拉氏假鳃鮰 · Bluefin Nothobranch
概要
| 字段 | 值 |
|---|---|
| 类别 | 鱼 |
| 学名 | Nothobranchius rachovii |
| 别名 | 拉氏假鰓鮰 |
| 分类 | 鳉形目 Cyprinodontiformes › 假鳃鳉科 Nothobranchiidae › Nothobranchius |
| 水体 | 淡水 |
| 原产地 | 莫桑比克 |
| 成体体长 | 5.5 cm |
| 饲养难度 | 中等 |
| 最小水体 | 41 L |
| 最小缸长 | 45 cm |
| 群居方式 | 成对 |
| 外部数据 | seriouslyfish nothobranchius-rachovii;fishbase 9868 |
| 食性 | 肉食 |
| 繁殖方式 | 附着产卵 |
| 寿命 | 0.5–1 年 |
水质参数
| 参数 | 耐受范围 | 最适范围 | 单位 |
|---|---|---|---|
| 水温 | 20–24 | — | °C |
| pH | 6–7.5 | — | — |
| 总硬度 | 3–10 | — | dGH |
概述
拉氏假鳃鮰（Nothobranchius rachovii）来自莫桑比克东部的季节性水域。旱季成鱼死亡，卵留在底床中等待雨季，是维持血系时必须考虑储卵周期的周年鳉。
分布与栖息地
狭义本种局限于莫桑比克东部蓬圭河下游与赞比西河流域之间，旧时更南、更北的一些种群已分作近似种。栖息低地泛滥平原的临时洼地、水池和沼泽，水位在旱季下降并完全干涸数月，部分环境有丰富水草。
饲养环境
一对日常饲养也应至少参考 45 × 30 厘米的底面积，短期繁殖隔离另论。泥炭不是成鱼饲养必需品，但常用于收集产卵。
食性与喂食
以微小动物为食，日常以水蚤、丰年虾及切碎红虫等小型活饵或冷冻饵为基础。
雌雄区分
雄鱼更大，色彩远较雌鱼鲜明。
繁殖
野外卵可在干涸底床中等待约五至六个月至降雨恢复。孵出的鱼苗成长迅速，约三周即可性成熟，水族箱内常见寿命约半年至一年。人工储卵通常约五至七个月后再湿水，孵化计划需预留这段较长周期。
补充说明
水族血系常附产地及采集年份编号，宜完整保留，避免不同种群杂交。某些老品系可能源自早年的输入，但不能仅凭相似色彩就认定同一来源。
图片
图片来自 SeriouslyFish,版权归各摄影者所有。
English
Overview
From seasonal waters of eastern Mozambique, Nothobranchius rachovii survives the dry season as eggs after the adults die. Maintaining a captive line therefore depends on planned egg storage and successive generations.
Distribution & habitat
Its restricted modern range lies between the lower Pungwe and Zambezi basins. Populations formerly included farther north and south are now treated separately. Temporary floodplain depressions, pools, and swamps dry for several months, with aquatic vegetation present at some sites.
Aquarium setup
For routine maintenance, even a pair should have at least a 45 by 30 cm footprint. Smaller spawning isolation is temporary. Peat is commonly used to collect eggs but is not essential for keeping adults.
Diet & feeding
A micropredator, it should receive small live and frozen animal foods, including Daphnia, Artemia, and chopped bloodworms.
Sexual dimorphism
Males are larger and much more colorful than females.
Breeding
Wild eggs wait in the substrate through roughly five to six dry months. Newly hatched fish grow quickly and may mature at about three weeks. Typical aquarium life spans are six to twelve months. Captive storage commonly lasts five to seven months before wetting, requiring advance planning for the next generation.
Notes
Keep locality and collection-year codes attached to each line to limit accidental crosses. A longstanding aquarium strain is thought to descend from an early import, but similar color does not establish shared origin.
来源
- https://www.seriouslyfish.com/species/nothobranchius-rachovii(抓取于 2026-10-10)
nothobranchius-rachovii · 文件: data/species/nothobranchius-rachovii.md · 状态: 草稿