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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.
Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied
Ecologie
marien demersaal; diepte 45 - 60 m (Ref. 9772). Tropical
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.
Grootte / Gewicht / Leeftijd
Maturiteit: Lm ?  range ? - ? cm
Max length : 14.0 cm SL mannelijk / geslacht onbekend; (Ref. 9772); common length : 11.0 cm SL mannelijk / geslacht onbekend; (Ref. 9772)
Dorsale stekels (totaal) : 11 - 12; Dorsale zachte stralen (totaal) : 29 - 34; Anale stekels: 2; Anale zachte stralen: 7.
Body shape (shape guide): fusiform / normal.
Inhabits coastal waters (Ref. 9772). Minimum depth from Ref. 58018.
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
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)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))
Gevaar voor de mens
Harmless
Gebruik door de mens
Visserij: van minder commercieel belang
Tools
Speciale rapporten
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Internetbronnen
Schattingen op basis van modellen
Fylogenetische diversiteitsindex (Ref. 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00891 (0.00408 - 0.01946), b=3.07 (2.90 - 3.24), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245). |
Trofisch niveau (Ref. 69278) |
3.4 ±0.4 se; based on size and trophs of closest relatives |
Weerstandsvermogen (Ref. 120179) |
Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (Preliminary K or Fecundity.). |
Kwetsbaarheid van de visserij (Ref. 59153) |
Low vulnerability (15 of 100). 🛈 |
Prijsklasse (Ref. 80766) |
Medium.
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