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Scombriformes (Mackerels) >
Gempylidae (Snake mackerels)
Etymology: Tongaichthys: From the Tonga island in the Pacific ocean + Greek, ichthys = fish.
Environment: milieu / climate zone / depth range / distribution range
البيئة
بحري مياه عميقة; نطاق العمق 288 - 312 m (Ref. 6181). Deep-water; 12°S - 27°S, 144°E - 174°W (Ref. 6181)
Pacific Ocean: Several specimens (38 individuals) were reported from the Tonga Ridge; around Fiji; 1 specimen from off Flinders Reef, Queensland (17°33'S, 149°46'E, CSIRO no. H1185-01).
الحجم / وزن / العمر
Maturity: Lm ?  range ? - ? cm
Max length : 30.0 cm SL ذكر/ مختلط الجنس; (Ref. 9784)
الأشواك الظهرية (المجموع) : 16 - 17; الأشعة الظهرية الناعمة (المجموع) : 14 - 17; شوكة شرجية: 1; أشعه شرجية لينه: 14 - 16; فقرات: 33. Head relatively large. Scales on cheeks enlarged, elongate and slightly overlapping. Color is dark brown above, slightly paler below.
Probably mesopelagic or mesobenthopelagic (Ref. 6181).
Life cycle and mating behavior
النضج | التكاثر | وضع البيض | بيض | الخصوبة | Larvae
Nakamura, I. and N.V. Parin, 1993. FAO Species Catalogue. Vol. 15. Snake mackerels and cutlassfishes of the world (families Gempylidae and Trichiuridae). An annotated and illustrated catalogue of the snake mackerels, snoeks, escolars, gemfishes, sackfishes, domine, oilfish, cutlassfishes,. scabbardfishes, hairtails, and frostfishes known to date. FAO Fish. Synop. 125(15):136 p. (Ref. 6181)
IUCN Red List Status (Ref. 130435: Version 2024-2)
استخدامات بشرية
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مصادر علي الأنترنت
Estimates based on models
Preferred temperature (Ref.
123201): 4.6 - 9.4, mean 6.1 °C (based on 78 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01023 (0.00426 - 0.02456), b=3.00 (2.79 - 3.21), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
مستوى غذائي (Ref.
69278): 3.9 ±0.6 se; based on size and trophs of closest relatives
المرونه (Ref.
120179): وسيط, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 1.4-4.4 سنة (Assuming tmax>3).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (27 of 100).