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Istiophoridae - - Classification -
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Tetrapturus georgii Lowe, 1841
Roundscale spearfish
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| Native range | All suitable habitat | Point map | Year 2050 |
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| This map was computer-generated and has not yet been reviewed. |
| Tetrapturus georgii AquaMaps Data sources: GBIF OBIS |
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Tetrapturus georgii
Picture by FAO
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Common names from other countries
Classification / Names आम नाम | उपशब्द | Catalog of Fishes(वर्ग, प्रजाति) | ITIS | CoL | WoRMS | Cloffa
> Carangiformes (Jacks) > Istiophoridae (Billfishes)
Etymology: Tetrapturus: Greek, tetra = four + Greek, pteron, fin, wing (Ref. 45335).
Eponymy: George Butler Leacock supplied Lowe with the spearfish holotype and “…rendered valuable assistance to the cause of ichthyology of this island [Madeira]… …generally as well as in this instance. [...] (Ref. 128868), visit book page.
More on author: Lowe.
Etymology: Tetrapturus: Greek, tetra = four + Greek, pteron, fin, wing (Ref. 45335).
Eponymy: George Butler Leacock supplied Lowe with the spearfish holotype and “…rendered valuable assistance to the cause of ichthyology of this island [Madeira]… …generally as well as in this instance. [...] (Ref. 128868), visit book page.
More on author: Lowe.
Environment: milieu / climate zone / depth range / distribution range पारिस्थितिकी
समुद्री; औशिनोड़िरोमस (Ref. 51243); गहराई सीमा 0 - 200 m (Ref. 43). Subtropical; 42°N - 29°S, 98°W - 18°E (Ref. 43)
वितरण देश | ऐफ ऐ ओ क्षेत्र | Ecosystems | संयोग | Point map | भूमिका | Faunafri
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.
आकार / वज़न / Age
Maturity: Lm ? range ? - ? cm
Max length : 184 cm FL पुल्लिंग / अलिंग; (Ref. 43); 181.0 cm FL (female); अधिकतम प्रकाशित वज़न: 21.5 kg (Ref. 43); अधिकतम प्रकाशित वज़न: 21.5 kg
Max length : 184 cm FL पुल्लिंग / अलिंग; (Ref. 43); 181.0 cm FL (female); अधिकतम प्रकाशित वज़न: 21.5 kg (Ref. 43); अधिकतम प्रकाशित वज़न: 21.5 kg
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 परिपक्व अवधि | पुनरुत्पत्ति | मछलीऔ का अंडे देना | अंडे | Fecundity | लार्वा
Main reference
Upload your references | संदर्भ | संयोजक | सहयोगीयो
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 Red List Status (Ref. 130435: Version 2024-1)
Data deficient (DD) ; Date assessed: 15 November 2021
Threat to humans
Harmless
Human uses
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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 (0.00195 - 0.01025), b=3.14 (2.94 - 3.34), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278): 4.3 ±0.4 se; based on size and trophs of closest relatives
लौटाव (Ref. 120179): ऊंचा, न्यूनतम जनसंख्या दुगनी समय अवलागत 15 महीने। (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153): Very high vulnerability (90 of 100).