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 3.2 cm SL mannelijk / geslacht onbekend; (Ref. 6211)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale stekels (totaal) : 16 - 17; Dorsale zachte stralen (totaal) : 9 - 11; Anale stekels: 1; Anale zachte stralen: 17 - 20; Wervels: 35 - 36. Diagnosis: Dorsal fin III + XIII+ 10-11, second fin twice height of first in males (Comoro Is.); anal fin I + 19-20; pectoral rays 16 (2+7+7); pelvic fin I, 2, spine short and hidden, segmented rays simple, partially united by membrane. Vertebrae 10 + 25-26. LL total lateral scales 38-39, pored series 19-25 (121) scales, terminates at caudal fin base; nape with scales, bases of caudal and anterior of anal fin scaleless. Mandibular pores 2-3+1+2-3. Head length 3.4 in SL; eye 2.8; maxilla 2.2 in HL. Body with 5 H-shaped bars; dorsal, anal and caudal fins pigmented with spots or stripes. Live color not known but in alcohol females and juveniles are paler than males (Ref. 75031).
Adults live on rock surfaces and under ledges; common at depths less than 10 m (Ref. 6211). Eggs are hemispherical and covered with numerous sticky threads that anchor them in the algae on the nesting sites (Ref. 240). Larvae are planktonic which occur primarily in shallow, nearshore waters (Ref. 94114).
Levenscyclus en paargedrag
Maturities | Voortplanting | Spawnings | Egg(s) | Fecundities | Larven
Hansen, P.E.H., 1986. Revision of the tripterygiid fish genus Helcogramma, including descriptions of four new species. Bull. Mar. Sci. 38(2):313-354. (Ref. 6211)
Status op de Rode Lijst van het IUCN (Ref. 130435)
Gevaar voor de mens
Harmless
Gebruik door de mens
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Estimates based on models
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00562 (0.00258 - 0.01228), b=3.08 (2.89 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 3.0 ±0.3 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref.
120179): Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
