Classification / Names
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Blenniiformes (Blennies) >
Tripterygiidae (Triplefin blennies) > Tripterygiinae
Etymology: Helcogramma: Greek, helkos, -eos, -ous = ulcer, sore + Greek, gramma = letter, mark (Ref. 45335); williamsi: Named for Jeffrey T. Williams, Smithsonian Institution, National Museum of Natural History..
Environment: milieu / climate zone / depth range / distribution range
Οικολογία
Θαλασσινό(ά) βενθοπελαγικό; εύρος βάθους 1 - 3 m (Ref. 94457). Subtropical
Κατανομή
Χώρες | Περιοχές FAO | Οικοσυστήματα | Παρουσίες | Point map | Εισαγωγές | Faunafri
Western Pacific: widespread.
Μέγεθος / Βάρος / Age
Maturity: Lm ? range ? - ? cm
Max length : 2.9 cm SL αρσενικό/απροσδιόριστο; (Ref. 94457); 2.9 cm SL (female)
Short description
Κλείδες προσδιορισμού | Μορφολογία | Μορφομετρία
Ραχιαίες άκανθες (συνολικά) : 16 - 17; Μαλακές ραχιαίες ακτίνες (συνολικά) : 10 - 11; Εδρικές άκανθες: 1; Μαλακές εδρικές ακτίνες: 19 - 20; Σπόνδυλοι: 36. This species is distinguished by the following characters:Second dorsal-fin spines XIII; third dorsal-fin rays modally 11; anal-fin rays modally 19; lateral line with 22-24 pored scales; pattern of dentary pores modally 5+1+5; nape naked; supraorbital cirrus lobate; nasal cirrus broad, serrated or palmate; first dorsal fin lower in height than second; males with yellow mark from anterior tip of upper lip to anterior margin of eye and a whitish blue line extending from corner of mouth onto preopercle; trunk without longitudinal stripes; symphyseal dentary pores 1; upper lip without proboscis-like extension.
Adults are found in rocky shore areas with sand channels at depths of 1-3 m (Ref. 94457). 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).
Life cycle and mating behavior
Maturities | Αναπαραγωγή | Spawnings | Egg(s) | Fecundities | Προνύμφες
Chiang, M.-C. and I.-S. Chen, 2012. A new species of the genus Helcogramma (Blenniiformes, Tripterygiidae) from Taiwan. ZooKeys 216: 57-72. (Ref. 94457)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Εργαλεία
Special reports
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Διαδικτυακές πηγές
Estimates based on models
Phylogenetic diversity index (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).
Τροφικό Επίπεδο (Ref.
69278): 3.0 ±0.3 se; based on size and trophs of closest relatives
Ελαστικότητα (Ref.
120179): Υψηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού < 15 μήνες (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
