迈氏兵鲶 · Rusty Cory
概要
| 字段 | 值 |
|---|---|
| 类别 | 鱼 |
| 学名 | Osteogaster rabauti |
| 别名 | 黑躯兵鲶、邁氏兵鯰、黑軀兵鯰、Corydoras myersi、Corydoras rabauti |
| 分类 | 鲶形目 Siluriformes › 美鲶科 Callichthyidae › Osteogaster |
| 水体 | 淡水 |
| 原产地 | 巴西、哥伦比亚、秘鲁 |
| 成体体长 | 6.5 cm |
| 饲养难度 | 入门 |
| 最小水体 | 81 L |
| 最小缸长 | 90 cm |
| 群居方式 | 群游 |
| 性情 | 温和 |
| 外部数据 | seriouslyfish osteogaster-rabauti;fishbase 12195 |
| 繁殖方式 | 附着产卵 |
| 特征 | 无鳞/细鳞: 是 |
水质参数
| 参数 | 耐受范围 | 最适范围 | 单位 |
|---|---|---|---|
| 水温 | 20–27 | — | °C |
| pH | 5.5–7.2 | — | — |
| 总硬度 | 1–12 | — | dGH |
概述
迈氏兵鲶（Osteogaster rabauti）是温和、群居的甲鲶，常见旧称为 Corydoras rabauti。它与近似种容易混淆：体背侧的宽暗带在尾柄处向腹侧延伸，是识别时的重要观察点。
分布与栖息地
多数记录来自巴西与秘鲁边界一带的 Javari 河流域，靠近巴西、秘鲁和哥伦比亚三国交界区。哥伦比亚也可能有分布，但完整范围仍不清楚。采集记录提示它可能生活于洪泛湖、牛轭湖及河流环境。
饲养环境
底面积至少约 90 × 30 cm。细沙最合适，保持非常洁净的圆滑砾石也能使用。其他布景可以灵活安排，但应提供一定遮蔽，让鱼有安全感。
食性与喂食
可提供沉底配合饵，搭配红虫、水蚯蚓等小型活饵或冻饵，保持多样化。应给它们专门分配食物，不能只靠其他鱼的残饵，也不能指望它们代替清洁底床。
习性与混养
性情温和，至少以 4～6 条的群体饲养，让它们保持自然的群体活动。
雌雄区分
雌鱼通常较大，性成熟后身体比雄鱼明显更宽、更厚。
繁殖
可每雌配两条或更多雄鱼。雌鱼明显抱卵后，以较凉水进行约 50%～70% 的换水，并增加供氧、水流，必要时重复刺激。卵可贴在缸壁、细叶植物间或沉水产卵拖把中，拖把便于整体移走卵。
产后分开亲鱼与卵。转移的卵使用相同缸水，保持充足供氧并管理霉卵。约 3～4 天孵化，卵黄完全吸收后可喂微虫、丰年虾无节幼体等小型活饵。鱼苗养大并不轻松，需要极佳水质；薄层沙底似乎比裸底更有利于减少健康问题。
补充说明
与 Osteogaster zygata 相比，本种的暗带会延伸到尾柄下部，后者在尾柄只保留背侧暗纹。贸易中偶尔也有白化类型。
身体具有骨板，偶尔上浮吞空气属于辅助呼吸行为。胸鳍硬刺能造成疼痛刺伤，搬运时避免手抓硬刺；刺基部腺体分泌物可能带轻微毒性，这一点仍带推测性。
图片
图片来自 SeriouslyFish,版权归各摄影者所有。
用药风险
按有效成分禁忌与本物种特征自动判断;物种特征未知时不会命中,不代表安全。
English
Overview
Osteogaster rabauti, often encountered under the older name Corydoras rabauti, is a peaceful schooling armored catfish. Identification deserves attention: the broad upper-body stripe continues onto the lower part of the tail base, unlike that of a close look-alike.
Distribution & habitat
Most records come from the Javari drainage along the Brazil–Peru border near the three-country frontier with Colombia. A Colombian occurrence is possible, but the full range remains unclear. Collection information suggests floodplain lakes, oxbows, and river habitats.
Aquarium setup
Provide a footprint of at least approximately 90 × 30 cm. Fine sand is preferable, although smooth gravel can work if kept exceptionally clean. Furnishings are flexible, but include cover to provide security.
Diet & feeding
Offer sinking prepared foods alongside small live or frozen items such as bloodworms and Tubifex. Variety and direct access to food matter. The fish should neither depend on other inhabitants' leftovers nor be expected to clean the aquarium.
Behaviour & compatibility
Maintain this mild, social species in a group of at least four to six individuals.
Sexual dimorphism
Females generally grow larger. Mature females are distinctly broader and deeper through the body than males.
Breeding
Use two or more males per female where possible. When females are visibly full of eggs, a cooler water change of around 50–70% with increased aeration and flow can encourage spawning; stimulation may need repeating. Eggs attach to glass, fine vegetation, or submerged spawning mops. Mops simplify removal of the clutch.
Separate eggs and adults after spawning. A hatching container should use the same water with ample oxygenation and management of fungal losses. Hatching usually takes about 3–4 days. Once yolk reserves are exhausted, the fry accept microworms and Artemia nauplii. Rearing requires excellent water quality, and a thin sand covering appears to reduce health problems compared with a bare floor.
Notes
In the similar Osteogaster zygata, the dark stripe remains on the upper tail base rather than extending downward. An albino form of this species is occasionally sold.
Bony plates cover the body, and occasional surface gulps supplement aquatic respiration. Handle carefully around the sharp pectoral spines, which can inflict painful punctures. Mild toxicity of secretions near the spine bases has been suggested but remains uncertain.
来源
- https://www.seriouslyfish.com/species/osteogaster-rabauti(抓取于 2026-10-10)
osteogaster-rabauti · 文件: data/species/osteogaster-rabauti.md · 状态: 草稿