分類 / Names
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Acanthuriformes (Surgeonfishes) >
Acanthuridae (Surgeonfishes, tangs, unicornfishes) > Acanthurinae
Etymology: Acanthurus: Greek, akantha = thorn + Greek, oura = tail (Ref. 45335).
More on author: Poey.
Issue
Sister species: Acanthurus bahianus (Ref. 087362).
Environment: milieu / climate zone / depth range / distribution range
生態学
海 関連する礁; 深さの範囲 11 - 45 m (Ref. 3194). Tropical; 21°C - 25°C (Ref. 27115); 44°N - 7°N, 98°W - 59°W (Ref. 87362)
Northwest to West Central Atlantic: from Massachusetts and Bermuda to Trinidad and Tobago, including the Gulf of Mexico and the islands of the Caribbean.
Length at first maturity / サイズ / 重さ / 年齢
Maturity: Lm 15.5, range 9 - ? cm
Max length : 38.1 cm SL オス/雌雄の選別がない; (Ref. 9761); common length : 25.0 cm TL オス/雌雄の選別がない; (Ref. 3142); 最大記録サイズ: 31 年 (Ref. 52229)
背面の脊椎 (合計) : 9; 背鰭 (合計) : 23 - 26; 肛門の骨: 3; 臀鰭: 21 - 23. This species is distinguished by the following set of characters: D IX, 23-26; A III, 21-23; pectoral rays 15-17; gill rakers 18-24; covered with very small ctenoid scales; spatulate teeth have denticulate edges, upper jaw with 14, lower jaw 16; body depth about 2.0 in standard length; caudal fin lunate, concavity of caudal fin 5.0-12.0 in SL, more concave in adults; length of caudal spine 3.0-3.5 in SL; eye diameter 3.0-3.5 in head length; colour of body yellowish to grayish brown, without dark vertical bars; yellow lines radiating from the posterior margin of eye; translucent pectoral fin with yellow tints; white or pale spot at the base of caudal fin; posterior margin of caudal, anal and dorsal fins have light blue or white margin (Ref. 87362)..
Inhabits shallow bottoms with coral or rocky formations (Ref. 13628); also found around inshore rocky areas with patches of sand, feeding primarily on benthic algae and occasionally grazing on seagrass beds (Ref. 87362). Usually occurs in groups of five or more individuals. Mainly diurnal species. The spine on both sides of the caudal peduncle may inflict painful wounds (Ref. 5217). Marketed fresh. Minimum depth reported from Ref. 27115. Previously reported longevity of 31 years from Ref. 52229 refers to Acanthurus bahianus, a case of misidentification.
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Bernal, M.A. and L.A. Rocha, 2011. Acanthurus tractus Poey, 1860, a valid western Atlantic species of surgeonfish (Teleostei, Acanthuridae), distinct from Acanthurus bahianus Castelnau, 1855. Zootaxa 2905:63-68. (Ref. 87362)
IUCNのレッドリストの状況は (Ref. 130435: Version 2024-1)
人間に対する脅威
Traumatogenic (Ref. 5217)
Human uses
水産業: 少数商業の; 水族館・水槽: 商業; 餌: occasionally
用具
特記事項
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インターネットの情報源
Estimates based on models
Preferred temperature (Ref.
123201): 22.9 - 28, mean 26.6 °C (based on 426 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01950 (0.01251 - 0.03039), b=2.91 (2.79 - 3.03), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
栄養段階 (Ref.
69278): 2.0 ±0.0 se; based on diet studies.
Generation time: 2.9 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
回復力 (Ref.
120179): 非常に低い, １４年以上の倍増期間の最小個体群 (K=0.3-1.5; tmax=31).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (32 of 100).
Nutrients (Ref.
124155): Calcium = 68.2 [28.9, 210.9] mg/100g; Iron = 0.941 [0.346, 2.417] mg/100g; Protein = 18.4 [17.1, 19.6] %; Omega3 = 0.104 [0.046, 0.227] g/100g; Selenium = 25.2 [8.4, 78.0] μg/100g; VitaminA = 20.9 [4.8, 91.9] μg/100g; Zinc = 2.8 [0.9, 5.2] mg/100g (wet weight);
