Light tetra
| Light tetra | ||||||||||||
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Hemigrammus erythrozonus |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Hemigrammus erythrozonus | ||||||||||||
| Durbin , 1909 |
The glow light tetra ( Hemigrammus erythrozonus ) is a South American tetra species. Because of its attractive coloring, it is popular as an ornamental fish and was first introduced in Germany in 1933. The systematic classification of the glow-light tetra and its affiliation to the genus Hemigrammus has been discussed for a long time.
distribution and habitat
The light tetra lives in Guyana in the catchment area of the Essequibo . It can be found there in shady forest streams with water temperatures between 24 and 28 degrees Celsius.
features
Male light tetra reach a total length of 4.5 centimeters, the females remain smaller with a maximum of 3.5 centimeters. A broad, ruby-red stripe extends over the gray-brown to olive-green colored body from the rear edge of the gill cover to the base of the caudal fin. Under artificial lighting, a gold shimmering line appears on this strip. The upper half of the iris is colored red, as are the first rays of the dorsal fin. The first rays of the anal fin also show a weaker red. The tips of the caudal, anal and ventral fins are ivory in color.
Females are more rounded and appear fuller, males are significantly slimmer and their belly area looks a bit sunken. Your anal fin is also somewhat elongated in front. As with many tetras, the female's swim bladder is slightly curved towards the anus, while that of the male is straight.
Number of fin rays :
Way of life
Small invertebrates are the main source of food for the swarms of glow-light tetra, but they also eat plant-based food. Like many other tetra, this species is also a free spawner that does not care for the brood. With each mating, ten to twenty eggs are released in dense vegetation. The colorless and transparent eggs are not sticky and sink to the bottom of the water. The larvae hatch after 24 hours. After about a week, they swim freely. Eight to nine months after hatching, the fast-growing offspring will be able to reproduce themselves.
Aquaristics
Keeping and care
Glow-light tetra are peaceful schooling fish that are suitable for community tanks. They should be kept in aquariums with subdued light so that their color comes out well. The first animals were introduced in 1933.
Legal regulation in Austria
In Austria, the minimum requirements for keeping fish are defined in Regulation 486 in Section 7 and its Annex 5. See also the Wikipedia entry ornamental fish .
In addition, the following applies especially to glow-light tetra: at least 5 animals of this type must be kept and the following limit values must be observed:
| value | annotation | |
|---|---|---|
| Minimum size of the aquarium | 60 × 30 × 30 | Length × width × height in [cm] |
| Area for the water temperature | 23-29 | Degrees Celsius [° C] |
| Area for the water hardness | 0-15 | Degree of German total hardness [⁰dGH] |
| PH range | 5.0 - 8.0 | Acidity |
| Maximum value of nitrate | 50 | [mg / l] |
literature
- Axel Zarske: Hemigrammus erythrozonus. In: Claus Schaefer, Torsten Schröer (Hrsg.): The large lexicon of aquaristics. 2 volumes. Eugen Ulmer, Stuttgart 2004, ISBN 3-8001-7497-9 , Volume 1, p. 462.
- Günther Sterba : Freshwater fish in the world. Weltbild Verlag, Augsburg 1998, ISBN 3-89350-991-7 .
Web links
Individual evidence
- ^ Rüdiger Riehl, Hans Baensch: Aquariums Atlas. Volume 1, Mergus Verlag, Melle 2002, ISBN 3-88244-065-1 , p. 268.
- ↑ Axel Zarske: Hemigrammus erythrozonus. 2004.
- ^ Rüdiger Riehl, Hans A. Baensch: Aquariums Atlas . Ed .: Hans A. Baensch. 15th edition. Mergus, Melle, Germany 2006, ISBN 3-88244-227-1 , pp. 268 .
- ↑ BGBl 486., 2nd Animal Husbandry Ordinance. Retrieved February 16, 2019 .
- ↑ BGBL II No. 486 Appendix 5, Minimum Requirements for Keeping Fish. Retrieved February 16, 2019 .