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Teleostei (teleosts) > Eupercaria/misc (Various families in series Eupercaria) > Sciaenidae (Drums or croakers)
Eponymy: Rev Dr Christoph Samuel John (1747–1813) was a botanist and herpetologist and a medical missionary (1771–1813) at the Danish trading station of Tranquebar (now Tharangambadi), Tamil Nadu, not far from Madras (Chennai). [...] (Ref. 128868), visit book page.

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

Marine; demersal; depth range 45 - 60 m (Ref. 9772). Tropical

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Indo-West Pacific: along the coasts of Australia and Papua New Guinea, from about 124° to 144°E. Record from Java and Sumatra is more likely referable to other related species.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 14.0 cm SL male/unsexed; (Ref. 9772); common length : 11.0 cm SL male/unsexed; (Ref. 9772)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 11 - 12; Dorsal soft rays (total): 29 - 34; Anal spines: 2; Anal soft rays: 7.

Inhabits coastal waters (Ref. 9772). Minimum depth from Ref. 58018.

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Sasaki, K. and P.J. Kailola, 1991. Johnius (Johnius) laevis, a new sciaenid from northern Australia and Papua New Guinea. Jap. J. Ichthyol. 38(2):119-123. (Ref. 9225)

IUCN Red List Status (Ref. 130435: Version 2024-1)

Data deficient (DD) ; Date assessed: 03 October 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: minor commercial

FAO - Publication: search | FishSource |

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Estimates based on models

Preferred temperature (Ref. 123201): 24.4 - 28.3, mean 27.3 °C (based on 43 cells).

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

Bayesian length-weight: a=0.00891 (0.00412 - 0.01928), b=3.08 (2.91 - 3.25), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.4 ±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 (10 of 100).

Price category (Ref. 80766): Medium.

Johnius laevis Sasaki & Kailola, 1991