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Oncorhynchus kawamurae Jordan & McGregor, 1925

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drawing shows typical species in Salmonidae.

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Teleostei > Salmoniformes (Salmons) 鮭形目 (Salmons) > Salmonidae (Salmonids) 鮭科 (Salmonids) > Salmoninae
Etymology: Oncorhynchus: Greek, onyx, -ychos = nail + Greek, rhyngchos = snout (Ref. 45335).
More on authors: Jordan & McGregor.

Environment: milieu / climate zone / depth range / distribution range 生態學

; 淡水 底中水層性; 深度上下限 38 - 180 m (Ref. 87053), usually 90 - ? m (Ref. 87053). 4°C - 13°C (Ref. 87053)

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Asia: endemic to Lake Tazawa in Akita Prefecture, Japan. Believed to have become extinct since 1940. Recently discovered in 2010 from Lake Saiko, Yamanashi Prefecture, one of the lakes where eyed eggs of this species were introduced in 1935.

大小 / 重量 / 年齡

Maturity: Lm ?  range ? - ? cm
Max length : 23.3 cm SL 雄魚/尚未辨別雌雄; (Ref. 87053)

簡短描述 檢索表 | 型態特徵 | 形態測量圖

Presence of 47-62 pyloric caeca and 37-43 gill rakes (Ref. 87053).

生物學特性     字彙 (例如 epibenthic)

Probably feeds on mesopelagic or benthopelagic zooplankton (Ref. 87053)

Life cycle and mating behavior Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔魚


主要參考資料 Upload your references | 參考文獻 | 合作者 | 合作者

Nakabo, T., K. Nakayama, N. Muto and M. Miyazawa, 2011. Oncorhynchus kawamurae "Kunimasu," a deepwater trout, discovered in Lake Saiko, 70 years after extinction in the original habitat, Lake Tazawa, Japan. Ichthyol. Res. 58(2):180-183. (Ref. 87053)

IUCN 瀕危狀態 (Ref. 130435)

  野外滅絕 (EW) ; Date assessed: 07 December 2017

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01047 (0.00482 - 0.02276), b=3.04 (2.87 - 3.21), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).
營養階層 (Ref. 69278):  3.6   ±0.4 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 (18 of 100).