Corydoras semiaquilus
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Corydoras semiaquilus |
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| Weitzman , 1964 |
Corydoras semiaquilus ( semiaquilus Latin: semi-dark) is one of the largest armored catfish of the genus Corydoras . Its German name is winged catfish , but this is rather unknown. It becomes 6 to 8 inches long.
features
Corydoras semiaquilus has one of the most unmistakable patterns: The basic color is gray-silvery, on top of it dark gray to black, in several places olive to blue-shiny, the side line is decorated with blue areas. Like all Corydoras species, it is an intestinal breather who swims to the surface of the water at regular intervals in order to take in atmospheric air with its mouth.
ecology
Occurrence
Corydoras semiaquilus lives in rivers and streams of tropical South America in the Amazon , Rio Preto , in the Rio-Ucayali system, Loreto and in the Rio Pajo Viejo in Brazil and Peru .
The waters in which Corydoras semiaquilus occurs have the following water values:
- a pH of 6 to 7.5
- a GH value of 2 ° d to 22 ° d
- a KH value of 2 ° to 12 °
- and a temperature of 22 ° C to 27 ° C.
Reproduction
In the wild, the armored catfish perform their typical mating behavior after the rainy season , when the water has warmed up again. After the rainy season there are a lot of suspended matter and therefore prey in the water. The animals perform a special mating behavior in which the male follows the female and sometimes circled or twitches. The female looks for places that are well suited to spawning, such as protected stones, plants and leaves, when pressed by the male. After the female has laid a few eggs in a pocket formed from the pelvic fins, these are fertilized by the male in the so-called T position. The female then attaches the fertilized eggs to a suitable place, while the male usually harasses them again. This cycle is repeated until the female's egg supply is exhausted. Large females can have 100 or more eggs.
nutrition
Corydoras semiaquilus is omnivorous and feeds by looking for algae, detritus , small animals and parts of plants on and near the ground .
Aquaristics
The animals are schooling fish and should be kept in groups of at least eight if they are kept in an aquarium . Care should be taken not to add fish that are too large or predatory. Corydoras semiaquilus is very peaceful and can easily be socialized with smaller fish or shrimp. A soft, not sharp-edged substrate is important (sand is ideal), as otherwise the animals can injure their barbels.
breed
The readiness for spawning is initiated by simulating a rainy season (strong, abrupt partial water changes). One female and two to three male specimens are required for successful breeding. The eggs are stuck to large leaves, stones or simply to the panes of the aquarium by the female. The females are characterized by their fullness and their round ventral fins instead of the pointed ventral fins of the males. The eggs should be separated from the adults after a short time. The larvae, which should be kept at 26 to 28 ° C, are very small and almost transparent. Two to three days after hatching, when the yolk sac is used up, the larvae can be fed with newly hatched Artemia . The finest flake feed made from algae and compound feed can be given later.
Lining
The following food is also suitable in the aquarium: Live food (Artemia, mosquito larvae , Grindal worms ), frozen food ( Cyclops ) and dry food (tablets, food flakes). He's always looking for something to eat on the floor and rummaging through it with his barbels .
literature
- Hans-Georg Evers : Armored catfish . Ulmer Verlag, Stuttgart 1994, ISBN 3-8001-7286-0 .
- Hans A. Baensch , Rüdiger Riehl : aquarium atlas . 5th volume. Mergus Verlag, Melle 1997, ISBN 3-88244-029-5 .
Web links
- Corydoras semiaquilus on Fishbase.org (English)
- Corydoras semiaquilus at PlanetCatfish
- Corydoras semiaquilus in the Corydoras forum
- Genus Corydoras at www.pleco.de