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Teleostei (teleosts) > Eupercaria/misc (Various families in series Eupercaria) > Sciaenidae (Drums or croakers)
Etymology:

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; benthopelagic; depth range 1 - 40 m (Ref. 9772). Tropical

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Western Pacific: Taiwan, Hong Kong, Shanghai and Singapore.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 22.0 cm SL male/unsexed; (Ref. 124713); common length : 14.0 cm SL male/unsexed; (Ref. 9772); max. published weight: 135.27 g (Ref. 124713)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 10 - 11; Dorsal soft rays (total): 24 - 27; Anal spines: 2; Anal soft rays: 7 - 8. Small species with a moderately elongate body. Dark mottled pattern dorsally, creamy white ventrally; scale pockets on dorsal side of head and body with broad, dark margins; spinous dorsal fin black, pectoral fins grey, pelvic fins pale (Ref. 9772).

Inhabits shallow coastal waters (Ref. 9772).

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Sasaki, K., 1992. Two new and two resurrected species of the sciaenid genus Johnius (Johnius) from the West Pacific. Jap. J. Ichthyol. 39(3):191-199. (Ref. 10084)

IUCN Red List Status (Ref. 130435)

Least Concern (LC) ; Date assessed: 14 February 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: minor commercial

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Estimates based on models

Preferred temperature (Ref. 123201): 24.7 - 29.1, mean 28.4 °C (based on 648 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00832 (0.00477 - 0.01449), b=3.10 (2.95 - 3.25), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.5 ±0.4 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Low vulnerability (17 of 100).

Price category (Ref. 80766): Medium.

Johnius trewavasae Sasaki, 1992