分类 / 名称 俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei > Galaxiiformes (Southern smelts) > Galaxiidae (Galaxiids) > Galaxiinae
Etymology: Galaxias: Greek, galaxias, ou = a kind of fish (Ref. 45335).
More on author: Castelnau.
Etymology: Galaxias: Greek, galaxias, ou = a kind of fish (Ref. 45335).
More on author: Castelnau.
Taxonomic Remarks
The high level of genetic divergence between most of the populations in South Africa suggests that it may represent a species complex rather than a single species (Ref. 32965, 93589). There is an urgent need for detailed morphological diagnostic studies, and the determination of the ecological requirements and conservation status of each of the cryptic forms of this species (Ref. 93589).
环境：氛围 / 气候带 / 深度上下限 / 分布范围 生态学
; 淡水 底中水层性. 亞熱帶的; 18°C - 24°C (Ref. 12468); 30°S - 34°S
分布 领土 | FAO区域 | 生态系 | 标本纪录 | 分布图 | 简介 | Faunafri
Africa: endemic to South Africa, occurs in Cape coastal streams and rivers from the Krom and upper Gamtoos River systems (south coast) to the Clanwilliam Olifants system (west coast)(Ref. 32965, 52193, 93589, 93786).
非洲: 岬海岸的溪流與河川從 Keurbooms(南部海岸) 到克蘭威廉象河系統 (西岸) ，南非。
非洲: 岬海岸的溪流與河川從 Keurbooms(南部海岸) 到克蘭威廉象河系統 (西岸) ，南非。
首次成熟时的长度 / 大小 / 重量 / 年龄
简单描述 检索表 | 型态特徵 | 形态测量图
背棘 (总数) : 0; 背的软条 (总数) : 9 - 13; 臀棘: 0; 臀鳍软条: 9 - 14; 脊椎骨: 36 - 42. Diagnosis: body slender and cylindrical, without scales; dorsal fin placed far back over anal fin; caudal fin truncated; mouth terminal, jaws with teeth; large eyes; internal organs visible in live specimens (Ref. 52193). Loss of two laterosensory pores beneath the lower jaw; elongate caudal peduncle (Ref. 93822).
Body shape (shape guide): elongated; Cross section: oval.
Body shape (shape guide): elongated; Cross section: oval.
Facultative air-breathing in the genus (Ref. 126274); May penetrate some distance inland and is widespread in lakes and rivers (Ref. 3563), which may be either acid (pH 5-6,5) or alkaline (pH 8-9) (Ref. 93592, 93822). Prefers gentle currents within shelter of banks near the head of pools (Ref. 3563, 52193). Small but extremely hardy, they are known to tolerate a wide range of water and temperature conditions (Ref. 5214, 6164, 52193, 93591, 93592). Feeds on small drifting invertebrates (Ref. 7248, 52193). Spawning period occurs in spring up to middle of summer (Ref. 5214, 33843, 52193), depending on the conditions (Ref. 52193). Ripe eggs are demersal, relatively large and numbering about 30-40 (Ref. 93592). Their small size and cryptic color enable them to avoid predators (Ref. 52193).
大部份在海岸而低地的区域中生存在内陆但是可能贯透一些距离; 在湖与河中广泛分布。 (参考文献 3563) 偏爱在头水池附近的浅堆的温和庇护所里面的水流。 小的但是非常强韧, 被知道容忍宽范围的水与温度环境。 它的体型小与善于隐藏的颜色使它能够避开掠食者。 吃小的漂流无脊椎动物。 (参考文献 7248)
大部份在海岸而低地的区域中生存在内陆但是可能贯透一些距离; 在湖与河中广泛分布。 (参考文献 3563) 偏爱在头水池附近的浅堆的温和庇护所里面的水流。 小的但是非常强韧, 被知道容忍宽范围的水与温度环境。 它的体型小与善于隐藏的颜色使它能够避开掠食者。 吃小的漂流无脊椎动物。 (参考文献 7248)
生命周期和交配行为 成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
Breeding occurs in spring or summer depending on local conditions (Ref. 52193). Galaxias zebratus does not migrate to the sea for breeding purposes (Ref. 41543, 93592).非洲: 岬海岸的溪流與河川從 Keurbooms(南部海岸) 到克蘭威廉象河系統 (西岸) ，南非。
主要参考文献
上传您的参考资料 | 参考文献 | 合作者 : Berra, Tim M. | 合作者
Skelton, P.H., 2001. A complete guide to the freshwater fishes of southern Africa. Cape Town (South Africa): Struik Publishers, 395 p. (Ref. 52193)
CITES
Not Evaluated
对人类的威胁
无害处的
人类利用
渔业: 没有兴趣; 水族馆: 商业性
FAO - Publication: search | FishSource |
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基于模型的估算
|
系统发育多样性指数 (参考文献 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
| Bayesian length-weight | a=0.00490 (0.00205 - 0.01170), b=3.12 (2.91 - 3.33), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
|
营养阶层 (参考文献 69278) |
3.5 ±0.37 se; based on food items. |
|
回复力 (参考文献 120179) |
低的, 最小族群倍增时间4.5 - 14 年 (Fec<50). |
|
渔业脆弱性 (Ref. 59153) |
Low vulnerability (12 of 100). 🛈 |