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> Blenniiformes (Blennies) > Tripterygiidae (Triplefin blennies) > Tripterygiinae
Etymology: Helcogramma:Greek, helkos, -eos, -ous = ulcer, sore + Greek, gramma = letter, mark (Ref. 45335); nigra:The specific epithet is from the Latin nigra meaning black. The name refers to the black fins of the males.
Environment: milieu / climate zone / depth range / distribution range Ecología
marino bentopelágico; rango de profundidad 1 - 14 m (Ref. 52308). Tropical
Western Central Pacific: Papua New Guinea, Vanuatu, and Fiji.
Tamaño / Peso / Age
Maturity: Lm? range ? - ? cm Max length : 3.8 cm TL macho / no sexado; (Ref. 90102)
Short description Claves de identificación | Morfología | Morfometría
Espinas dorsales (total) : 16 - 17; Radios blandos dorsales (total) : 11 - 13; Espinas anales: 1; Radios blandos anales: 19 - 21; Vértebra: 36 - 38. A species of Helcogramma (sensu Hansen, 1986) with 1-2 symphysial mandibular sensory pores, second dorsal fin spines XIII (two of 26 specimens with XIV), third dorsal fin segmented rays 10-12, last ribs on vertebral centrum 11, vertebrae modally 11+26=37 (value range: 11+25 to 27=36 to 38), pored lateral line scales modally 25 (value range: 23-29), nape scales absent, males with dorsal, caudal and anal fins dark.
Adults inhabit exposed rocky and coralline boulders of coasts (Ref. 90102). 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). Minimum depth from Ref. 58018.
Life cycle and mating behavior Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva
Williams, J.T. and J.C. Howe, 2003. Seven new species of the triplefin fish genus Helcogramma (Tripterygiidae) from the Indo-Pacific. aqua, J. Ichthyol. Aquat. Biol. 7(4):151-176. (Ref. 52308)
IUCN Red List Status (Ref. 130435: Version 2024-2)
Trophic ecology componentes alimenticios Composición de la dieta consumo de alimento Food rations Despredadores
Ecology Ecología
Population dynamics Coeficiente del crecimiento para Max. ages / sizes Length-weight rel. Length-length rel. Length-frequencies Mass conversion Reclutamiento Abundancia
Life cycle Reproducción Madurez Maturity/Gills rel. Fecundidad Puesta Spawning aggregations Huevos Egg development Larva Dinámica larvaria
Physiology Body composition Nutrients Consumo del oxígeno Tipo de natación Velocidad de natación Visual pigments Fish sound Diseases & Parasites Toxicity (LC50s)
Genetics Genética Heterozygosity heritabilidad
Human related Aquaculture systems Perfiles de acuicultura Razas Ciguatera cases Stamps, coins, misc.
Preferred temperature (Ref. 123201): 25.5 - 29.4, mean 28.4 °C (based on 964 cells).
Phylogenetic diversity index (Ref. 82804): PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00617 (0.00288 - 0.01322), b=3.04 (2.86 - 3.22), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Nivel trófico (Ref. 69278): 3.0 ±0.3 se; based on size and trophs of closest relatives
Resiliencia (Ref. 120179): Alto, población duplicada en un tiempo mínimo inferior a 15 meses (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).
