Ahls red mouth tetra
| Red mouth tetra | ||||||||||||
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Red mouth tetra ( Petitella rhodostomus ) |
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| Scientific name | ||||||||||||
| Petitella rhodostomus | ||||||||||||
| ( Ahl , 1924) |
Ahl's red mouth tetra ( Petitella rhodostomus ( synonym : Hemigrammus rhodostomus )) is a South American tetra species. It occurs in the lower Amazon in the Brazilian state of Pará and in the Río Caura , a tributary of the Orinoco in Venezuela .
features
The red mouth tetra has an elongated, laterally strongly flattened body and reaches a length of 4 cm to 5 cm. Its back is brownish to olive, the belly and sides are greenish-white to shiny silver. The forehead is blood-red when feeling well, the iris is silvery. A dark longitudinal ligament that widens towards the rear begins behind the dorsal fin. The caudal fin is banded black-yellowish-white. All other fins are colorless with a white tip or shimmer slightly green. Females are stockier and stronger than the males.
- Fin formula : dorsal 10, anal 14–15.
- Scale formula : mLR 31–33, QR 5/6.
Ahls rummy-nose tetra looks Bleher Rummy ( Petitella bleheri ) very similar. Bleher's redhead tetra, however, lacks the dark longitudinal ligament on the body. The red markings also extend beyond the gill cover.
Systematics and taxonomy
Ahls Rotmaulsalmler was first scientifically described in 1924 by the German zoologist Ernst Ahl in the "Wochenschrift für Aquarien- und Terrarkunde" and assigned to the genus Hemigrammus . The Terra typica is located near Santarém , where the Rio Tapajós flows into the Amazon. At a center in 2020 published study of the close relationship of neon fish ( Paracheirodon ) found the Bleher Rummy closely with Georgie Rummy ( Petit georgiae ) used is. Blehers Rotkopftalmler and Ahls Rotmaulsalmler were then placed in the genus Petitella .
Aquaristics
Keeping and care
Red mouth tetra are peaceful schooling fish that are suitable for community tanks. They can be kept together with discus, neon tetras, armored catfish and dwarf cichlids.
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 .
Especially for red-mouth tetra: At least 5 animals of this species must be kept and the following limit values must be observed:
| value | annotation | |
|---|---|---|
| Minimum size of the aquarium | 80 × 35 × 40 | 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 - 7.0 | Acidity |
| Maximum value of nitrate | 50 | [mg / l] |
literature
- Günther Sterba (Ed.), Gert Brückner: Encyclopedia of Aquaristics and Special Ichthyology. Neumann-Neudamm, Melsungen u. a. 1978, ISBN 3-7888-0252-9 .
- Günther Sterba: The world's freshwater fish. 2nd Edition. Urania, Leipzig / Jena / Berlin 1990, ISBN 3-332-00109-4 .
supporting documents
- ↑ Fish Lexicon. Retrieved February 17, 2019 .
- ↑ Ernst Ahl (1924): About a colorful novelty, Hemigrammus rhodostomus E. Ahl. sp. n. weekly for aquarium and terrarium science v. 21 (no. 18): 405.
- ↑ Bittencourt, PS, Machado, VN, Marshall, BG, Hrbek, T. & Farias, IP (2020): Phylogenetic relationships of the neon tetras Paracheirodon spp. (Characiformes: Characidae: Stethaprioninae), including comments on Petitella georgiae and Hemigrammus bleheri. Neotropical Ichthyology, 18 (2): [1-11]. doi: 10.1590 / 1982-0224-2019-0109
- ^ Rüdiger Riehl, Hans A. Baensch: Aquariums Atlas . Ed .: Hans A. Baensch. 15th edition. tape 1 . Mergus, Melle, Germany 2006, ISBN 3-88244-227-1 , pp. 308 .
- ↑ 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 .
Web links
- Ahls Rotmaulsalmler on Fishbase.org (English)