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Galaxias zebratus (Castelnau, 1861)

Cape galaxias
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Galaxias zebratus
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分類 / Names 共通名の | 類義語 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

条鰭類 > Osmeriformes (Smelts) > Galaxiidae (Galaxiids) > Galaxiinae
Etymology: Galaxias: Greek, galaxias, ou = a kind of fish (Ref. 45335).  More on author: Castelnau.

Environment: milieu / climate zone / depth range / distribution range 生態学

; 新鮮な水 底生の漂泳性.   Subtropical; 18°C - 24°C (Ref. 12468); 30°S - 34°S

分布 国々 | 国連食糧農業機関の区域 | エコシステム | 事件 | Point map | 導入 | 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).

Length at first maturity / サイズ / 重さ / 年齢

Maturity: Lm ?, range 4 - 4 cm
Max length : 7.5 cm TL オス/雌雄の選別がない; (Ref. 52193)

簡単な記述 形態学 | 形態計測学

背面の脊椎 (合計): 0; 背鰭 (合計): 9-13; 肛門の骨 0; 臀鰭: 9 - 14; 脊つい: 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).

生物学     用語集 (例 epibenthic)

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).

Life cycle and mating behavior 成熟 | 繁殖 | 放精 | | 生産力 | 幼生

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).

主な参考文献 Upload your references | 参考文献 | コーディネーター : Berra, Tim M. | 協力者

Skelton, P.H., 2001. A complete guide to the freshwater fishes of southern Africa. Cape Town (South Africa): Struik Publishers, 395 p. (Ref. 52193)

IUCNのレッドリストの状況は (Ref. 120744)

  欠足データ (DD) ; Date assessed: 01 March 2007

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

  Harmless





Human uses

水産業: 興味がない; 水族館・水槽: 商業
FAO(Publication : search) | FishSource |

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共通名の
類義語
代謝
捕食動物
生態毒性
繁殖
成熟
放精
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形態計測学
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参考文献
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シガテラ(食中毒の名前)
速度
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インターネットの情報源

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00417 (0.00171 - 0.01019), b=3.13 (2.92 - 3.34), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
栄養段階 (Ref. 69278):  3.5   ±0.37 se; Based on food items.
回復力 (Ref. 69278):  低い, 4.5年~14年の倍増期間の最小個体群 (Fec<50).
弱み (Ref. 59153):  Low vulnerability (10 of 100) .