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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.
More on author: Peters.
Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
marina; brackvatten bottenlevande. Tropical
Western Indian Ocean: Kenya to South Africa and Madagascar. Previously referred to as Johnius dussumieri, which is restricted from Pakistan east to the Andaman Islands.
Längd vid första mognad / Storlek / Vikt / Ålder
Könsmognad: Lm 13.0  range ? - ? cm
Max length : 40.0 cm TL hane/ej könsbestämd; (Ref. 4336); common length : 20.0 cm TL hane/ej könsbestämd; (Ref. 3490)
Livscykel och parningsbeteende
Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver
Sasaki, K., 1997. Resurrection of two East African species of Johnius (Perciformes, Sciaenidae). Ichthyol. Res. 44(3):311-315. (Ref. 13679)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
Hot mot människor
Harmless
Mänskliga användningsområden
Fiskeri: mindre kommeriell; sportfisk: ja
Verktyg
Särskilda rapporter
Ladda ner XML
Internet-källor
Uppskattningar baserade på modeller
Index för fylogenetisk mångfald (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=0.01148 (0.00674 - 0.01956), b=3.08 (2.94 - 3.22), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245). |
Trofisk nivå (Ref. 69278) |
3.5 ±0.4 se; based on size and trophs of closest relatives |
Resiliens (Ref. 120179) |
Mellan, lägsta populationsfördubblingstid 1,4-4,4 år (Preliminary K or Fecundity.). |
Sårbarhet i fisket (Ref. 59153) |
Low to moderate vulnerability (31 of 100). 🛈 |
Priskategori (Ref. 80766) |
Medium.
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