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Teleostei (teleosts) > Beryciformes (Sawbellies) > Melamphaidae (Bigscale fishes or ridgeheads)
Etymology: Sio: Acronym of Scripps Institute of Oceanography (Ref. 45335).
Eponymy: SIO is the official abbreviation of the Scripps Institution of Oceanography, California. Dr Nils Otto Gustaf Nordenskjöld (1869–1928) was a Finnish-Swedish geologist, geographer and polar explorer. [...] (Ref. 128868), visit book page.
More on author: Lönnberg.

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

Marine; bathypelagic; depth range 200 - 3000 m (Ref. 51657). Deep-water; 20°S - 68°S

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

Atlantic, Indian and Pacific: south of 20°S. A single specimen was recorded from the Eastern Central Pacific (Ref. 5189). Record from the North Pacific (Moss, 1962) is in error (Ref. 51657).

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 12.3 cm SL male/unsexed; (Ref. 5189)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 3; Dorsal soft rays (total): 9; Anal spines: 1; Anal soft rays: 8 - 9.

Trawled below 200 m (Ref. 4241). Young are found in warmer and more northern waters.

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

Main reference Upload your references | References | Coordinator | Collaborators

Gon, O., 1990. Melamphaidae. p. 218-221. In O. Gon and P.C. Heemstra (eds.) Fishes of the Southern Ocean. J.L.B. Smith Institute of Ichthyology, Grahamstown, South Africa. (Ref. 5189)

IUCN Red List Status (Ref. 130435: Version 2024-1)

Least Concern (LC) ; Date assessed: 09 October 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: minor commercial

FAO - Publication: search | FishSource |

More information

Trophic ecology
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Internet sources

Estimates based on models

Preferred temperature (Ref. 123201): 2.1 - 7.9, mean 4.1 °C (based on 682 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01072 (0.00442 - 0.02595), b=3.10 (2.89 - 3.31), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.5 ±0.4 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): Low, minimum population doubling time 4.5 - 14 years (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

Price category (Ref. 80766): Unknown.

Sio nordenskjoldii (Lönnberg, 1905)