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Carangaria/misc (Various families in series Carangaria) >
Polynemidae (Threadfins)
Etymology: Polydactylus: Greek, poly = a lot of + greek, daktylos = finger (Ref. 45335).
More on author: Bleeker.
Environment: milieu / climate zone / depth range / distribution range
生態学
; 新鮮な水 底生の. Tropical
Asia: Kapuas River, Kalimantan and the Musi and Batanghari rivers, Sumatra, Indonesia.
サイズ / 重さ / 年齢
Maturity: Lm ?  range ? - ? cm
Max length : 52.0 cm TL オス/雌雄の選別がない; (Ref. 9685)
簡単な記述
形態学 | 形態計測学
背面の脊椎 (合計): 9; 背鰭 (合計): 13-14; 肛門の骨 3; 臀鰭: 11. Occipital profile concave in adults. Pectoral filaments 7 with 3 filaments extending beyond caudal fin base and the fifth extending beyond tip of caudal fin lobe. Long pectoral fin rays, 24-26% of SL (Ref. 40968, 41110).
Known only from three rivers on two Indonesian islands: Kapuas River, Kalimantan and Musi and Batanghari rivers, Sumatra. These rivers were part of one large river, the ancient Central or North Sunda River, on the Sundaland during the Pleistocene, the last cold period about 12,000 years ago. Geographic evidence indicates that the species was well adapted to the freshwater basins in this extensive Pleistocene river, whereas other Polydactylus species are generally marine. With Sundaland submerged to about 100 m, this species is now restricted to the 3 presently known localities. The longer pectoral filaments and a more slender body have been considered as an adaptation to its freshwater existence. The long pectoral filaments are useful as a sense organ to search for food in muddy waters (Ref. 40968). A food fish along the Kapuas River, Borneo (Ref. 9685).
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Motomura, H., 2004. Threadfins of the world (Family Polynemidae). An annotated and illustrated catalogue of polynemid species known to date. FAO Spec. Cat. Fish. Purp. Rome: FAO. 3:117 p. (Ref. 57343)
Human uses
水族館・水槽: 商業
より多くの情報
共通名の類義語代謝捕食動物生態毒性繁殖成熟放精卵の集合体生産力卵卵の開発
Age/Size成長体長-重さLength-length体長組成形態計測学形態学幼生幼生の動力補充豊度BRUVS
参考文献水産養殖水産養殖の紹介緊張遺伝子のElectrophoreses遺伝病気行列NutrientsMass conversion
協力者画像Stamps, Coins Misc.音シガテラ(食中毒の名前)速度泳ぐ 型式カマOtoliths脳視覚
用具
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インターネットの情報源
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01738 (0.00751 - 0.04023), b=3.05 (2.86 - 3.24), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
栄養段階 (Ref.
69278): 3.7 ±0.5 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 手段, 1.4年~4.4年の倍増期間の最小個体群 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (41 of 100).