Namibia country information

Common names: Atlantischer Sägebauch, Orange roughy
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: commercial | Ref: Bianchi, G., K.E. Carpenter, J.-P. Roux, F.J. Molloy, D. Boyer and H.J. Boyer, 1999
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Ranges from Walvis Bay southward (Ref. 4181). A target species in deep-water fishery; caught in bottom trawls targeting dense aggregations (Ref. 36731). Initial catches above 12,000 t per year, but subsequently reduced considerably (Ref. 36731). Also Ref. 3583, 6390, 27121, 36694, 54854.
National Checklist:
Country Information: httpss://www.cia.gov/library/publications/resources/the-world-factbook/geos/wa.html
National Fisheries Authority: https://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:

Classification / Names

Actinopterygii (ray-finned fishes) > Beryciformes (Sawbellies) > Trachichthyidae (Slimeheads)
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL

Common names from other countries

Большеголов атлантический (=берикс исландский), Hoplostète orange, Reloj anaranjado, ... more

Main reference

Maul, G.E. 1986. (Ref. 4784)
References | Biblio | Coordinator : Moore, Jon A. | Collaborators

Size / Weight / Age

Max length : 75.0 cm TL male/unsexed; (Ref. 36696); common length : 40.0 cm TL male/unsexed; (Ref. 4181); max. published weight: 7.0 kg (Ref. 36697); max. reported age: 149 years (Ref. 3680)

Length at first maturity
L_m 37.0, range 18 - 32.5 cm

Environment

Marine; bathypelagic; oceanodromous (Ref. 51243); depth range 180 - 1809 m (Ref. 6390), usually 400 - 900 m (Ref. 3583)

Climate / Range

Deep-water; 3°C - 9°C (Ref. 36694), preferred 19°C (Ref. 107945); 65°N - 56°S, 84°W - 168°W

Distribution

Western Atlantic: Gulf of Maine (Ref. 4784) [in error according to Moore (Fishes of the Gulf of Maine, in press), should be off northern Nova Scotia]. Eastern Atlantic: Iceland to Morocco; Walvis Bay, Namibia to off Durban, South Africa. Indo-Pacific: south-central Indian Ocean and New Zealand. Eastern Pacific: Chile (Ref. 27363). Several stocks may exist as suggested by distinct spawning sites and seasons.
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 4 - 6; Dorsal soft rays (total): 15-19; Anal spines: 3; Anal soft rays: 10 - 12. Bright brick-red in color, mouth and gill cavity bluish black (Ref. 4181). Ventral scutes: 19-25.

Inhabits deep, cold waters over steep continental slopes, ocean ridges and sea-mounts. Shallow range of usual occurrence from Ref. 27121. Appears to be dispersed over both rough bottoms and steep, rough grounds where it feeds on crustaceans and fish. In New Zealand, the main prey include mesopelagic and benthopelagic prawns, fish, and squid, with other organisms such as mysids, amphipods and euphausiids occasionally being important (Ref. 9072). Juveniles feed mainly on crustaceans (Ref. 27075, 27076). Grows very slowly and is one of the longest lived fish species known. Based on parasite and trace-element analyses, orange roughy is a sedentary species with little movement between fish-management zones (Ref. 27089). Little is known of the larvae and juveniles which are probably confined to deep water (Ref. 27088). The fishery targets sporadically formed dense spawning and non-spawning aggregations. Marketed fresh and frozen; eaten steamed, fried, microwaved and baked (Ref. 9988). Because of severe overfishing the species has been listed as threatened by the Australian Government in 2006.

IUCN Red List Status (Ref. 115185)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: highly commercial

More information

Countries
FAO areas
Ecosystems
Occurrences
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Ecology
Diet
Food items
Food consumption
Ration

Common names
Synonyms
Metabolism
Predators
Ecotoxicology
Reproduction
Maturity
Spawning
Fecundity
Eggs
Egg development

Age/Size
Growth
Length-weight
Length-length
Length-frequencies
Morphometrics
Morphology
Larvae
Larval dynamics
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References
Aquaculture
Aquaculture profile
Strains
Genetics
Allele frequencies
Heritability
Diseases
Processing
Mass conversion

Collaborators
Pictures
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Ciguatera
Speed
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Otoliths
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Tools

Special reports

Check for Aquarium maintenance | Check for Species Fact Sheets | Check for Aquaculture Fact Sheets

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Summary page | Point data | Common names | Photos

Internet sources

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805)
PD₅₀ = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Trophic Level (Ref. 69278)
4.3 ±0.1 se; Based on diet studies.

Resilience (Ref. 69278)
Very Low, minimum population doubling time more than 14 years (K=0.04-0.06; tm=5-33; tmax=140; Fec=10,000)

Vulnerability (Ref. 59153)
High to very high vulnerability (73 of 100)

Price category (Ref. 80766)
Medium

Hoplostethus atlanticus Collett, 1889