Classificatie / Names
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Ovalentaria/misc (Various families in series Ovalentaria) >
Opistognathidae (Jawfishes)
Etymology: Opistognathus: Greek, opisthe = behind + Greek, gnathos = jaw (Ref. 45335); to the very elongate upper jaw of the type species of the genus, Opistognathus nigromarginatus (Ref. 128653); walkeri: Named for of Boyd W. Walker.
Eponymy: Professor Dr Boyd Wallace Walker (1917–2001) was an American fisheries biologist; ultimately Professor Emeritus of Zoology-Fisheries at the University of California, Los Angeles, where he worked for over three decades (1949–1980). [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Ecologie
marien demersaal; diepte 21 - 90 m (Ref. 75633). Tropical
Eastern Pacific: Gulf of California.
Grootte / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 11.7 cm SL mannelijk / geslacht onbekend; (Ref. 75633)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale stekels (totaal) : 11; Dorsale zachte stralen (totaal) : 12 - 13; Anale stekels: 3; Anale zachte stralen: 11 - 12; Wervels: 26. This is a large (10.2-11.7 cm SL), deep-bodied species with the following set of features: adults of both sexes with long maxilla, with flexible scimitar-shaped lamina, in males, extending beyond operculum; black inner lining of maxilla and adjacent membranes; D 12 or 13; A III; 21-26 gill rakers on lower limb of first arch; 54-55 pored lateral line scales; 16 caudal vertebrae (Ref. 75633).
Juvenile specimens collected by ichthyocide at 21-24 m, and adults by trawl at 80-90 m (Ref. 75633).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Bussing, W.A. and R.J. Lavenberg, 2003. Four new species of eastern tropical Pacific jawfishes (Opistognathus: Opistognathidae). Rev. Biol. Trop. 51(2):529-550. (Ref. 75633)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2024-2)
Gevaar voor de mens
Harmless
Gebruik door de mens
Tools
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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=0.00389 (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): 3.5 ±0.6 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
