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Galaxias zebratus (Castelnau, 1861)

Cape galaxias
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Galaxias zebratus
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Klassifizierung / Names Namen | Synonyme | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (Strahlenflosser) > 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 Ökologie

; süßwasser benthopelagisch.   Subtropical; 18°C - 24°C (Ref. 12468); 30°S - 34°S

Verbreitung Länder | FAO Gebiete | Ecosystems | Vorkommen | Point map | Einführungen | 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 / Size / Gewicht / Alter

Maturity: Lm ?, range 4 - 4 cm
Max length : 7.5 cm TL Männchen/unbestimmt; (Ref. 52193)

Kurzbeschreibung Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt): 0; Rückenflossenweichstrahlen (insgesamt): 9-13; Afterflossenstacheln 0; Afterflossenweichstrahlen: 9 - 14; Wirbelzahl: 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).

Biologie     Fachlexikon (Englisch) (z.B. 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 Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fecundity | Larven

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).

Hauptreferenz Upload your references | Referenzen | Koordinator : Berra, Tim M. | Partner

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 Rote Liste Status (Ref. 120744)

  Daten mangelhaft (DD) ; Date assessed: 01 March 2007

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless





Nutzung durch Menschen

Fischereien: nicht kommerziell; Aquarium: Kommerziell
FAO(Publication : search) | FishSource |

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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).
Trophic Level (Ref. 69278):  3.5   ±0.37 se; Based on food items.
Widerstandsfähigkeit (Ref. 69278):  niedrig, Verdopplung der Population dauert 4,5 - 14 Jahre. (Fec<50).
Verwundbarkeit (Ref. 59153):  Low vulnerability (10 of 100) .