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Tetrapturus georgii Lowe, 1841

Roundscale spearfish
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Tetrapturus georgii   AquaMaps   Data sources: GBIF OBIS
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Tetrapturus georgii
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Common names from other countries

分類 / Names 共通名の | 類義語 | Catalog of Fishes(部類, ) | ITIS | CoL | WoRMS | Cloffa

> Carangiformes (Jacks) > Istiophoridae (Billfishes)
Etymology: Tetrapturus: Greek, tetra = four + Greek, pteron, fin, wing (Ref. 45335).
  More on author: Lowe.

Environment: milieu / climate zone / depth range / distribution range 生態学

; 海洋回遊性 (Ref. 51243); 深さの範囲 0 - 200 m (Ref. 43).   Subtropical; 42°N - 29°S, 98°W - 18°E (Ref. 43)

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Eastern Atlantic and Mediterranean Sea: Positively known only from Madeira, Sicily (Italy), Strait of Gibraltar, and the adjacent Atlantic Ocean off southern Portugal. Can be expected to range widely in the eastern and perhaps central North Atlantic. Central and eastern Atlantic records from Japanese longliner's data need clarification. Highly migratory species.

サイズ / 重さ / 年齢

Maturity: Lm ?  range ? - ? cm
Max length : 184 cm FL オス/雌雄の選別がない; (Ref. 43); 181.0 cm FL (female); 最大公表体重: 21.5 kg (Ref. 43); 最大公表体重: 21.5 kg

生物学     用語集 (例 epibenthic)

Further study is strongly needed to clarify the validity of this species. Probably oceanic. Length has been transferred from 'Body length' to FL (* 0.15).

Life cycle and mating behavior Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 幼生

主な参考文献 Upload your references | 参考文献 | コーディネーター | 協力者

Nakamura, I., 1985. FAO species catalogue. Vol. 5. Billfishes of the world. An annotated and illustrated catalogue of marlins, sailfishes, spearfishes and swordfishes known to date. FAO Fish. Synop. 125(5):65p. Rome: FAO. (Ref. 43)

IUCNのレッドリストの状況は (Ref. 130435)

  欠足データ (DD) ; Date assessed: 15 November 2021

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

  Harmless




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Estimates based on models

Preferred temperature (Ref. 115969): 14.3 - 19.1, mean 17.1 (based on 37 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5630   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00447 (0.00193 - 0.01034), b=3.14 (2.94 - 3.34), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
栄養段階 (Ref. 69278):  4.3   ±0.4 se; based on size and trophs of closest relatives
回復力 (Ref. 120179):  高い, 15か月以下の倍増期間の最小個体群 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Very high vulnerability (90 of 100).