分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Alepocephaliformes (Slickheads and tubeshoulders.)
胡瓜魚目 (Slickheads and tubeshoulders.) >
Alepocephalidae (Slickheads)
黑頭魚科 (Slickheads)
Etymology: euryops: From the big eyes of the species..
Environment: milieu / climate zone / depth range / distribution range
生態學
海洋 深海區的; 深度上下限 622 - 1412 m (Ref. 36330). 深水域
Western Central Pacific: Sulu Sea.
中西太平洋: 蘇路海。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 23.4 cm SL 雄魚/尚未辨別雌雄; (Ref. 36330)
簡短描述
型態特徵 | 形態測量圖
背的軟條 (總數): 17-21; 臀鰭軟條: 14 - 18. Body shallow, maximum depth reaching 20%SL. Caudal peduncle relatively long (usually >18%SL). Vertical fin bases against each other. Head not very deep, moderately wide (postorbital width 11-12.5%SL). Snout very short but not blunt; its length 1.5-2.3 times smaller than orbit diameter; olfactory bulbs relatively large; ethymoid in olfactory bulb region relatively narrow. Eyes very large; orbit > 30% HL; no aggregations of light connective tissue in the orbit area around the eyeball; interorbital gap very narrow and < half the orbit diameter. Lacrimal not deep, significantly smaller than lens diameter, slightly overlapping maxillare. Seismosensory canals on head not extended, their pores not enlarged. No separate suprapreoperculum at the upper end of the praeoperculum; preopercular canal connects to the postorbital canal by means of a skin tube. Upper edge of upper jaw overlaps with the vertical of the rear edge of the lens, it may reach the vertical of the back edge of the orbit in large specimens. Supramaxilla 2; front one relatively long; its length equal or shorter than upper outgrowth of the posterior one. Photophores present on the head: a row of 4-5 infraorbitalias; 1 behind back edge of the orbit at its middle level; 5 on both sides along the lower jaw seismosensory canals; 2-4 along the upper 3 rays of the gill membrane; 1 each on the operculum, interoperculum, and between orbit and olfactory capsule. Photophores on body, situated above and below the lateral line, the size increases in the vertical direction that the largest ones cover the lower profile of the body; in front of the vertical fins; 3 rows in the caudal region; several irregular rows of small ones on the gill membranes. Pyloric caeca < 10 (Ref. 36330).
身體水淺又最大的深度達到 20% SL。 尾柄相當長的.(通常 >18% SL) 倚靠彼此的垂直鰭基底。 頭部不是非常深, 寬度中等的 (眼眶後的寬度 11-12.5% SL). 吻非常短的但是不是鈍; 它的長度 1.5-2.3 倍於眼窩直徑; 嗅球相當大的; 在嗅球區域中的篩骨相當狹窄的。 眼非常大的; 眼窩 >30% HL; 在眼窩的淡連接著組織的沒有群集環繞著眼球的區域; 眼間骨間隙非常狹窄的與 < 一半的眼窩直徑。 淚骨不是深, 重要地比晶狀體直徑更小, 些微部分重疊的上頜骨。 在不被延伸的頭部上的感覺管, 他們的孔不增大了。 在前鰓蓋的上端的沒有個別的前上鰓蓋; 前鰓蓋骨管經由皮膚管連接到眶後管。 上頜的上緣與晶狀體的後緣的垂直者部分重疊, 它可能在大的個體中聯絡眼窩的背部邊緣的垂直者。 上頜骨 2; 在前面的一相當長的; 它的長度等於或後面那個的短於上面自然的發展。 發光器位於頭部之上: 一列 4-5 眶下骨; 在它的中央水平的眼窩的 1個在後背面邊緣; 5 在兩邊上沿著下頜感覺管; 2-4 沿著鰓薄膜的上面 3個鰭條; 1 每個在鰓蓋，間鰓蓋骨上, 與在眼窩與鼻囊之間。 在身體上的發光器, 位於以下上面了側線, 大小最大的一些覆蓋身體的下面輪廓的垂直方向的增加; 在垂直的鰭之前; 在尾鰭區域中的 3 列; 在鰓膜上的一些不規則的較小列。 幽門盲囊 <10.(參考文獻 36330)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
中西太平洋: 蘇路海。
Sazonov, Y.I., 1999. A new species of the genus Rouleina (Argentiniformes, Alepocephalidae) from the Philippine Archipelago Seas and a redescription of R. livida and R. nuda. J. Ichthyol. 39(7):479-487. (Ref. 36330)
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Estimates based on models
Preferred temperature (Ref.
123201): 5.4 - 10.1, mean 6.1 °C (based on 113 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5010 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.5 ±0.5 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 vulnerability (19 of 100).
