分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Eupercaria/misc (Various families in series Eupercaria)
鱸形目 (Various families in series Eupercaria) >
Lethrinidae (Emperors or scavengers)
裸頰鯛科 (Emperors or scavengers) > Monotaxinae
Etymology: Gymnocranius: Greek, gymnos = naked + Greek, kranion = skull (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
生態學
海洋 底中水層性; 深度上下限 10 - 35 m (Ref. 101097). ; 22°S - 23°S, 166°E - 167°E
分布
國家 | FAO區域 | 生態系 | 發現紀錄 | Point map | 簡介 | Faunafri
Pacific Ocean: New Caledonia (Ref. 84158).
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 35.8 cm SL 雄魚/尚未辨別雌雄; (Ref. 84158)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
A species of Lethrinidae with the following combination of characters: four rows of scales on cheek; 10 soft rays in dorsal fin; ten soft rays in anal fin; body oblong (hence the species epithet) and fusiform, ratio of standard length to body depth between 2.6 and 2.8, increasing with size; dorsal and ventral profiles almost similarly convex; tip of snout only slightly below axis of body; snout slightly rounded; tail elongated with rounded tips; posterior part of jaws reaching to about level of nostril; pored scales on lateral line: 48; scales between middle portion of spinous dorsal fin and lateral line: six. Lower edge of eye slightly (in the smaller individuals examined) to well above a line from tip of snout to middle of caudal fin fork; horizontal or sub-horizontal wavy blue lines or dashes on lower part of snout and on cheeks; pale blue speckles more or less visible on operculum. The lines or dashes become dark red or brown against paler background in preserved specimens; they do not extend up to the upper part of snout and their number slightly increases with size. Forehead, snout and upper lip of fresh specimens can be bright yellow, matched by similar yellow colouration of margin of operculum; loosely defined vertical dark bar crossing the eye; on fresh animals, dorsal, pectoral, anal and caudal fins drab, brownish or yellowish, with reddish to vermilion edges. Each lower jaw has a raw of three small, slender canines on each side of one large canine at front, and a lateral row of eight to 10 conical teeth; numerous villiform teeth form a brush behind the front canines; each upper jaw has a front row of six to 10 small, slender canines followed by four to five conical teeth and a patch of villiform teeth.
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Borsa, P., P. Béarez and W.-J. Chen, 2010. Gymnocranius oblongus, a new large-eye bream species from New Caledonia (Teleostei: Lethrinidae). C. R. Biologies 333:241-247. (Ref. 84158)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-1)
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5010 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01698 (0.00734 - 0.03932), b=2.98 (2.79 - 3.17), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.4 ±0.6 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 中等的, 族群倍增時間最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (34 of 100).
