Actinopterygii (strålfeniga fiskar) >
Perciformes (Perch-likes) >
Rachycentridae (Cobia)
Etymology: Rachycentron: Greek, rhachis, -ios = spine + Greek, kentron = sting (Ref. 45335).
Miljö / Klimat / Range
Ekologi
; marina; brackvatten revassocierade; havsvandrande (Ref. 51243); djupintervall 0 - 1200 m (Ref. 9739). Subtropical; 17°C - 32°C (Ref. 12459), preferred 27°C (Ref. 107945); 47°N - 37°S, 98°W - 166°E (Ref. 12459)
Worldwide in tropical and subtropical waters, but absent in the eastern Pacific (Ref. 9739, 33390) and the Pacific Plate, except marginally (Ref. 10948). Western Atlantic: Canada (Ref. 5951) to Bermuda and Massachusetts, USA to Argentina (Ref. 7251), including the Gulf of Mexico (Ref. 9626) and entire Caribbean (Ref. 26938). Eastern Atlantic: Morocco to South Africa. Indo-West Pacific: East Africa (Ref. 2871, 5213, 6644, 30573) and Hokkaido, Japan to Australia.
Length at first maturity / Size / Vikt / Age
Maturity: Lm ?, range 43 - ? cm
Max length : 200 cm TL hane/ej könsbestämd; (Ref. 10790); common length : 110 cm TL hane/ej könsbestämd; (Ref. 3487); publicerad maxvikt: 68.0 kg (Ref. 7251); rapporterad maxålder: 15 år (Ref. 9739)
Taggstrålar i ryggfenan (totalt): 7 - 9; Mjukstrålar i ryggfenan (totalt): 26-33; Taggstrålar i analfenan 2-3; Mjukstrålar i analfenan: 22 - 28. Head broad and depressed. First dorsal fin with short but strong isolated spines, not connected by a membrane. Caudal fin lunate in adults, upper lobe longer than lower. Back and sides dark brown, with 2 sharply defined narrow silvery bands.
Adults occur in a variety of habitats, over mud, sand and gravel bottoms; over coral reefs, off rocky shores (Ref. 10948) and in mangrove sloughs; inshore around pilings and buoys, and offshore around drifting and stationary objects; occasionally in estuaries (Ref. 9739). Form small groups and may pursue small pelagic inshore (Ref. 48635). Feed on crabs, fishes, and squids (Ref. 5213, 10948, 13442). Form spawning aggregations during the warm months in the western Atlantic; eggs and larvae planktonic (Ref. 12459). Caught in small quantities due to its solitary behavior (Ref. 9626). Good food fish; marketed fresh (Ref. 5284), smoked, and frozen (Ref. 9987). Also caught for sport (Ref. 26938).
Form spawning aggregations during the warm months in the western Atlantic; eggs and larvae planktonic (Ref. 12459).
Shaffer, R.V. and E.L. Nakamura, 1989. Synopsis of biological data on the cobia Rachycentron canadum (Pisces: Rachycentridae). NOAA Tech. Rep. NMFS 82, FAO Fisheries Synopsis 153. (Ref. 9739)
IUCN Red List Status (Ref. 115185)
CITES (Ref. 94142)
Not Evaluated
Threat to humans
Harmless
Human uses
Fiskeri: mindre kommeriell; Vattenbruk: kommersiell; sportfisk: ja
Verktyg
Special reports
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Estimates of some properties based on models
Phylogenetic diversity index (Ref.
82805): PD
50 = 1.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00457 (0.00317 - 0.00660), b=3.15 (3.05 - 3.25), in cm Total Length, based on LWR estimates for this species (Ref.
93245).
Trofisk nivå (Ref.
69278): 4.0 ±0.0 se; Based on diet studies.
Resiliens (Ref.
69278): Låg, lägsta populationsfördubblingstid 4,5-14 år (K=0.09-0.22; tm=2-3; tmax=15).
Prior r = 0.59, 2 SD range = 0.35 - 0.99, log(r) = -0.53, SD log(r) = 0.26, Based on: 1 M, 9 K, 2 tgen, 2 tmax, 2 Fec records
Vulnerability (Ref.
59153): Moderate vulnerability (44 of 100) .
