Namibia country information

Common names: Kabeljou, Silver kob
Occurrence: native
Salinity: brackish
Abundance: | Ref:
Importance: of no interest | Ref: Okeyo, D.O., 2005
Aquaculture: | Ref:
Regulations: | Ref:
Uses: gamefish: yes;
Comments: Occurs mainly in the surf zone between Meob Bay (24°31'S, 14°36'E) and Cape Frio (18°00'S, 11°48'E), but more predominantly in the southern region; caught by rock-and-surf by anglers and by skiboat and linefish-boat fishermen (Ref. 33860).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/wa.html
National Fisheries Authority: http://www.benefit.org.na/
Occurrences: Occurrences Point map
Main Ref: Bianchi, G., K.E. Carpenter, J.-P. Roux, F.J. Molloy, D. Boyer and H.J. Boyer, 1999
National Database:

Common names from other countries

无味白姑鱼, Kabeljou, Silver kob, ... more

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Eupercaria/misc (Various families in series Eupercaria) > Sciaenidae (Drums or croakers)
Etymology: Argyrosomus: Greek, argyros = silvered, silver + Greek, soma = body (Ref. 45335); inodorus: Name from the Latin 'inodorus' meaning without smell (first suspected of being a different species because it lacked the strong brassy/metallic smell that is typical of A. japonicus found in South African waters..

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

Marine; brackish; benthopelagic; oceanodromous (Ref. 51243); depth range 1 - 100 m (Ref. 11025). Subtropical; 17°S - 38°S, 11°E - 29°E

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Southeast Atlantic: Namibia southwards around the Cape of Good Hope and northwards at least as far as the Kei River in South Africa.

Length at first maturity / Size / Weight / Age

Maturity: L_m 34.4 range ? - ? cm
Max length : 145 cm TL male/unsexed; (Ref. 11025); common length : 115 cm TL male/unsexed; (Ref. 11025); max. published weight: 36.3 kg (Ref. 11025)

Short description Morphology | Morphometrics

Dorsal spines (total): 11; Dorsal soft rays (total): 25-29; Anal spines: 2; Anal soft rays: 7 - 8; Vertebrae: 25. Swim bladder carrot-shaped with 31-42 arborescent appendages, the latero-anterior limb of appendages present throughout length of bladder; drumming muscles present only in males; urinary bladders rudimentary; sagitta elongate with pronounced bulge in posterior third of ventral margin; pectoral fin axillary fold naked; peritoneum unpigmented; anterior part of lateral line slightly curved.

Between the Kei River and Cape Agulhas, this species rarely enters estuaries or the surf zone, but becomes more abundant in the surf zone on the west coast of South Africa. Restricted to a depth of 1-20 m in Namibia, apparently due to anoxic conditions beyond this depth. Highly regarded as a table fish. Marketed mostly fresh, but sometimes frozen (Ref. 11025).

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

Main reference Upload your references | References | Coordinator | Collaborators

Griffiths, M.H. and P.C. Heemstra, 1995. A contribution to the taxonomy of the marine fish genus Argyrosomus (Perciformes: Sciaenidae), with descriptions of two new species from southern Africa. Ichthyol. Bull., J.L.B. Smith Inst. Ichthyol. No. 65, 40 p. (Ref. 11025)

IUCN Red List Status (Ref. 130435)

Vulnerable (VU) (A2bd); Date assessed: 09 November 2018

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: commercial; gamefish: yes

FAO(Publication : search) | FishSource |

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Internet sources

Estimates based on models

Preferred temperature (Ref. 115969): 13.9 - 21.7, mean 16.3 (based on 48 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00813 (0.00477 - 0.01384), b=3.07 (2.93 - 3.21), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).

Trophic level (Ref. 69278): 4.2 ±0.67 se; based on food items.

Resilience (Ref. 120179): Medium, minimum population doubling time 1.4 - 4.4 years (K=0.09-0.12; tm=1.3-2.4).

Prior r = 0.35, 95% CL = 0.23 - 0.52, Based on 2 stock assessments.

Fishing Vulnerability (Ref. 59153): High to very high vulnerability (68 of 100).

Price category (Ref. 80766): Medium.

Argyrosomus inodorus Griffiths & Heemstra, 1995