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Hoplostethus atlanticus, Orange roughy : fisheries
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Orange roughy
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Hoplostethus atlanticus
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Orlov, A.
Teleostei (teleosts) >
Trachichthyiformes
(Roughies) >
Trachichthyidae
(Slimeheads)
Etymology:
Hoplostethus:
Greek, hoplon = weapon + Greek, stetho, stethion = brest; literal = to prick a little breast (Ref.
45335
)
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; bathypelagic; oceanodromous (Ref.
51243
); depth range 180 - 1809 m (Ref.
6390
), usually 400 - 900 m (Ref.
3583
). Deep-water; 3°C - 9°C (Ref.
36694
); 65°N - 56°S, 84°W - 168°W
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.
Length at first maturity / Size / Weight / Age
Maturity: L
m
34.5
, range 18 - 32.5 cm
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
)
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.
Orange roughy are synchronous annual spawners (Ref.
7030
). They form dense spawning aggregations over sea hills and slopes. Eggs and sperms are shed into the water at the same time. Individual males appear to spawn over a 1-2 week period and females spawn for up to 1 week. Little is known of the larvae and juveniles.
Maul, G.E.
, 1986. Trachichthyidae. p. 749-752. In P.J.P. Whitehead, M.-L. Bauchot, J.-C. Hureau, J. Nielsen and E. Tortonese (eds.) Fishes of the north-eastern Atlantic and the Mediterranean. UNESCO, Paris. Vol. 2. (Ref.
4784
)
IUCN Red List Status (Ref.
130435
)
Not Evaluated
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: highly commercial
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Estimates based on models
Preferred temperature (Ref.
123201
): 3.5 - 8.4, mean 6.6 °C (based on 754 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02239 (0.01607 - 0.03118), b=3.08 (2.98 - 3.18), in cm total length, based on LWR estimates for this species (Ref.
93245
).
Trophic level (Ref.
69278
): 4.3 ±0.1 se; based on diet studies.
Resilience (Ref.
120179
): Very Low, minimum population doubling time more than 14 years (K=0.04-0.06; tm=5-33; tmax=140; Fec=10,000).
Prior r = 0.06, 95% CL = 0.04 - 0.10, Based on 3 stock assessments.
Fishing Vulnerability (Ref.
59153
): High to very high vulnerability (72 of 100).
Climate Vulnerability (Ref.
125649
): Moderate to high vulnerability (54 of 100).
Price category (Ref.
80766
):
Medium
.
Nutrients (Ref.
124155
): Calcium = 12.4 [4.3, 62.9] mg/100g; Iron = 0.266 [0.095, 0.925] mg/100g; Protein = 17.5 [15.8, 19.2] %; Omega3 = 0.16 [0.05, 0.53] g/100g; Selenium = 20.4 [6.3, 69.4] μg/100g; VitaminA = 26.7 [2.7, 276.6] μg/100g; Zinc = 0.379 [0.183, 0.821] mg/100g (wet weight);
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