分類 / 名前
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Beloniformes (Needle fishes) >
Adrianichthyidae (Ricefishes) > Oryziinae
Etymology: Oryzias: Greek, oryza = rice; because of the habitat used by this fish (Ref. 45335); sakaizumii: Named for Dr. Mitsuru Sakaizumi, a molecular geneticist at Niigata University, who pioneered in and contributed to the field of molecular phylogenetic study of Japanese ricefishes.
Eponymy: Dr Mitsuru Sakaizumi is a zoologist and molecular geneticist who heads a lab in the Faculty of Science, Niigata University, Japan. [...] (Ref. 128868), visit book page.
環境：環境 / 気候帯 / 深さの範囲 / 分布範囲
生態学
; 新鮮な水 外洋の. Tropical; 36°N - 35°N, 136°E - 137°E
Asia: freshwaters along the Sea of Japan coast in the northern half of Honshu, from the Pacific coast of Momoishi, Aomori Pref. to Hyogo Pref. around Tango, Tajima district that distributional western limit is Hamasaka.
サイズ / 重さ / 年齢
成熟: Lm ? range ? - ? cm
Max length : 3.7 cm SL オス/雌雄の選別がない; (Ref. 89067)
簡単な記述
検索表 | 形態学 | 形態計測学
Oryzias sakaizumii is distinguished from all other congeners including O. latipes that are distributed throughout east Asia by the following combination of characters: distribution of melanophores, dense network of melanophores along each scale margin on the body surface in both sexes; depth of notch in membrane between dorsal-fin rays 5 and 6 less than half the length of rays in males; distinctive irregular black spots on the posterior portion of body lateral; and several silvery scales in patches on the posterior portion of the body (Ref. 89067).
Body shape (shape guide): elongated.
Occurs in ponds, marshes, and streams, such as irrigation canals amid paddy fields in flat alluvial lowlands. Well adapted to aquatic life on temporary floodplain wetlands (Ref. 89067).
ライフサイクルと交尾行動
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Asai, T., H. Senou and K. Hosoya, 2012. Oryzias sakaizumii, a new ricefish from northern Japan (Teleostei: Adrianichthyidae). Ichthyol. Explor. Freshwat. 22(4):289-299. (Ref. 89067)
IUCNのレッドリストの状況は (Ref. 130435: Version 2025-2 (Global))
人間の用途
水産業: 興味がない
用具
特記事項
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インターネットの情報源
モデルに基づく推定値
系統多様性指数 (参照
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00479 (0.00190 - 0.01207), b=3.13 (2.91 - 3.35), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
栄養段階 (参照
69278): 3.4 ±0.4 se; based on size and trophs of closest relatives
漁業の脆弱性 (Ref.
59153): Low vulnerability (10 of 100).
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