颈鲶
概要
| 字段 | 值 |
|---|---|
| 类别 | 鱼 |
| 学名 | Trachelyichthys decaradiatus |
| 别名 | 頸鯰 |
| 分类 | 鲶形目 Siluriformes › 项鳍鲶科 Auchenipteridae › Trachelyichthys |
| 水体 | 淡水 |
| 成体体长 | 8 cm |
| 饲养难度 | 入门 |
| 最小水体 | 68 L |
| 最小缸长 | 60 cm |
| 外部数据 | seriouslyfish trachelyichthys-decaradiatus;fishbase 47680 |
| 原产地 | 圭亚那鲁普努尼河 |
| 性情 | 温和 |
水质参数
| 参数 | 耐受范围 | 最适范围 | 单位 |
|---|---|---|---|
| 水温 | 20–28 | — | °C |
| pH | 6.5–7 | — | — |
| 总硬度 | 8–15 | — | dGH |
概述
颈鲶（Trachelyichthys decaradiatus）是温和的小型鲶鱼，与许多同科鱼不同，通常白天也会进食。它适合有同种伙伴、植物掩护和柔和照明的缸，不必为了符合“鲶鱼夜行”的印象而只在深夜投喂。
分布与栖息地
目前仅知于圭亚那鲁普努尼河，生活在河道及其支流。
饲养环境
底面积至少约 60 × 38 cm。密植水草有助于呈现体色，但应在植被间保留游动空间。它不喜欢过亮环境，可用浮水植物柔化照明，而不是把全缸塞满、失去泳道。
食性与喂食
偏爱红虫、蚯蚓、虾肉等活饵和冷冻饵，多数个体也能吃小颗粒或薄片。通常在白天就会进食，应观察它是否实际抢得到食物。
习性与混养
对同种没有攻击性，群养更合适。可搭配体形适当、性情温和的小型鱼，不过极小鱼苗仍有被吃的风险，不能将其作为安全的育苗缸伙伴。
雌雄区分
雄鱼臀鳍显著改造，用于交接，功能近似卵胎生鱼的交接器。抱卵雌鱼腹部更圆，但这种雄性结构本身不能证明本种为卵胎生。
繁殖
缸内繁殖尚无确认报道，不能把相近物种的成功经验直接当成本种流程。
补充说明
与细颈鲶（Trachelyichthys exilis）非常相似，本种眼位相对更靠后，鳃盖后方延伸的肩突更短、更宽。两者在贸易中都不常见，鉴别时需要同时比较这些结构。
图片
图片来自 SeriouslyFish,版权归各摄影者所有。
English
Overview
Trachelyichthys decaradiatus is a peaceful small catfish that normally feeds during daylight, unlike many members of its family. It benefits from conspecific company, planted cover, and softened lighting. Feeding need not be restricted to nighttime simply because it is a catfish.
Distribution & habitat
Known records are limited to Guyana's Rupununi River and its tributaries.
Aquarium setup
Provide a base around 60 × 38 cm. Dense planting suits it and supports good color, but leave open passages for swimming. Floating plants can diffuse strong light without filling every available swimming space.
Diet & feeding
Live and frozen foods such as bloodworms, earthworms, and prawn are favored. Most individuals also accept small pellets or flakes. Daytime feeding is usual, but check that the fish actually obtains food among its companions.
Behaviour & compatibility
It shows no aggression toward conspecifics and is more comfortable in a group. Suitable companions are small, peaceful fishes of appropriate size. Extremely tiny fry remain vulnerable, so this is not an automatically safe addition to a nursery aquarium.
Sexual dimorphism
The male anal fin is strongly modified for mating, with a role comparable to a livebearer's gonopodium. Females become rounder when carrying eggs. That male structure alone does not establish livebearing as the reproductive mode.
Breeding
Confirmed aquarium reproduction is unreported. Success with a related fish should not be presented as a proven procedure for this species.
Notes
It closely resembles Trachelyichthys exilis, but the eye sits farther back and the humeral projection behind the gill cover is shorter and broader. Both are uncommon in the hobby, and these structural differences should be considered together when identifying them.
来源
ID:trachelyichthys-decaradiatus · 文件: data/species/trachelyichthys-decaradiatus.md · 状态: 草稿