分类 / Names
俗名 | 同种异名 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii 辐鳍鱼纲 (条鳍鱼)
(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.
Environment: milieu / climate zone / depth range / distribution range
; 淡水 大洋性. ; 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.
大小 / 重量 / 年龄
Maturity: Lm ?  range ? - ? cm
Max length : 3.7 cm SL 雄鱼/尚未辨别雌雄; (Ref. 89067)
型态特徵 | 形态测量图
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).
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).
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
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)
CITES (Ref. 118484)
合作者照片Stamps, Coins Misc.声音神经毒速度泳型鳃区Otoliths脑重体重比眼睛色素
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00479 (0.00185 - 0.01240), b=3.13 (2.90 - 3.36), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
营养阶层 (Ref. 69278
): 3.4 ±0.4 se; Based on size and trophs of closest relatives
回复力 (Ref. 120179
): 高度, 族群倍增时间少于 15个月 ().
脆弱性 (Ref. 59153
): Low vulnerability (10 of 100) .